/*
 * Chim Cu Gáy — UI 100% từ chat-zen-26.lovable.app (Session 16)
 * Tokens: HSL shadcn-style 2 themes (light xanh lá + dark navy cyan)
 */
:root {
    --radius: 1rem;
    --green: hsl(152 82% 50%);
    --danger: hsl(0 72% 55%);
    
    /* ===== DEFAULT THEME (LIGHT) ===== */
    --background: 140 22% 92%;
    --foreground: 155 30% 12%;
    --card: 140 25% 95%;
    --card-foreground: 155 30% 12%;
    --popover: 140 25% 96%;
    --popover-foreground: 155 30% 12%;
    --primary: 158 42% 38%;
    --primary-foreground: 140 30% 97%;
    --primary-glow: 150 50% 55%;
    --secondary: 140 20% 87%;
    --secondary-foreground: 155 30% 16%;
    --muted: 140 18% 86%;
    --muted-foreground: 152 12% 38%;
    --accent: 168 40% 45%;
    --accent-foreground: 140 30% 97%;
    --destructive: 0 65% 48%;
    --destructive-foreground: 0 0% 100%;
    --border: 142 16% 80%;
    --input: 142 16% 80%;
    --ring: 158 42% 38%;

    --tg-bg-chat: 140 22% 90%;
    --tg-bg-sidebar: 142 24% 94%;
    --tg-bg-message-out: 152 35% 82%;
    --tg-bg-message-in: 140 28% 96%;
    --tg-bubble-shadow: 0 1px 3px 0 hsl(155 30% 15% / 0.08);
    --tg-online: 148 65% 38%;
    --tg-typing: 158 42% 38%;
    --tg-unread: 158 42% 38%;
    --tg-hover: 142 20% 87%;

    --gradient-primary: linear-gradient(135deg, hsl(158 42% 38%), hsl(150 50% 52%));
    --gradient-glow: radial-gradient(circle at 30% 20%, hsl(158 45% 45% / 0.15), transparent 60%),
                     radial-gradient(circle at 70% 80%, hsl(178 40% 45% / 0.12), transparent 55%);
    --gradient-mesh: linear-gradient(135deg, hsl(140 22% 92%) 0%, hsl(150 20% 89%) 100%);
    --shadow-glow: 0 0 40px hsl(158 42% 40% / 0.22);
    --shadow-elevated: 0 20px 50px -20px hsl(155 30% 15% / 0.18);

    --sidebar-background: 142 24% 94%;
    --sidebar-foreground: 155 30% 12%;
    --sidebar-border: 142 16% 82%;
    --sidebar-accent: 142 20% 88%;
    --text2: hsl(152 12% 40%);
}

/* ===== DEFAULT THEME (DARK) ===== */
.dark {
    --background: 222 47% 5%;
    --foreground: 210 40% 96%;
    --card: 222 44% 8%;
    --card-foreground: 210 40% 96%;
    --popover: 222 44% 8%;
    --popover-foreground: 210 40% 96%;
    --primary: 189 94% 55%;
    --primary-foreground: 222 47% 6%;
    --primary-glow: 199 100% 65%;
    --secondary: 222 40% 12%;
    --secondary-foreground: 210 40% 92%;
    --muted: 222 35% 13%;
    --muted-foreground: 215 20% 60%;
    --accent: 189 94% 55%;
    --accent-foreground: 222 47% 6%;
    --destructive: 0 72% 55%;
    --destructive-foreground: 0 0% 100%;
    --border: 222 35% 16%;
    --input: 222 35% 14%;
    --ring: 189 94% 55%;

    --tg-bg-chat: 222 47% 5%;
    --tg-bg-sidebar: 222 44% 7%;
    --tg-bg-message-out: 199 80% 22%;
    --tg-bg-message-in: 222 40% 12%;
    --tg-bubble-shadow: 0 2px 8px 0 hsl(0 0% 0% / 0.35);
    --tg-online: 152 82% 50%;
    --tg-typing: 189 94% 55%;
    --tg-unread: 189 94% 55%;
    --tg-hover: 222 40% 11%;

    --gradient-primary: linear-gradient(135deg, hsl(199 100% 55%), hsl(189 94% 60%));
    --gradient-glow: radial-gradient(circle at 20% 15%, hsl(199 100% 50% / 0.18), transparent 55%),
                     radial-gradient(circle at 85% 85%, hsl(263 85% 60% / 0.14), transparent 55%);
    --gradient-mesh: linear-gradient(135deg, hsl(222 47% 5%) 0%, hsl(230 45% 7%) 100%);
    --shadow-glow: 0 0 50px hsl(189 94% 55% / 0.35);
    --shadow-elevated: 0 25px 60px -20px hsl(0 0% 0% / 0.6);

    --sidebar-background: 222 44% 7%;
    --sidebar-foreground: 210 40% 96%;
    --sidebar-border: 222 35% 15%;
    --sidebar-accent: 222 40% 11%;
    --text2: hsl(215 20% 60%);
}

/* ===== FOREST THEME (LIGHT) ===== */
[data-theme-profile="forest"] {
    --background: 158 40% 92%;
    --foreground: 158 79% 5%;
    --card: 158 40% 95%;
    --card-foreground: 158 79% 5%;
    --popover: 158 40% 96%;
    --popover-foreground: 158 79% 5%;
    --primary: 158 79% 30%;
    --primary-foreground: 158 40% 98%;
    --primary-glow: 158 79% 38%;
    --secondary: 158 40% 87%;
    --secondary-foreground: 158 79% 16%;
    --muted: 158 30% 86%;
    --muted-foreground: 158 20% 38%;
    --accent: 158 79% 35%;
    --accent-foreground: 158 40% 98%;
    --border: 158 30% 80%;
    --input: 158 30% 80%;
    --ring: 158 79% 30%;

    --tg-bg-chat: 158 40% 90%;
    --tg-bg-sidebar: 158 40% 94%;
    --tg-bg-message-out: 158 79% 82%;
    --tg-bg-message-in: 158 40% 96%;
    --tg-bubble-shadow: 0 1px 3px 0 hsl(158 79% 15% / 0.08);
    --tg-online: 152 82% 38%;
    --tg-typing: 158 79% 30%;
    --tg-unread: 158 79% 30%;
    --tg-hover: 158 40% 87%;

    --gradient-primary: linear-gradient(135deg, hsl(158 79% 30%), hsl(158 79% 38%));
    --gradient-glow: radial-gradient(circle at 30% 20%, hsl(158 79% 45% / 0.15), transparent 60%),
                     radial-gradient(circle at 70% 80%, hsl(158 79% 45% / 0.12), transparent 55%);
    --gradient-mesh: linear-gradient(135deg, hsl(158 40% 92%) 0%, hsl(158 30% 89%) 100%);
    --shadow-glow: 0 0 40px hsl(158 79% 30% / 0.22);
    --shadow-elevated: 0 20px 50px -20px hsl(158 79% 15% / 0.18);

    --sidebar-background: 158 40% 94%;
    --sidebar-foreground: 158 79% 12%;
    --sidebar-border: 158 30% 82%;
    --sidebar-accent: 158 40% 88%;
    --text2: hsl(158 20% 40%);
}

/* ===== FOREST THEME (DARK) ===== */
[data-theme-profile="forest"].dark {
    --background: 158 79% 5%;
    --foreground: 158 40% 96%;
    --card: 158 79% 8%;
    --card-foreground: 158 40% 96%;
    --popover: 158 79% 8%;
    --popover-foreground: 158 40% 96%;
    --primary: 158 79% 38%;
    --primary-foreground: 158 40% 98%;
    --primary-glow: 158 79% 45%;
    --secondary: 158 60% 12%;
    --secondary-foreground: 158 40% 92%;
    --muted: 158 50% 13%;
    --muted-foreground: 158 20% 60%;
    --accent: 158 79% 45%;
    --accent-foreground: 158 40% 98%;
    --destructive: 0 72% 55%;
    --destructive-foreground: 0 0% 100%;
    --border: 158 40% 16%;
    --input: 158 40% 14%;
    --ring: 158 79% 38%;

    --tg-bg-chat: 158 79% 5%;
    --tg-bg-sidebar: 158 79% 7%;
    --tg-bg-message-out: 158 79% 22%;
    --tg-bg-message-in: 158 60% 12%;
    --tg-bubble-shadow: 0 2px 8px 0 hsl(0 0% 0% / 0.35);
    --tg-online: 152 82% 50%;
    --tg-typing: 158 79% 38%;
    --tg-unread: 158 79% 38%;
    --tg-hover: 158 60% 11%;

    --gradient-primary: linear-gradient(135deg, hsl(158 79% 38%), hsl(158 79% 45%));
    --gradient-glow: radial-gradient(circle at 20% 15%, hsl(158 79% 30% / 0.18), transparent 55%),
                     radial-gradient(circle at 85% 85%, hsl(158 79% 25% / 0.14), transparent 55%);
    --gradient-mesh: linear-gradient(135deg, hsl(158 79% 5%) 0%, hsl(158 70% 7%) 100%);
    --shadow-glow: 0 0 50px hsl(158 79% 38% / 0.35);
    --shadow-elevated: 0 25px 60px -20px hsl(0 0% 0% / 0.6);

    --sidebar-background: 158 79% 7%;
    --sidebar-foreground: 158 40% 96%;
    --sidebar-border: 158 40% 15%;
    --sidebar-accent: 158 60% 11%;
    --text2: hsl(158 20% 60%);
}

/* Thêm style cho Modal chọn Theme */
.theme-option {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    border-radius: 12px;
    cursor: pointer;
    transition: background 0.2s;
    border: 1px solid hsl(var(--border) / 0.5);
    margin-bottom: 8px;
}
.theme-option:hover { background: hsl(var(--secondary) / 0.5); }
.theme-option.active { border-color: hsl(var(--primary)); background: hsl(var(--primary) / 0.1); }
.theme-preview {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    display: flex;
}
.theme-preview.default { background: linear-gradient(135deg, #0f172a 50%, #f1f5f9 50%); }
.theme-preview.forest { background: linear-gradient(135deg, #08442d 50%, #eefbf4 50%); }
.theme-info { flex: 1; }
.theme-name { font-weight: 600; font-size: 0.95rem; }
.theme-desc { font-size: 0.8rem; color: hsl(var(--muted-foreground)); }

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: hsl(var(--background));
    color: hsl(var(--foreground));
    /* Tăng độ nét cho text: antialiasing + kerning (fix mờ trên màn hình thường) */
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    font-feature-settings: 'kern' 1, 'liga' 1;
    background-image: var(--gradient-glow);
    background-attachment: fixed;
    overscroll-behavior: none;
}
/* Session 125: Typography unification — Inter everywhere, no Space Grotesk/JetBrains Mono */
h1, h2, h3, h4 { font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; letter-spacing: -0.01em; }
.font-mono, code, .font-mono-label { font-family: 'Inter', ui-monospace, 'SFMono-Regular', Menlo, monospace; font-variant-numeric: tabular-nums; }
.hidden { display: none !important; }
/* Dropdown/menu khi an: fade out ngan */
.dropdown.hidden { animation: none; }
a { color: hsl(var(--primary)); text-decoration: none; }
a:hover { text-decoration: underline; }
button { cursor: pointer; font-family: inherit; }
input, textarea, select { font-family: inherit; }
/* ===== Focus ring accent (thay outline cam mac dinh cua trinh duyet) ===== */
input:focus-visible, textarea:focus-visible, select:focus-visible, a:focus-visible {
    outline: 2px solid hsl(var(--primary) / 0.7);
    outline-offset: 2px;
    border-radius: 4px;
}
button:focus-visible { outline: 2px solid hsl(var(--primary) / 0.6); outline-offset: 2px; border-radius: 8px; }
/* Khoa scroll body khi modal/lightbox mo */
body.modal-open { overflow: hidden; }
/* ===== Toast notification (thay alert() — Session 26) ===== */
#toast-host { position: fixed; bottom: 22px; left: 50%; transform: translateX(-50%); z-index: 9999; display: flex; flex-direction: column; gap: 8px; align-items: center; pointer-events: none; }
.toast-pill { pointer-events: auto; background: hsl(var(--card) / 0.95); border: 1px solid hsl(var(--border) / 0.6); color: hsl(var(--foreground)); border-radius: 999px; padding: 10px 20px; font-size: 13px; font-weight: 500; box-shadow: var(--shadow-elevated); backdrop-filter: blur(12px); animation: toastIn .22s cubic-bezier(.33,1,.68,1); display: flex; align-items: center; gap: 9px; max-width: 88vw; }
.toast-pill.success { border-color: hsl(var(--green)); }
.toast-pill.success .lucide { color: hsl(var(--green)); }
.toast-pill.error { border-color: hsl(var(--destructive)); }
.toast-pill.error .lucide { color: hsl(var(--destructive)); }
.toast-pill .lucide { width: 16px; height: 16px; }
@keyframes toastIn { from { opacity: 0; transform: translateY(12px) scale(0.96); } to { opacity: 1; transform: none; } }
@keyframes toastOut { from { opacity: 1; } to { opacity: 0; transform: translateY(8px) scale(0.97); } }
.toast-pill.out { animation: toastOut .18s ease-in forwards; }

/* ===== Icons lucide chuẩn ===== */
.lucide { display: inline-block; vertical-align: -0.15em; flex-shrink: 0; }
.lucide.h-4 { width: 16px; height: 16px; }
.lucide.h-5 { width: 20px; height: 20px; }
.lucide.h-6 { width: 24px; height: 24px; }

/* ===== Nền chấm bi (từ gốc index.css) ===== */
.dots-bg {
    background-image:
      radial-gradient(circle at 1px 1px, hsl(var(--primary) / 0.22) 1px, transparent 0),
      radial-gradient(circle at 12px 12px, hsl(var(--foreground) / 0.06) 1px, transparent 0);
    background-size: 24px 24px, 24px 24px;
}
.dots-bg-soft {
    background-image: radial-gradient(circle at 1px 1px, hsl(var(--foreground) / 0.10) 1px, transparent 0);
    background-size: 22px 22px;
}
.grid-bg {
    background-image:
      linear-gradient(hsl(var(--border) / 0.35) 1px, transparent 1px),
      linear-gradient(90deg, hsl(var(--border) / 0.35) 1px, transparent 1px);
    background-size: 32px 32px;
    background-position: -1px -1px;
}
.gradient-primary { background: var(--gradient-primary); }
.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}
.glow { box-shadow: var(--shadow-glow); }
.shadow-elevated { box-shadow: var(--shadow-elevated); }
.ring-glow { box-shadow: 0 0 0 1px hsl(var(--primary) / 0.4), 0 0 24px hsl(var(--primary) / 0.35); }
.hex-avatar {
    clip-path: polygon(50% 0%, 93% 25%, 93% 75%, 50% 100%, 7% 75%, 7% 25%);
    border-radius: 6px;
}

/* ===== Scrollbar ẩn hiện thông minh (Session 39) ===== */
.scrollbar-thin {
    scrollbar-width: thin;
    scrollbar-color: transparent transparent;
    transition: scrollbar-color 0.3s ease;
}
.scrollbar-thin:hover, .scrollbar-thin:active {
    scrollbar-color: hsl(var(--primary) / 0.4) transparent;
}
.scrollbar-thin::-webkit-scrollbar { width: 5px; height: 5px; }
.scrollbar-thin::-webkit-scrollbar-track { background: transparent; }
.scrollbar-thin::-webkit-scrollbar-thumb {
    background-color: transparent;
    border-radius: 20px;
    transition: background-color 0.3s ease;
}
.scrollbar-thin:hover::-webkit-scrollbar-thumb,
.scrollbar-thin:active::-webkit-scrollbar-thumb {
    background-color: hsl(var(--primary) / 0.4);
}
.scrollbar-thin::-webkit-scrollbar-thumb:hover {
    background-color: hsl(var(--primary) / 0.6);
}

/* ===== Album Media (Telegram Style) ===== */
.msg.album {
    padding: 2px;
    max-width: 420px;
    background: transparent !important;
    box-shadow: none !important;
}
.msg-album {
    display: grid;
    gap: 3px;
    border-radius: 12px;
    overflow: hidden;
}

.msg-album img, .msg-album video {
    width: 100% !important;
    height: 100% !important;
    object-fit: cover !important; /* Quay lai cover de lap day khoang trong, user muon "tranh vi tri trong" */
    background: hsl(var(--secondary) / 0.2) !important;
    cursor: pointer;
    transition: opacity 0.2s, transform 0.2s;
    display: block;
}
.msg-album img:hover, .msg-album video:hover { opacity: 0.9; transform: scale(1.02); }
.msg-album img:hover, .msg-album video:hover { opacity: 0.9; }

/* Grid layouts dựa trên số lượng file - Toi uu de khong co khoang trong */
.album-2 { grid-template-columns: 1fr 1fr; aspect-ratio: 16 / 9; }
.album-3 { grid-template-columns: 1fr 1fr; grid-template-rows: 1fr 1fr; aspect-ratio: 1; }
.album-3 img:first-child, .album-3 video:first-child { grid-row: span 2; }
.album-4 { grid-template-columns: 1fr 1fr; grid-template-rows: 1fr 1fr; aspect-ratio: 1; }
.album-5, .album-6 { grid-template-columns: repeat(3, 1fr); aspect-ratio: 3 / 2; }
.album-7, .album-8, .album-9 { grid-template-columns: repeat(3, 1fr); aspect-ratio: 1; }
.album-10 { grid-template-columns: repeat(4, 1fr); aspect-ratio: 1; }

/* Session 121: msg-album-wrap now transparent — single background comes from .msg only.
   Previously this had its own bg + box-shadow, causing double-background on album bubbles. */
.msg-album-wrap {
    display: flex;
    flex-direction: column;
    border-radius: 10px;
    overflow: hidden;
    background: transparent !important;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    box-shadow: none;
}
.out .msg-album-wrap { background: transparent !important; }

.album-caption {
    padding: 8px 12px 6px;
    font-size: 0.95rem;
    line-height: 1.4;
    word-break: break-word;
    color: hsl(var(--foreground));
}
.out .album-caption { color: #e2f8ff; }

.msg.album .meta {
    padding: 0 8px 4px;
    margin-top: -4px;
    position: relative;
    z-index: 2;
}
.msg.album:not(:has(.album-caption)) .meta {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: rgba(0,0,0,0.4);
    padding: 2px 6px;
    border-radius: 10px;
    color: #fff;
    backdrop-filter: blur(4px);
}

/* ================== Reply Styles (Session 46) ================== */
.reply-preview {
    display: flex;
    align-items: center;
    background: rgba(var(--cyan-rgb), 0.05);
    border-left: 3px solid var(--cyan);
    padding: 8px 12px;
    margin: 0 10px;
    border-radius: 4px 4px 0 0;
    position: relative;
    animation: slideUp 0.2s ease-out;
}
@keyframes slideUp { from { transform: translateY(10px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
.rp-content { flex: 1; overflow: hidden; }
.rp-name { font-size: 0.85rem; font-weight: 600; color: var(--cyan); margin-bottom: 2px; }
.rp-text { font-size: 0.8rem; color: var(--text-dim); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.rp-close { background: none; border: none; color: var(--text-dim); cursor: pointer; padding: 4px; font-size: 1.1rem; }
.rp-close:hover { color: var(--red); }

.reply-quote {
    background: rgba(0, 0, 0, 0.05);
    border-left: 3px solid var(--cyan);
    padding: 6px 10px;
    margin-bottom: 6px;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.2s;
    max-width: 100%;
    overflow: hidden;
}
[data-theme="dark"] .reply-quote { background: rgba(255, 255, 255, 0.05); }
.reply-quote:hover { background: rgba(var(--cyan-rgb), 0.1); }
.rq-name { font-size: 0.75rem; font-weight: 600; color: var(--cyan); margin-bottom: 2px; }
.rq-text { font-size: 0.75rem; color: var(--text-dim); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.msg-highlight {
    animation: msgGlow 2s ease-out;
}
@keyframes msgGlow {
    0% { background: rgba(var(--cyan-rgb), 0.3); }
    100% { background: transparent; }
}

/* ===== Animations (thay framer-motion) ===== */
@keyframes msgEnter {
    from { opacity: 0; transform: translateY(10px); }
    to   { opacity: 1; transform: none; }
}
.msg-row.new { animation: msgEnter .15s ease-out; }
@keyframes fadeSlideIn {
    from { opacity: 0; transform: translateY(-5px) scale(0.97); }
    to   { opacity: 1; transform: none; }
}
.fade-in { animation: fadeSlideIn .15s ease-out; }
@keyframes scaleIn {
    from { opacity: 0; transform: scale(0.94); }
    to   { opacity: 1; transform: scale(1); }
}
.scale-in { animation: scaleIn .18s cubic-bezier(.33,1,.68,1); }
@keyframes pulseGlow {
    0%, 100% { box-shadow: 0 0 20px hsl(var(--primary) / 0.35); }
    50%      { box-shadow: 0 0 40px hsl(var(--primary) / 0.55); }
}
.animate-pulse-glow { animation: pulseGlow 3s ease-in-out infinite; }
@keyframes typingDot {
    0%, 60%, 100% { opacity: 0.35; transform: translateY(0); }
    30%           { opacity: 1; transform: translateY(-3px); }
}
.typing-dot { animation: typingDot 1.4s ease-in-out infinite; }
.typing-dot:nth-child(2) { animation-delay: .18s; }
.typing-dot:nth-child(3) { animation-delay: .36s; }

/* ===== Auth page (AuthPage gốc) ===== */
.auth-page { position: relative; min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 16px; overflow: hidden; }
.auth-bg-decor { position: absolute; inset: 0; opacity: .7; pointer-events: none; z-index: 0; }
.auth-blob-1 { position: absolute; top: -160px; left: -160px; width: 500px; height: 500px; border-radius: 9999px; background: hsl(var(--primary) / 0.2); filter: blur(80px); pointer-events: none; }
.auth-blob-2 { position: absolute; bottom: -160px; right: -160px; width: 500px; height: 500px; border-radius: 9999px; background: hsl(var(--accent) / 0.2); filter: blur(80px); pointer-events: none; }
.theme-toggle { position: absolute; top: 20px; right: 20px; z-index: 10; display: flex; align-items: center; gap: 8px; border-radius: 12px; border: 1px solid hsl(var(--border) / 0.6); background: hsl(var(--secondary) / 0.6); padding: 8px 12px; font-size: 11px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: hsl(var(--muted-foreground)); backdrop-filter: blur(12px); transition: all .2s; }
.theme-toggle:hover { color: hsl(var(--primary)); border-color: hsl(var(--primary) / 0.6); }
.auth-container { position: relative; z-index: 1; width: 100%; max-width: 400px; }
.auth-logo { text-align: center; margin-bottom: 32px; }
.auth-logo-tile { position: relative; width: 64px; height: 64px; margin: 0 auto 16px; }
.auth-logo-tile .glow-ring { position: absolute; inset: 0; background: var(--gradient-primary); border-radius: 16px; filter: blur(16px); opacity: .6; animation: pulseGlow 3s ease-in-out infinite; }
.auth-logo-tile .tile { position: relative; width: 64px; height: 64px; background: var(--gradient-primary); border-radius: 16px; display: flex; align-items: center; justify-content: center; box-shadow: var(--shadow-elevated); }
.auth-logo-tile .tile img { width: 40px; height: 40px; object-fit: contain; }
.auth-logo h1 { font-size: 30px; font-weight: 700; }
.auth-subtitle { color: hsl(var(--muted-foreground)); font-size: 14px; margin-top: 8px; }
.auth-card { background: hsl(var(--card) / 0.6); border: 1px solid hsl(var(--border) / 0.5); backdrop-filter: blur(20px) saturate(180%); border-radius: 24px; padding: 24px; box-shadow: var(--shadow-elevated); }
.auth-form .form-group { margin-bottom: 16px; }
.auth-form label { display: block; font-size: 11px; font-weight: 500; letter-spacing: .08em; text-transform: uppercase; color: hsl(var(--muted-foreground)); margin-bottom: 6px; }
.auth-input { width: 100%; background: hsl(var(--secondary) / 0.6); border: 1px solid hsl(var(--border) / 0.6); border-radius: 12px; padding: 10px 14px; font-size: 14px; color: hsl(var(--foreground)); outline: none; transition: all .2s; }
.auth-input::placeholder { color: hsl(var(--muted-foreground)); }
.auth-input:focus { border-color: hsl(var(--primary)); box-shadow: 0 0 0 2px hsl(var(--primary) / 0.2); }
.auth-input-wrap { position: relative; }
.auth-input-wrap .auth-input { padding-right: 38px; }
.auth-eye { position: absolute; right: 10px; top: 50%; transform: translateY(-50%); background: none; border: none; color: hsl(var(--muted-foreground)); padding: 4px; }
.auth-eye:hover { color: hsl(var(--primary)); }
.btn-primary { width: 100%; background: var(--gradient-primary); color: hsl(var(--primary-foreground)); border: none; border-radius: 12px; padding: 12px; font-size: 14px; font-weight: 600; margin-top: 6px; transition: all .2s; }
.btn-primary:hover { opacity: .9; box-shadow: var(--shadow-glow); }
.btn-primary:disabled { opacity: .5; }
.auth-error { color: hsl(var(--destructive)); font-size: 13px; margin: 10px 0 4px; }
.auth-success { color: hsl(var(--green)); font-size: 13px; margin: 10px 0 4px; }
.auth-switch { text-align: center; font-size: 14px; color: hsl(var(--muted-foreground)); margin-top: 20px; }
.auth-switch a { font-weight: 500; }

/* ============ Chat layout ============ */
.app { display: flex; height: 100vh; overflow: hidden; }
/* Sidebar giong goc: nen mau deu hsl(var(--tg-bg-sidebar)) (khong gradient), khong ke thua gradient glow cua body; opacity 0.92 de hoi trong suot + giu ::before cham bi (dots-bg-soft goc) */
.sidebar { position: relative; width: 340px; background: hsl(var(--tg-bg-sidebar) / 0.92); border-right: 1px solid hsl(var(--border) / 0.5); display: flex; flex-direction: column; flex-shrink: 0; }
.sidebar::before { content: ''; position: absolute; inset: 0; background-image: radial-gradient(circle at 1px 1px, hsl(var(--foreground) / 0.10) 1px, transparent 0); background-size: 22px 22px; pointer-events: none; }
.sb-head { display: flex; align-items: center; gap: 10px; padding: 14px 12px; }
.hamburger { display: inline-flex; align-items: center; justify-content: center; width: 34px; height: 34px; padding: 0; background: none; border: 1px solid transparent; color: hsl(var(--sidebar-foreground)); border-radius: 10px; transition: all .15s; cursor: pointer; }
.hamburger:hover { background: hsl(var(--sidebar-accent)); }
.hamburger img.lucide, .hamburger .lucide { width: 18px; height: 18px; display: inline-block; }
.sb-logo { width: 26px; height: 26px; object-fit: contain; flex-shrink: 0; image-rendering: auto; }
/* Logo + hình ảnh trong app luôn render sắc nét, không tự làm mờ khi scale */
img { image-rendering: auto; -webkit-user-drag: none; }
img.sb-logo, img.owl, .auth-logo-tile .tile img { filter: brightness(0.88) saturate(0.94); }
.sb-title { font-weight: 700; font-size: 16px; flex: 1; }
.sb-search-capsule { position: relative; display: flex; align-items: center; flex: 1; min-width: 0; background: hsl(var(--secondary) / 0.35); border: 1px solid hsl(var(--border) / 0.4); border-radius: 999px; padding: 0 14px 0 12px; transition: all .2s; }
.sb-search-capsule:hover { background: hsl(var(--secondary) / 0.5); }
.sb-search-capsule:focus-within { border-color: hsl(var(--primary)); box-shadow: 0 0 0 2px hsl(var(--primary) / 0.18); background: hsl(var(--secondary) / 0.5); }
.sb-search-capsule .lucide { position: static; transform: none; width: 15px; height: 15px; color: hsl(var(--muted-foreground)); pointer-events: none; margin-right: 8px; }
.sb-search-capsule input { width: 100%; min-width: 0; background: none; border: none; padding: 9px 0; font-size: 14px; font-weight: 400; color: hsl(var(--foreground)); outline: none; }
.sb-search-capsule input::placeholder { color: hsl(var(--muted-foreground)); }
.icon-btn { display: inline-flex; align-items: center; justify-content: center; width: 34px; height: 34px; padding: 0; background: none; border: 1px solid transparent; color: hsl(var(--muted-foreground)); border-radius: 10px; transition: all .15s; cursor: pointer; }
.icon-btn:hover { background: hsl(var(--secondary) / 0.6); color: hsl(var(--foreground)); }
/* lucide SVG da duoc recolor truc tiep trong file (icons-cyan.svg / icons-red.svg)
   nen <img> hien dung mau, khong can filter. */
.icon-btn img.lucide, .icon-btn .lucide { width: 18px; height: 18px; display: inline-block; transition: filter 0.2s; }
/* Tối ưu màu icon theme sáng: Đậm nét và chuyên nghiệp hơn */
body:not(.dark) .icon-btn img.lucide, body:not(.dark) .icon-btn .lucide,
body:not(.dark) #chatMoreMenu button img.lucide,
body:not(.dark) .attach-btn img, body:not(.dark) .emoji-btn img, body:not(.dark) .mic-btn img,
body:not(.dark) .bottom-nav .bn-item img,
body:not(.dark) .chat-header .icon-btn img,
body:not(.dark) .ch-brand img,
body:not(.dark) .sb-head button img {
    filter: brightness(0.25) contrast(1.8) saturate(1.2);
}

/* Đồng bộ màu icon danh bạ và các icon khác trên mobile theo theme */
.bn-item {
    color: hsl(var(--muted-foreground));
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}
.bn-item.active {
    color: hsl(var(--primary));
}

/* Fix màu icon danh bạ mobile đồng nhất (Session 57) */
.bn-item[onclick*="contacts"],
.bn-item[onclick*="showContacts"] {
    color: hsl(var(--muted-foreground));
}
.bn-item[onclick*="contacts"].active,
.bn-item[onclick*="showContacts"].active {
    color: hsl(var(--primary));
}

.light .bn-item {
    color: hsl(var(--muted-foreground));
}
.light .bn-item.active {
    color: hsl(var(--primary));
}
.bn-item img {
    width: 22px;
    height: 22px;
    transition: transform 0.2s ease-out, filter 0.2s;
}
.bn-item.active img {
    transform: scale(1.1);
}

/* Đảm bảo icon SVG trong bottom nav (Danh bạ) nhận màu theo theme */
body.dark .bn-item img {
    filter: brightness(0) saturate(100%) invert(87%) sepia(23%) saturate(452%) hue-rotate(152deg) brightness(101%) contrast(92%); /* Màu cyan #7de1f5 */
}
body.dark .bn-item.active img {
    filter: brightness(0) saturate(100%) invert(58%) sepia(93%) saturate(1542%) hue-rotate(153deg) brightness(101%) contrast(96%); /* Màu primary cyan đậm hơn */
}
body:not(.dark) .bn-item.active img {
    filter: brightness(0.1) contrast(2.2); /* Màu đen đậm cho active theme sáng */
}
body:not(.dark) .bn-item:not(.active) img {
    filter: brightness(0.35) contrast(1.5); /* Màu xám đậm cho inactive theme sáng */
}
.icon-btn.danger { color: hsl(var(--destructive)); }
.icon-btn.danger:hover { background: hsl(var(--destructive) / 0.1); }
.notif-btn-wrap { position: relative; display: flex; align-items: center; }
.notif-badge { position: absolute; top: -2px; right: -4px; background: hsl(var(--destructive)); color: hsl(var(--destructive-foreground)); border-radius: 999px; min-width: 16px; height: 16px; font-size: 10px; font-weight: 700; display: flex; align-items: center; justify-content: center; padding: 0 4px; line-height: 1; box-shadow: 0 0 0 2px hsl(var(--background)); }
.notif-badge.hidden { display: none; }
.conv-list { flex: 1; overflow-y: auto; padding: 4px 8px 8px; display: flex; flex-direction: column; gap: 3px; }
/* conv row gốc: px-4 py-3 gap-3; active bg-primary/10; hover bg-tg-hover; pinned bg-primary/5 */
.conv-item { display: flex; align-items: center; gap: 12px; padding: 12px 16px; border-radius: 14px; cursor: pointer; background: transparent; border: 1px solid transparent; transition: all .18s cubic-bezier(.33,1,.68,1); }
.conv-item:hover { background: hsl(var(--tg-hover)); }
.conv-item.active { background: hsl(var(--primary) / 0.1); border-color: transparent; }
.conv-item.active:hover { background: hsl(var(--primary) / 0.14); }
.conv-item.pinned-item { background: hsl(var(--primary) / 0.05); }

/* ===== Avatar (gốc: màu hash tên, hex cho nhóm, dot online) ===== */
.avatar { width: 40px; height: 40px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 15px; font-weight: 600; color: #fff; flex-shrink: 0; position: relative; background: hsl(215 25% 27%); filter: brightness(0.92); }
.avatar img { width: 100%; height: 100%; object-fit: cover; border-radius: 50%; }
.avatar.small { width: 32px; height: 32px; font-size: 12px; }
.avatar.md { width: 44px; height: 44px; font-size: 16px; }
.avatar.lg { width: 64px; height: 64px; font-size: 24px; }
/* Dot online/offline — gốc ChatAvatar: dot bottom-0 right-0 border-card (avatar nhỏ); dot to hơn cho avatar md/lg */
.avatar.online-dot::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 11px;
    height: 11px;
    border-radius: 50%;
    background: #22c55e;
    border: 2px solid hsl(var(--background));
    box-shadow: 0 0 0 1px rgba(34, 197, 94, 0.1);
    animation: pulse-online 2s infinite;
    z-index: 2;
    transform: translate(25%, -25%);
}
.avatar.offline-dot::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: hsl(var(--muted-foreground));
    border: 2px solid hsl(var(--background));
    opacity: 0.8;
    z-index: 2;
    transform: translate(25%, -25%);
}
.avatar.md.online-dot::after, .avatar.lg.online-dot::after { width: 14px; height: 14px; top: 0; right: 0; transform: translate(25%, -25%); }
.avatar.md.offline-dot::after, .avatar.lg.offline-dot::after { width: 11px; height: 11px; top: 0; right: 0; transform: translate(25%, -25%); }

@keyframes pulse-online {
    0% { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.7); }
    70% { box-shadow: 0 0 0 6px rgba(34, 197, 94, 0); }
    100% { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0); }
}
.bot-badge-mark { position: absolute; bottom: -2px; right: -2px; width: 16px; height: 16px; border-radius: 4px; background: hsl(var(--primary)); color: hsl(var(--primary-foreground)); font-size: 10px; font-weight: 700; display: flex; align-items: center; justify-content: center; border: 2px solid hsl(var(--background)); }
.conv-meta { flex: 1; min-width: 0; }
.conv-name { font-weight: 600; font-size: 15px; line-height: 1.3; display: flex; align-items: center; gap: 6px; white-space: nowrap; }
.bot-badge { font-size: 9px; background: hsl(var(--primary)); color: hsl(var(--primary-foreground)); padding: 1px 5px; border-radius: 5px; font-weight: 700; letter-spacing: .04em; }
.conv-last { font-size: 13px; font-weight: 400; line-height: 1.35; color: hsl(var(--muted-foreground)); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-top: 2px; }
.conv-time { font-size: 11px; font-weight: 400; color: hsl(var(--muted-foreground)); flex-shrink: 0; }
.conv-unread { flex-shrink: 0; min-width: 20px; height: 20px; padding: 0 6px; border-radius: 999px; background: hsl(var(--tg-unread)); color: hsl(var(--tg-bg-chat)); font-size: 11px; font-weight: 700; display: flex; align-items: center; justify-content: center; }
.conv-item:not(.active) .conv-unread { background: hsl(var(--tg-online)); }
.sb-profile { display: none; /* Session 34: profile chuyen vao menu hamburger */ }

/* ============ Chat main ============ */
.chat-main { flex: 1; display: flex; flex-direction: column; min-width: 0; background: hsl(var(--tg-bg-chat)); }
.chat-main.dots-bg {
    background-image:
      radial-gradient(circle at 1px 1px, hsl(var(--primary) / 0.22) 1px, transparent 0),
      radial-gradient(circle at 12px 12px, hsl(var(--foreground) / 0.06) 1px, transparent 0);
    background-size: 24px 24px, 24px 24px;
}
.chat-header { display: flex; align-items: center; gap: 12px; padding: 12px 18px; border-bottom: 1px solid hsl(var(--border)); background: hsl(var(--card) / 0.4); position: relative; }
.chat-more-wrap { margin-left: auto; }
.chat-header .name { font-weight: 600; font-size: 16px; font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; cursor: pointer; }
.chat-header .avatar.small { cursor: pointer; }
.chat-header .sub { font-size: 12px; color: hsl(var(--muted-foreground)); }
.chat-header .sub.online-sub { color: hsl(var(--tg-online)); }
.ch-brand { display: none !important; }

/* Session 40: Dropdown menu 3 cham header chat */
.dd-wrap { position: relative; }
#chatMoreMenu {
    position: absolute;
    right: 0;
    top: 100%;
    margin-top: 8px;
    background: hsl(var(--card));
    border: 1px solid hsl(var(--border) / 0.6);
    border-radius: 12px;
    padding: 8px;
    min-width: 180px;
    width: max-content !important;
    white-space: nowrap;
    box-shadow: 0 10px 30px rgba(0,0,0,0.4);
    z-index: 9999;
    animation: scaleIn 0.15s ease-out;
    overflow: visible !important;
    /* Session 59: Position menu exactly below the 3-dot trigger */
    right: 12px;
    left: auto;
    top: 42px; /* Anchor closer to header */
    transform: none;
    transform-origin: top right;
}
#chatMoreMenu button {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    text-align: left;
    padding: 10px 16px;
    border-radius: 8px;
    color: hsl(var(--foreground));
    font-size: 14.5px;
    background: transparent;
    border: none;
    transition: all 0.2s;
    white-space: nowrap;
    cursor: pointer;
}
#chatMoreMenu button:hover {
    background: hsl(var(--accent) / 0.15);
}
#chatMoreMenu .ic {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    opacity: 0.85;
}
#chatMoreMenu button.hidden { display: none !important; }
.chat-header .actions { display: flex; gap: 8px; margin-left: auto; align-items: center; }
.chat-header .actions .icon-btn { 
    width: 38px; 
    height: 38px; 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    border-radius: 50%;
    transition: background 0.2s;
}
.chat-header .actions .icon-btn:hover { background: hsl(var(--accent) / 0.15); }
.chat-header .chat-more-wrap { margin-left: 0; }
.chat-header .actions .icon-btn { width: 34px; height: 34px; }

.msg-area { flex: 1; overflow-y: auto; overflow-x: hidden; padding: 16px 20px; display: flex; flex-direction: column; gap: 8px; scrollbar-width: none; -ms-overflow-style: none; }
.msg-area::-webkit-scrollbar { width: 0; height: 0; display: none; }
.msg-row { display: flex; flex-direction: column; align-items: flex-start; width: 100%; }
.msg-row.out { align-items: flex-end; }
.msg-row > div { display: flex; flex-direction: column; align-items: flex-start; }
.msg-row.out > div { align-items: flex-end; }
.msg-row.group .sender-label { font-size: 11px; color: hsl(var(--primary)); font-weight: 600; margin-bottom: 2px; padding-left: 4px; }

/* ===== Hover action buttons trên bubble (gốc: Trả lời / Thả cảm xúc — fade + trượt) ===== */
.msg-group-actions { position: absolute; top: 50%; margin-top: -16px; display: flex; gap: 4px; opacity: 0; transform: translateX(-6px); transition: opacity .15s ease-out, transform .15s ease-out; pointer-events: none; z-index: 20; }
.msg-row.out .msg-group-actions { right: 100%; transform: translateX(6px); padding-right: 4px; }
.msg-row.in .msg-group-actions { left: 100%; padding-left: 4px; }
.msg-row:hover .msg-group-actions { opacity: 1; transform: translateX(0); pointer-events: auto; }
.msg-row.out:hover .msg-group-actions { transform: translateX(0); }
.mga-btn { display: inline-flex; align-items: center; justify-content: center; width: 30px; height: 30px; border-radius: 8px; background: hsl(var(--secondary) / 0.92); border: 1px solid hsl(var(--border) / 0.5); color: hsl(var(--muted-foreground)); transition: all .12s; box-shadow: 0 2px 8px rgba(0,0,0,.25); }
.mga-btn:hover { background: hsl(var(--tg-hover)); color: hsl(var(--primary)); }
.mga-btn .lucide { width: 15px; height: 15px; }
.msg .meta .tick { color: hsl(var(--primary)); }
.msg.out .meta .tick { color: hsl(var(--foreground) / 0.9); }
.msg { max-width: 92%; min-width: 40px; width: fit-content; padding: 8px 12px; border-radius: 16px; font-size: 15px; font-weight: 400; line-height: 1.5; position: relative; word-break: break-word; overflow-wrap: anywhere; hyphens: auto; text-align: left; transition: transform .12s, box-shadow .12s, background-color .15s; background: hsl(var(--tg-bg-message-in) / 0.30); backdrop-filter: blur(12px) saturate(150%); -webkit-backdrop-filter: blur(12px) saturate(150%); border: 1px solid hsl(var(--foreground) / 0.10); box-shadow: var(--tg-bubble-shadow), inset 0 1px 0 hsl(var(--foreground) / 0.04); white-space: pre-wrap; display: inline-block; vertical-align: top; height: auto; min-height: unset; margin: 0; }
.msg.out { text-align: left; }
.msg-content-wrap { display: flex; flex-direction: column; max-width: 100%; width: 100%; }
.msg-row.out .msg-content-wrap { align-items: flex-end; }
.msg-row.in .msg-content-wrap { align-items: flex-start; }
.msg-row:hover .msg { transform: translateY(-1px); box-shadow: 0 4px 16px rgba(0,0,0,.3); }
.msg.new { animation: msgEnter .15s ease-out; }
.msg.in { border-radius: 18px 18px 6px 18px; }
.msg.in + .reactions { margin-left: 4px; }
.msg.out { background: hsl(var(--tg-bg-message-out) / 0.45); color: hsl(var(--foreground)); border: 1px solid hsl(var(--primary) / 0.40); border-radius: 18px 18px 18px 6px; }
.msg.out + .reactions { margin-right: 4px; justify-content: flex-end; }
.msg.out .meta { color: hsl(var(--foreground) / 0.75); }
/* Session 122: Bỏ override group-self về màu incoming — outgoing luôn là cyan
toàn bộ (kể cả trong group) để phân biệt rõ với tin nhắn của friend. */
.msg-row.out.group .msg.out { background: hsl(var(--tg-bg-message-out) / 0.45); color: hsl(var(--foreground)); }
.msg-row.out.group .msg.out .meta { color: hsl(var(--foreground) / 0.75); }
.msg-row.out.group .msg.out .meta .tick { color: hsl(var(--primary)); }
.msg-row.out.group .msg.out .reply-quote { background: hsl(var(--background) / 0.3); }
/* Media bubble: đồng bộ màu với text bubble — incoming navy, outgoing cyan.
   Trước đây outgoing file dùng --primary/0.18 (cyan nhạt khác text) gây không đồng bộ. */
.msg-row.in .msg.file { background: hsl(var(--tg-bg-message-in) / 0.40) !important; border: 1px solid hsl(var(--border) / 0.7); border-radius: 16px 16px 6px 16px; padding: 6px !important; }
.msg-row.out .msg.file, .msg-row.out.group .msg.out.file { background: hsl(var(--tg-bg-message-out) / 0.45) !important; border: 1px solid hsl(var(--primary) / 0.40); border-radius: 16px 16px 16px 6px; padding: 6px !important; }
.msg-row.out .msg.file .meta, .msg-row.out.group .msg.out.file .meta { color: hsl(var(--foreground) / 0.85); padding: 0 5px 2px; }
.msg-row.in .msg.file .meta { color: hsl(var(--muted-foreground)); padding: 0 5px 2px; }
.msg-row.out.group .av-slot { margin-right: 6px; margin-top: 16px; }
.msg-row.out.group .reactions.has-reaction { margin-left: 4px; margin-right: auto; justify-content: flex-start; }
.msg .meta .tick.read { color: hsl(var(--primary)); }
.msg.system { background: transparent; color: hsl(var(--muted-foreground)); font-size: 12px; align-self: center; max-width: 100%; text-align: center; box-shadow: none; }
.msg .meta { font-size: 11px; font-weight: 400; opacity: .7; margin-top: 4px; text-align: right; display: block; line-height: 1.2; clear: both; }
.msg .meta .edit-tag { font-style: italic; margin-right: 4px; }
.msg.file { 
    display: flex; 
    flex-direction: column; 
    gap: 6px; 
    background: transparent !important; 
    box-shadow: none !important; 
    padding: 0 !important;
}
.msg .file-img { display: block; max-width: 280px; max-height: 320px; width: 100%; height: auto; border-radius: 14px; object-fit: cover; cursor: zoom-in; background: hsl(var(--muted) / 0.2); box-shadow: var(--tg-bubble-shadow); }
.msg .file-link { display: inline-flex; align-items: center; gap: 6px; font-weight: 600; text-decoration: underline; text-underline-offset: 4px; text-decoration-thickness: 1px; }
.msg .file-link:hover { text-decoration-thickness: 2px; }
.msg.file a { color: inherit; }
.msg.pinned { border: 1px dashed hsl(var(--primary)); }

/* Session 125: Markdown rendering inside message bubble (for bot /help responses).
   Hierarchy: <strong> for headings (font-weight 600), <em> for descriptions (regular + italic).
   Inline code `/cmd` gets subtle pill background. */
.msg strong, .msg b { font-weight: 600; color: hsl(var(--foreground)); }
.msg em, .msg i { font-style: italic; font-weight: 400; color: hsl(var(--muted-foreground)); }
.msg code { font-family: 'Inter', ui-monospace, 'SFMono-Regular', Menlo, monospace; font-size: 13px; background: hsl(var(--secondary) / 0.6); padding: 1px 6px; border-radius: 5px; color: hsl(var(--primary)); font-weight: 500; }
.msg a { color: hsl(var(--primary)); text-decoration: underline; text-underline-offset: 2px; }
.msg a:hover { text-decoration-thickness: 2px; }
/* Bot help message — first line is bot name (heading), make it slightly more prominent */
.msg.bot-msg strong:first-child { font-size: 16px; }
.reply-quote { background: hsl(var(--background) / 0.3); border-left: 2px solid hsl(var(--primary)); padding: 5px 9px; border-radius: 6px; font-size: 12px; color: hsl(var(--muted-foreground)); margin-bottom: 5px; }
.msg.out .reply-quote { background: rgba(255,255,255,.15); }

/* Emoji picker nhanh trên bubble (8 emoji — gốc: bottom-full mb-2 bg-popover/95 backdrop-blur rounded-xl shadow-lg) */
.bubble-emoji-picker { position: absolute; bottom: 100%; margin-bottom: 8px; background: hsl(var(--card) / 0.95); border: 1px solid hsl(var(--border) / 0.5); border-radius: 20px; padding: 4px 6px; display: flex; gap: 2px; box-shadow: 0 8px 24px rgba(0,0,0,.3); z-index: 100; backdrop-filter: blur(14px); opacity: 0; transform: scale(0.8); pointer-events: none; transition: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1); }
        /* Session 54: Cau noi vo hinh giua trigger va picker de khong bi mat hover */
        .bubble-emoji-picker::after { content: ""; position: absolute; top: 100%; left: 0; width: 100%; height: 30px; background: transparent; }
        .msg-row.in .bubble-emoji-picker { left: 0; transform-origin: bottom left; }
        .msg-row.out .bubble-emoji-picker { right: 0; transform-origin: bottom right; }
        /* Session 53: Hien thi picker khi hover vao vung mga-btn reaction */
        .mga-btn.reaction-trigger:hover + .bubble-emoji-picker,
        .bubble-emoji-picker:hover { opacity: 1 !important; transform: scale(1) !important; pointer-events: auto !important; }
.bubble-emoji-picker button { background: none; border: none; padding: 4px; border-radius: 8px; transition: all 0.2s; display: flex; align-items: center; justify-content: center; width: 40px; height: 40px; }
.bubble-emoji-picker button:hover { background: hsl(var(--secondary) / 0.65); transform: scale(1.1); }
.bubble-emoji-picker button img { width: 32px; height: 32px; object-fit: contain; }

.reactions { display: flex; gap: 4px; flex-wrap: wrap; margin-top: 4px; opacity: 0; transition: opacity .15s; pointer-events: none; z-index: 5; }
.msg-row:hover .reactions, .msg-row .reactions.has-reaction { opacity: 1; pointer-events: auto; }
.reaction { background: hsl(var(--secondary) / 0.6); border: 1px solid hsl(var(--border) / 0.6); border-radius: 12px; padding: 2px 7px; font-size: 12px; cursor: pointer; transition: border-color .15s; display: flex; align-items: center; gap: 4px; min-height: 24px; }
.reaction img { width: 20px; height: 20px; object-fit: contain; }
.reaction:hover { border-color: hsl(var(--primary)); }
.reaction .r-count { margin-left: 3px; font-size: 10px; color: hsl(var(--muted-foreground)); }

/* Emoji picker grid cho input bar (gốc: grid-cols-8, bottom-full mb-1.5, min-w-[220px]) */
.emoji-picker-grid { position: absolute; bottom: calc(100% + 10px); right: 4px; background: hsl(var(--card)); border: 1px solid hsl(var(--border) / 0.6); border-radius: 16px; padding: 12px; min-width: 300px; box-shadow: 0 14px 40px rgba(0,0,0,.5); z-index: 60; animation: scaleIn .15s ease-out; }
.emoji-picker-grid .ep-grid { display: grid; grid-template-columns: repeat(8, 1fr); gap: 4px; max-height: 280px; overflow-y: auto; padding-right: 4px; }
.emoji-picker-grid .ep-grid::-webkit-scrollbar { width: 4px; }
.emoji-picker-grid .ep-grid::-webkit-scrollbar-thumb { background: hsl(var(--primary) / 0.3); border-radius: 4px; }
.emoji-picker-grid button { background: none; border: none; padding: 6px; border-radius: 8px; transition: all 0.2s; display: flex; align-items: center; justify-content: center; }
.emoji-picker-grid button:hover { background: hsl(var(--secondary) / 0.6); transform: scale(1.1); }
.emoji-picker-grid button img { width: 32px; height: 32px; object-fit: contain; }

/* compose — gốc: px-4 py-3 border-t bg-sidebar; textarea rounded-xl focus:ring-2 ring-primary/30; mic + emoji + paperclip + send (gradient) */
.compose { position: relative; padding: 12px 16px 16px; background: hsl(var(--tg-bg-sidebar)); border-top: 1px solid hsl(var(--border)); display: flex; gap: 6px; align-items: flex-end; }
/* Session 35: bo tron deu (22px), cao toi da 3 dong (~64px), text dai hon thi cuon trong — bo scrollbar mac dinh (thanh trang len/xuong) */
.compose textarea { flex: 1; min-width: 0; resize: none; height: 40px; min-height: 40px; max-height: calc(1.5em * 3 + 20px); padding: 10px 14px; border-radius: 22px; border: 1px solid hsl(var(--border) / 0.25); background: hsl(var(--secondary) / 0.7); color: hsl(var(--foreground)); font-size: 15px; font-weight: 400; line-height: 1.5; overflow-y: auto; overscroll-behavior: contain; outline: none; transition: box-shadow .2s, border-color .2s; }
.compose textarea:focus { border-color: hsl(var(--primary) / 0.6); box-shadow: 0 0 0 2px hsl(var(--primary) / 0.3); }
.compose textarea::-webkit-scrollbar { width: 0; height: 0; }
.compose textarea { scrollbar-width: none; }
.send-btn { width: 40px; height: 40px; border-radius: 10px; border: none; background: none; color: hsl(var(--primary)); flex-shrink: 0; display: flex; align-items: center; justify-content: center; transition: background .15s, transform .15s; }
.send-btn:hover { background: hsl(var(--secondary) / 0.6); }
.send-btn:active { transform: scale(0.92); }
.send-btn .lucide { width: 42px; height: 42px; }
.mic-btn { display: inline-flex; align-items: center; justify-content: center; width: 40px; height: 40px; border-radius: 10px; background: none; border: none; color: hsl(var(--muted-foreground)); flex-shrink: 0; transition: background .15s, color .15s; }
.mic-btn:hover { background: hsl(var(--secondary) / 0.6); color: hsl(var(--foreground)); }
.mic-btn .lucide { width: 20px; height: 20px; }
.emoji-btn { display: inline-flex; align-items: center; justify-content: center; width: 40px; height: 40px; border-radius: 10px; background: none; border: none; color: hsl(var(--muted-foreground)); flex-shrink: 0; transition: background .15s, color .15s; }
.emoji-btn:hover { background: hsl(var(--secondary) / 0.6); color: hsl(var(--primary-glow)); }
.emoji-btn .lucide { width: 20px; height: 20px; }
.emoji-toggle-btn { display: inline-flex; align-items: center; justify-content: center; width: 40px; height: 40px; border-radius: 10px; background: none; border: none; color: hsl(var(--muted-foreground)); flex-shrink: 0; transition: background .15s, color .15s; }
.emoji-toggle-btn:hover { background: hsl(var(--secondary) / 0.6); color: hsl(var(--foreground)); }
.emoji-toggle-btn .lucide { width: 20px; height: 20px; }
.attach-btn { display: inline-flex; align-items: center; justify-content: center; width: 40px; height: 40px; border-radius: 10px; background: none; border: none; color: hsl(var(--muted-foreground)); flex-shrink: 0; transition: background .15s, color .15s; }
.attach-btn:hover { background: hsl(var(--secondary) / 0.6); color: hsl(var(--foreground)); }
.attach-btn .lucide { width: 20px; height: 20px; }

/* Drag & drop overlay (gốc: bg-background/80 backdrop-blur border-2 dashed primary rounded-xl) */
.drag-overlay { position: absolute; inset: 6px; z-index: 70; background: hsl(var(--background) / 0.82); backdrop-filter: blur(4px); border: 2px dashed hsl(var(--primary)); border-radius: 16px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 8px; pointer-events: none; animation: fadeSlideIn .15s ease-out; }
.drag-overlay .big { font-size: 42px; }
.drag-overlay .drag-title { font-size: 16px; font-weight: 600; color: hsl(var(--primary)); }
.drag-overlay .drag-sub { font-size: 13px; color: hsl(var(--muted-foreground)); }

/* FAB cuộn xuống đáy (gốc: bottom-20 right-4 h-9 w-9 rounded-full hover:bg-primary/10) */
.scroll-fab { position: absolute; right: 16px; bottom: 76px; width: 38px; height: 38px; border-radius: 50%; background: hsl(var(--card) / 0.95); border: 1px solid hsl(var(--border) / 0.6); color: hsl(var(--muted-foreground)); display: flex; align-items: center; justify-content: center; z-index: 20; box-shadow: 0 4px 14px rgba(0,0,0,.4); opacity: 0; visibility: hidden; pointer-events: none; transform: translateY(6px) scale(.92); transition: opacity .18s ease, visibility .18s ease, transform .18s ease, background .15s, color .15s; backdrop-filter: blur(8px); }
.scroll-fab.visible { opacity: 1; visibility: visible; pointer-events: auto; transform: translateY(0) scale(1); }
.scroll-fab:hover { background: hsl(var(--primary) / 0.15); color: hsl(var(--primary)); }
.scroll-fab .lucide { width: 18px; height: 18px; }
.scroll-fab.unread { background: hsl(var(--primary)); color: hsl(var(--primary-foreground)); }

/* Thanh tìm tin trong chat (gốc: border-b bg-sidebar flex gap-2 items-center) */
.chat-search-bar { display: flex; align-items: center; gap: 8px; padding: 8px 16px; border-bottom: 1px solid hsl(var(--border)); background: hsl(var(--tg-bg-sidebar)); animation: fadeSlideIn .15s ease-out; }
.chat-search-bar input { flex: 1; min-width: 0; background: hsl(var(--secondary) / 0.7); border: 1px solid hsl(var(--border) / 0.4); border-radius: 10px; padding: 7px 12px; font-size: 13px; color: hsl(var(--foreground)); outline: none; transition: border-color .2s, box-shadow .2s; }
.chat-search-bar input:focus { border-color: hsl(var(--primary) / 0.6); box-shadow: 0 0 0 2px hsl(var(--primary) / 0.25); }
.chat-search-bar .match-info { font-size: 11px; color: hsl(var(--muted-foreground)); flex-shrink: 0; }
.chat-search-bar .highlight-hit { outline: 2px solid hsl(var(--primary)); outline-offset: 2px; border-radius: 4px; }
.chat-search-bar .icon-btn { width: 32px; height: 32px; }

/* preview file chưa gửi — Session 36: nhieu file cuon trong, khong keo dai composer lam mat icon trai/phai
   Quy tac: cao toi da ~3 hang (148px), overflow-y auto, an scrollbar; moi card hang doc 44px (text + thumb) */
#filePreview { width: 100%; margin-bottom: 8px; }
.fp-box { display: flex; flex-direction: column; gap: 6px; background: hsl(var(--secondary) / 0.4); border: 1px solid hsl(var(--border) / 0.5); border-radius: 12px; padding: 8px 12px; max-height: 148px; overflow-y: auto; overscroll-behavior: contain; }
.fp-box::-webkit-scrollbar { width: 0; height: 0; display: none; }
.fp-box { scrollbar-width: none; }
.fp-card { display: flex; align-items: center; gap: 8px; background: hsl(var(--card)); border-radius: 10px; padding: 6px 8px; flex-shrink: 0; min-width: 0; height: 44px; }
.fp-card-thumb { flex-shrink: 0; width: 32px; height: 32px; display: flex; align-items: center; justify-content: center; overflow: hidden; }
.fp-card-thumb img, .fp-card-thumb video { width: 32px; height: 32px; border-radius: 6px; object-fit: cover; }
.fp-card-info { display: flex; flex-direction: column; min-width: 0; flex: 1; }
.fp-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 13px; font-weight: 500; }
.fp-size { font-size: 11px; color: hsl(var(--muted-foreground)); }
.fp-cancel { flex-shrink: 0; background: none; border: none; color: hsl(var(--destructive)); opacity: .8; }
.fp-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.fp-cancel:hover { color: hsl(var(--destructive)); }
.fp-cancel .lucide { width: 14px; height: 14px; }

/* ============ Attachment preview dialog (Telegram Desktop style — Session 37) ============ */
.atp { max-height: 90vh; padding: 0; gap: 0; }
.atp-head { display: flex; align-items: center; padding: 14px 16px 10px; border: none; }
.atp-title { flex: 1; font-size: 15px; font-weight: 600; color: hsl(var(--primary)); }
.atp-close { background: none; border: none; display: inline-flex; align-items: center; justify-content: center; padding: 4px; }
.atp-grid { margin: 0 16px; display: grid; grid-template-columns: 1fr 1fr; gap: 6px; align-items: start; max-height: 46vh; overflow-y: auto; overscroll-behavior: contain; }
.atp-grid::-webkit-scrollbar { width: 0; height: 0; display: none; }
.atp-grid { scrollbar-width: none; }
/* tile chung: vi tri relative cho nut X */
.atp-tile { position: relative; border-radius: 12px; overflow: hidden; border: 1px solid hsl(var(--border) / 0.5); background: hsl(var(--secondary) / 0.4); }
.atp-tile img, .atp-tile video { width: 100%; height: 100%; display: block; }
.atp-tile .atp-x { position: absolute; top: 5px; right: 5px; width: 20px; height: 20px; border-radius: 50%; background: hsl(var(--destructive)); color: hsl(var(--destructive-foreground)); border: none; font-size: 12px; font-weight: 700; cursor: pointer; box-shadow: 0 1px 4px rgba(0,0,0,.4); display: inline-flex; align-items: center; justify-content: center; }
/* 1 file: preview lon top, 2 cot */
.atp-main { grid-column: 1 / span 2; min-height: 150px; max-height: 38vh; display: flex; align-items: center; justify-content: center; }
.atp-main img, .atp-main video { width: 100%; height: 100%; object-fit: contain; }
.atp-main .atp-doc { display: flex; flex-direction: column; align-items: center; gap: 6px; padding: 16px; width: 100%; }
.atp-main .atp-doc .big { font-size: 34px; }
.atp-main .atp-doc .dn { font-size: 13px; font-weight: 500; text-align: center; word-break: break-word; padding: 0 8px; }
.atp-main .atp-doc .ds { font-size: 11px; color: hsl(var(--muted-foreground)); }
/* 2+ files: anh chinh lon trai */
.atp-big { grid-column: 1; grid-row: 1 / span 2; min-height: 180px; max-height: 46vh; }
.atp-big img, .atp-big video { width: 100%; height: 100%; object-fit: cover; }
.atp-sm { min-height: 88px; aspect-ratio: 4 / 3; }
.atp-sm img, .atp-sm video { width: 100%; height: 100%; object-fit: cover; }
.atp-sm .vid-play { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; pointer-events: none; }
.atp-sm .vid-play::after { content: ""; width: 0; height: 0; border-left: 11px solid rgba(255,255,255,.9); border-top: 7px solid transparent; border-bottom: 7px solid transparent; margin-left: 3px; }
/* tile file tai lieu khi 2+ files: icon + ten + size */
.atp-doc-tile { display: flex; flex-direction: column; align-items: center; justify-content: center; height: 100%; gap: 4px; padding: 6px; }
.atp-doc-tile .big { font-size: 26px; }
.atp-doc-tile .dn { font-size: 10px; color: hsl(var(--muted-foreground)); text-align: center; overflow: hidden; text-overflow: ellipsis; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.atp-hint { margin: 10px 16px 4px; font-size: 11px; color: hsl(var(--muted-foreground)); }
.atp-cbx { display: flex; align-items: center; gap: 8px; margin: 8px 16px 0; font-size: 13px; color: hsl(var(--foreground)); }
.atp-cbx input { accent-color: hsl(var(--primary)); width: 15px; height: 15px; }
.atp-cap { display: flex; align-items: center; gap: 8px; margin: 10px 16px 0; border: 1px solid hsl(var(--border) / 0.6); border-radius: 22px; background: hsl(var(--secondary) / 0.5); padding: 6px 8px 6px 14px; }
.atp-cap input { flex: 1; background: transparent; border: none; color: hsl(var(--foreground)); font-size: 14px; outline: none; padding: 2px 0; }
.atp-cap input::placeholder { color: hsl(var(--muted-foreground)); }
.atp-cap-emoji { background: none; border: none; display: inline-flex; align-items: center; justify-content: center; padding: 2px; }
.atp-foot { display: flex; align-items: center; gap: 10px; padding: 12px 16px 14px; }
.atp-btn { flex: 1; padding: 10px 0; border-radius: 14px; border: none; font-size: 14px; font-weight: 600; cursor: pointer; transition: all .18s cubic-bezier(.33,1,.68,1); background: transparent; }
.atp-add { color: hsl(var(--primary)); }
.atp-add:hover { background: hsl(var(--secondary) / 0.5); }
.atp-cancel { color: hsl(var(--muted-foreground)); }
.atp-cancel:hover { color: hsl(var(--foreground)); }
.atp-send { background: linear-gradient(135deg, hsl(var(--primary) / 0.92), hsl(var(--primary))); color: hsl(var(--primary-foreground)); }
.atp-send:hover { filter: brightness(1.12); transform: translateY(-1px); }
.atp-send:disabled { opacity: .5; cursor: not-allowed; transform: none; filter: none; }

.empty-chat { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; color: hsl(var(--muted-foreground)); gap: 12px; }
.empty-chat .big { font-size: 72px; }
.empty-chat img.owl { width: 84px; height: 84px; opacity: .85; }
.empty-chat h2 { font-size: 20px; color: hsl(var(--foreground)); }
.empty-chat p { font-size: 13px; }

/* ============ Context menu tin nhắn ============ */
.ctx-menu { position: fixed; background: hsl(var(--popover)); border: 1px solid hsl(var(--border) / 0.6); border-radius: 12px; padding: 5px; min-width: 170px; box-shadow: 0 10px 30px rgba(0,0,0,.5); z-index: 1000; animation: scaleIn 0.2s cubic-bezier(0.34, 1.56, 0.64, 1) forwards; transform-origin: top left; }
.ctx-menu button { display: flex; align-items: center; gap: 9px; width: 100%; text-align: left; padding: 8px 12px; background: none; border: none; color: hsl(var(--popover-foreground)); border-radius: 9px; font-size: 13px; transition: background .12s; }
.ctx-menu button:hover { background: hsl(var(--secondary) / 0.6); }
.ctx-menu button.danger { color: hsl(var(--destructive)); }
.ctx-menu button .lucide { width: 15px; height: 15px; color: hsl(var(--muted-foreground)); }

/* ============ Modal ============ */
.modal-bg { position: fixed; inset: 0; background: rgba(0,0,0,.55); display: flex; align-items: center; justify-content: center; z-index: 50; backdrop-filter: blur(4px); animation: modalBgFade 0.25s cubic-bezier(0.33, 1, 0.68, 1) forwards; }
.modal-bg .modal { animation: modalContentIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1) forwards; }
/* Mo app smooth: fade-in toan trang khi vao (body chat page, khong phai trang auth) */
@keyframes appFadeIn { 0% { opacity: 0; } 100% { opacity: 1; } }
body:not(.auth-page) { animation: appFadeIn .3s ease-out both; }
.modal { background: hsl(var(--card)); border: 1px solid hsl(var(--border) / 0.5); border-radius: 20px; width: 92%; max-width: 480px; max-height: 86vh; display: flex; flex-direction: column; box-shadow: var(--shadow-elevated); animation: modalContentIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1) forwards; }
.modal.wide { max-width: 820px; }
.modal-head { display: flex; align-items: center; padding: 16px 18px; border-bottom: 1px solid hsl(var(--border) / 0.5); }
.modal-head h3 { flex: 1; font-size: 16px; }
.modal-head button { background: none; border: none; color: hsl(var(--muted-foreground)); display: inline-flex; align-items: center; justify-content: center; }
.modal-head button:hover { color: hsl(var(--foreground)); }
.modal-head .lucide { width: 18px; height: 18px; }
.modal-body { padding: 18px; overflow-y: auto; }
.modal .form-group { margin-bottom: 13px; }
.modal .form-group label { display: block; font-size: 11px; font-weight: 500; letter-spacing: .06em; text-transform: uppercase; color: hsl(var(--muted-foreground)); margin-bottom: 6px; }
.modal input, .modal textarea, .modal select { width: 100%; padding: 10px 13px; border-radius: 12px; border: 1px solid hsl(var(--border) / 0.6); background: hsl(var(--secondary) / 0.5); color: hsl(var(--foreground)); font-size: 14px; outline: none; transition: border-color .2s; }
.modal input:focus, .modal textarea:focus { border-color: hsl(var(--primary)); box-shadow: 0 0 0 2px hsl(var(--primary) / 0.2); }
.modal textarea { min-height: 70px; resize: vertical; }
.modal .btn-row { display: flex; gap: 10px; justify-content: flex-end; padding-top: 4px; }
.btn { padding: 9px 18px; border-radius: 12px; border: 1px solid hsl(var(--border) / 0.6); background: hsl(var(--secondary) / 0.6); color: hsl(var(--foreground)); font-size: 13px; font-weight: 600; transition: all .18s cubic-bezier(.33,1,.68,1); }
.btn:hover { background: hsl(var(--secondary)); transform: translateY(-1px); filter: brightness(1.15); }
.btn:active { transform: translateY(0); filter: none; }
.hamburger:hover, .icon-btn:hover { background: hsl(var(--secondary) / 0.5); }
.send-btn:hover { transform: scale(1.05); }
.send-btn:active { transform: scale(0.95); }
.btn.primary { background: var(--gradient-primary); border-color: hsl(var(--primary)); color: hsl(var(--primary-foreground)); }
.btn.primary:hover { box-shadow: var(--shadow-glow); }
.btn.danger { background: transparent; border-color: hsl(var(--destructive)); color: hsl(var(--destructive)); }
.btn.small { padding: 5px 12px; font-size: 12px; border-radius: 9px; }
.btn:disabled { opacity: .45; cursor: not-allowed; }

/* menu dropdown (hamburger) */
.dd-wrap { position: relative; display: inline-flex; align-items: center; }
.dropdown { position: absolute; top: calc(100% + 8px); left: 0; background: hsl(var(--popover)); border: 1px solid hsl(var(--border) / 0.6); border-radius: 12px; padding: 6px; min-width: 240px; box-shadow: 0 12px 32px rgba(0,0,0,.5); z-index: 50; animation: dropdownBounce 0.25s cubic-bezier(0.34, 1.56, 0.64, 1) forwards; transform-origin: top left; }
.dropdown.anchor-left { transform-origin: top right; }
.dropdown.anchor-left { left: auto; right: 0; }
.dropdown button { display: flex; align-items: center; gap: 10px; width: 100%; text-align: left; padding: 10px 12px; background: none; border: none; color: hsl(var(--popover-foreground)); border-radius: 9px; font-size: 13.5px; transition: background .12s; }
.dropdown button:hover { background: hsl(var(--secondary) / 0.6); }
.dropdown button .ic { display: inline-flex; color: hsl(var(--muted-foreground)); }
.dropdown button .ic .lucide { width: 16px; height: 16px; }
.dropdown .dd-divider { height: 1px; background: hsl(var(--border) / 0.5); margin: 4px 0; }
/* Profile header trong menu hamburger (goc Telegram Desktop: profile hien thi tren cung) */
.mm-profile { display: flex; align-items: center; gap: 12px; padding: 14px 12px 12px; border-radius: 9px; cursor: pointer; transition: background .15s; }
.mm-profile:hover { background: hsl(var(--secondary) / 0.5); }
.mm-avatar { width: 42px; height: 42px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 15px; font-weight: 600; color: hsl(var(--primary-foreground)); flex-shrink: 0; filter: brightness(0.92); }
.mm-info { flex: 1; min-width: 0; }
.mm-name { font-size: 14px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.mm-user { font-size: 11.5px; color: hsl(var(--muted-foreground)); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-top: 2px; }
.mm-chevron { color: hsl(var(--muted-foreground)); }
.mm-version { font-size: 11px; color: hsl(var(--muted-foreground) / 0.7); padding: 8px 12px 4px; font-weight: 500; }
.mm-profile .mm-avatar { background: var(--gradient-primary); }
.badge { background: hsl(var(--destructive)); color: hsl(var(--destructive-foreground)); font-size: 10px; padding: 1px 7px; border-radius: 10px; margin-left: auto; font-weight: 700; }

/* dropdown header chat (more-vertical) */
.header-dropdown { position: absolute; background: hsl(var(--popover)); border: 1px solid hsl(var(--border) / 0.6); border-radius: 12px; padding: 5px; min-width: 180px; box-shadow: 0 12px 32px rgba(0,0,0,.5); z-index: 40; animation: scaleIn 0.2s cubic-bezier(0.34, 1.56, 0.64, 1) forwards; transform-origin: top right; }
.header-dropdown button { display: flex; align-items: center; gap: 9px; width: 100%; text-align: left; padding: 9px 12px; background: none; border: none; color: hsl(var(--popover-foreground)); border-radius: 9px; font-size: 13px; }
.header-dropdown button:hover { background: hsl(var(--secondary) / 0.6); }
.header-dropdown button .lucide { width: 15px; height: 15px; color: hsl(var(--muted-foreground)); }
.header-dropdown button.danger { color: hsl(var(--destructive)); }

/* danh sách trong modal */
/* Session 30: modal Danh ba — cac icon can deu, khong sat vao canh */
.list-item { 
    display: flex; 
    align-items: center; 
    gap: 12px; 
    padding: 10px 14px; 
    margin: 2px 6px; 
    border-radius: 12px; 
    transition: background 0.2s ease;
}
.list-item:hover {
    background: hsl(var(--secondary) / 0.4);
}
.list-item:not(:last-child) { 
    border-bottom: 1px solid hsl(var(--border) / 0.2); 
}
/* Session 30: nut icon chat Danh ba can deu tay phai, khong sat vao vien modal */
.list-item > .btn.small { 
    margin-left: auto; 
    margin-right: 3px; 
    flex-shrink: 0; 
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: hsl(var(--secondary) / 0.3);
    border: 1px solid hsl(var(--border) / 0.4);
}
.list-item > .btn.small:hover {
    background: hsl(var(--primary) / 0.15);
    border-color: hsl(var(--primary) / 0.4);
}
.list-item > .btn.small + .btn.small { margin-left: 8px; }
.list-item .li-info { flex: 1; min-width: 0; }
.list-item .li-name { font-size: 14px; font-weight: 600; color: hsl(var(--foreground)); }
.list-item .li-sub { font-size: 12px; color: hsl(var(--muted-foreground)); margin-top: 1px; }

/* Custom Search Input for Contacts */
.contacts-search-wrap {
    position: relative;
    margin: 12px 6px;
}
.contacts-search-wrap input {
    width: 100%;
    background: hsl(var(--secondary) / 0.3);
    border: 1px solid hsl(var(--border) / 0.5);
    border-radius: 10px;
    padding: 10px 14px;
    font-size: 13.5px;
    color: hsl(var(--foreground));
    outline: none;
    transition: all 0.2s;
}
.contacts-search-wrap input:focus {
    border-color: hsl(var(--primary));
    background: hsl(var(--secondary) / 0.5);
    box-shadow: 0 0 0 2px hsl(var(--primary) / 0.1);
}
.contacts-section-title {
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: hsl(var(--primary));
    margin: 16px 12px 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.contacts-section-title::after {
    content: '';
    flex: 1;
    height: 1px;
    background: hsl(var(--border) / 0.3);
}
.user-avatars { display: flex; flex-wrap: wrap; gap: 10px; max-height: 240px; overflow-y: auto; }
.user-pick { display: flex; flex-direction: column; align-items: center; gap: 5px; cursor: pointer; border: 2px solid transparent; border-radius: 12px; padding: 6px; transition: border-color .15s, background .15s; }
.user-pick:hover { background: hsl(var(--primary) / 0.08); }
.user-pick.sel { border-color: hsl(var(--primary)); background: hsl(var(--primary) / 0.12); }
.user-pick .check { font-size: 13px; color: hsl(var(--primary)); font-weight: 700; opacity: 0; transform: scale(.6); transition: opacity .15s, transform .15s; }
.user-pick.sel .check { opacity: 1; transform: scale(1); }
.new-owner-pick { border: 2px solid transparent; border-radius: 12px; transition: border-color .15s, background .15s; }
.new-owner-pick:hover { background: hsl(var(--primary) / 0.08); }
.new-owner-pick.sel { border-color: hsl(var(--primary)); background: hsl(var(--primary) / 0.12); }
.new-owner-pick .nop-check { font-size: 15px; color: hsl(var(--primary)); font-weight: 700; opacity: 0; transform: scale(.6); transition: opacity .15s, transform .15s; }
.new-owner-pick.sel .nop-check { opacity: 1; transform: scale(1); }
#nopConfirm:disabled { opacity: .45; cursor: not-allowed; }

/* ===== Contacts tabs (gốc: pills rounded-lg text-xs) ===== */
.ct-tabs { display: flex; gap: 6px; margin-bottom: 12px; }
.ct-tab { padding: 6px 13px; border-radius: 8px; font-size: 12px; font-weight: 500; border: none; background: hsl(var(--secondary) / 0.5); color: hsl(var(--muted-foreground)); transition: all .15s; }
.ct-tab.active { background: var(--gradient-primary); color: hsl(var(--primary-foreground)); }
.ct-user-row { display: flex; align-items: center; gap: 12px; padding: 10px 8px; border-radius: 12px; transition: background .15s; }
.ct-user-row:hover { background: hsl(var(--tg-hover)); }
.ct-actions { display: flex; gap: 6px; margin-left: auto; }
.ct-actions button { display: inline-flex; align-items: center; justify-content: center; width: 30px; height: 30px; border-radius: 9px; border: none; background: hsl(var(--secondary) / 0.6); color: hsl(var(--foreground)); transition: all .15s; }
.ct-actions button:hover { background: hsl(var(--primary) / 0.15); color: hsl(var(--primary)); }
.ct-actions button.primary-act { background: var(--gradient-primary); color: hsl(var(--primary-foreground)); }
.ct-actions button.danger-act { background: hsl(var(--destructive) / 0.12); color: hsl(var(--destructive)); }
.ct-actions button .lucide { width: 15px; height: 15px; }
.friend-req-wrap { margin-bottom: 14px; border: 1px solid hsl(var(--border) / 0.4); border-radius: 14px; padding: 8px; }
.friend-req-head { font-size: 12px; font-weight: 600; color: hsl(var(--muted-foreground)); padding: 4px 6px 8px; text-transform: uppercase; letter-spacing: .06em; }

/* settings item row (gốc SettingsView) */
.st-item { display: flex; align-items: center; gap: 12px; padding: 11px 8px; border-radius: 12px; cursor: pointer; transition: background .15s; }
.st-item:hover { background: hsl(var(--tg-hover)); }
.st-item .st-ic { display: inline-flex; align-items: center; justify-content: center; width: 34px; height: 34px; border-radius: 10px; background: hsl(var(--secondary) / 0.6); color: hsl(var(--foreground)); }
.st-item .st-ic .lucide { width: 17px; height: 17px; }
.st-item .st-label { flex: 1; font-size: 13.5px; font-weight: 500; }
.st-item.danger .st-label, .st-item.danger .st-ic { color: hsl(var(--destructive)); }
.st-divider { height: 1px; background: hsl(var(--border) / 0.5); margin: 8px 0; }

/* ============ Bot Management & Admin page (light) ============ */
.page { min-height: 100vh; padding: 28px 10%; background: hsl(var(--background)); }
.page-head { display: flex; align-items: center; gap: 14px; margin-bottom: 22px; }
.page-head h2 { font-size: 22px; }
.page-head .back { color: hsl(var(--muted-foreground)); font-size: 13px; }
.tabs { display: flex; gap: 8px; margin-bottom: 18px; border-bottom: 1px solid hsl(var(--border) / 0.5); }
.tab { padding: 10px 16px; background: none; border: none; color: hsl(var(--muted-foreground)); font-size: 14px; border-bottom: 2px solid transparent; transition: all .18s; }
.tab:hover { color: hsl(var(--foreground)); }
.tab.active { color: hsl(var(--primary)); border-color: hsl(var(--primary)); font-weight: 600; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 860px) { .grid-2 { grid-template-columns: 1fr; } }
.b-card { background: hsl(var(--card)); border: 1px solid hsl(var(--border) / 0.5); border-radius: 16px; padding: 16px; }
.b-card .b-head { display: flex; align-items: center; gap: 11px; margin-bottom: 12px; }
.b-card .b-name { font-weight: 700; font-size: 15px; }
.b-card .b-sub { font-size: 12px; color: hsl(var(--muted-foreground)); }
.status-chip { font-size: 11px; padding: 3px 9px; border-radius: 10px; font-weight: 700; margin-left: auto; }
.status-chip.active { background: hsl(var(--tg-online) / 0.16); color: hsl(var(--tg-online)); }
.status-chip.inactive { background: hsl(var(--destructive) / 0.14); color: hsl(var(--destructive)); }
.token-box { font-family: 'JetBrains Mono', monospace; font-size: 12px; background: hsl(var(--secondary) / 0.4); border: 1px solid hsl(var(--border) / 0.5); border-radius: 8px; padding: 8px 10px; word-break: break-all; color: hsl(var(--muted-foreground)); }
.code-block { font-family: 'JetBrains Mono', monospace; font-size: 12px; background: hsl(var(--secondary) / 0.4); border: 1px solid hsl(var(--border) / 0.5); border-radius: 8px; padding: 10px; margin-top: 8px; white-space: pre-wrap; color: hsl(var(--muted-foreground)); }
.b-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
table.data { width: 100%; border-collapse: collapse; font-size: 13px; }
table.data th, table.data td { text-align: left; padding: 9px 10px; border-bottom: 1px solid hsl(var(--border) / 0.5); }
table.data th { color: hsl(var(--muted-foreground)); font-weight: 600; font-size: 12px; }
table.data tbody tr { transition: background .15s; }
table.data tbody tr:hover { background: hsl(var(--secondary) / 0.35); }
.stat-cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 22px; }
@media (max-width: 900px) { .stat-cards { grid-template-columns: repeat(2, 1fr); } }
.stat { background: hsl(var(--card)); border: 1px solid hsl(var(--border) / 0.5); border-radius: 16px; padding: 16px; }
.stat .v { font-size: 26px; font-weight: 800; }
.stat .l { font-size: 12px; color: hsl(var(--muted-foreground)); margin-top: 2px; }

/* Nút tìm tin trong header (mở chat-search-bar) */
.chat-header .actions { display: flex; gap: 4px; position: relative; }
.chat-header .actions .icon-btn { width: 34px; height: 34px; }

/* ============ Info panel (slide-in bên phải chat — gốc InfoPanel width 0→320 0.2s) ============ */
.info-panel-wrap { position: relative; flex-shrink: 0; display: flex; z-index: 40; }
.info-overlay { position: fixed; inset: 0; background: rgba(0,0,0,.35); z-index: 38; animation: modalBgFade .15s ease-out; }
.info-panel { width: 0; background: hsl(var(--tg-bg-sidebar)); border-left: 1px solid hsl(var(--border) / 0.6); overflow: hidden; transition: width .3s cubic-bezier(.33,1,.68,1); display: flex; flex-direction: column; }
.info-panel.open { width: 300px; animation: slideInRight 0.3s cubic-bezier(0.33, 1, 0.68, 1) forwards; }
.info-panel-inner { width: 300px; height: 100vh; overflow-y: auto; display: flex; flex-direction: column; }
.info-panel-inner::-webkit-scrollbar { width: 5px; }
.ip-head { display: flex; align-items: center; justify-content: space-between; padding: 12px 16px; border-bottom: 1px solid hsl(var(--border) / 0.5); }
.ip-head h4 { font-size: 14px; font-weight: 600; }
.ip-hero { display: flex; flex-direction: column; align-items: center; padding: 24px 16px 20px; }
.ip-hero .avatar { width: 72px; height: 72px; font-size: 26px; }
.ip-hero h5 { margin-top: 12px; font-size: 17px; font-weight: 600; }
.ip-hero p { font-size: 12.5px; color: hsl(var(--muted-foreground)); margin-top: 4px; }
.ip-row { display: flex; align-items: center; gap: 12px; width: 100%; padding: 10px 16px; background: none; border: none; color: hsl(var(--foreground)); text-align: left; font-size: 13.5px; transition: background .12s; }
.ip-row:hover { background: hsl(var(--tg-hover)); }
.ip-row .ip-ic { display: inline-flex; align-items: center; justify-content: center; width: 26px; height: 26px; flex-shrink: 0; }
.ip-row .ip-ic .lucide { width: 16px; height: 16px; color: hsl(var(--muted-foreground)); }
.ip-row .ip-label { flex: 1; min-width: 0; }
.ip-row .ip-detail { font-size: 11px; color: hsl(var(--muted-foreground)); flex-shrink: 0; }
.ip-sec { margin-top: 14px; padding: 0 16px; }
.ip-sec-head { display: flex; align-items: center; gap: 6px; }
.ip-sec-head h6 { font-size: 11px; font-weight: 600; color: hsl(var(--muted-foreground)); text-transform: uppercase; letter-spacing: .06em; }
.ip-add-btn { margin-left: auto; font-size: 11px; font-weight: 500; padding: 4px 10px; border-radius: 10px; background: hsl(var(--primary) / 0.12); color: hsl(var(--primary)); border: none; transition: background .12s; }
.ip-add-btn:hover { background: hsl(var(--primary) / 0.2); }
.ip-add-box { margin-top: 8px; margin-bottom: 8px; animation: fadeSlideIn .15s ease-out; }
.ip-add-box input { width: 100%; background: hsl(var(--secondary)); border: 1px solid transparent; border-radius: 12px; padding: 8px 12px; font-size: 12px; color: hsl(var(--foreground)); outline: none; }
.ip-add-box input:focus { border-color: hsl(var(--primary) / 0.6); box-shadow: 0 0 0 2px hsl(var(--primary) / 0.25); }
.ip-add-list { max-height: 150px; overflow-y: auto; display: flex; flex-direction: column; gap: 3px; margin-top: 6px; }
.ip-add-item { display: flex; align-items: center; gap: 10px; width: 100%; padding: 6px 8px; border-radius: 10px; background: none; border: none; color: hsl(var(--foreground)); text-align: left; transition: background .12s; }
.ip-add-item:hover { background: hsl(var(--tg-hover)); }
.ip-add-item .aip-info { flex: 1; min-width: 0; }
.ip-add-item .aip-name { font-size: 12.5px; font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.ip-add-item .aip-sub { font-size: 10px; color: hsl(var(--muted-foreground)); }
.ip-add-item .aip-ic .lucide { width: 14px; height: 14px; color: hsl(var(--primary)); }
.ip-member { display: flex; align-items: center; gap: 10px; padding: 8px; border-radius: 10px; cursor: pointer; transition: background .12s; }
.ip-member:hover { background: hsl(var(--tg-hover)); }
.ip-member .im-info { flex: 1; min-width: 0; }
.ip-member .im-name { font-size: 13px; font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.ip-member .im-sub { font-size: 11px; color: hsl(var(--muted-foreground)); }
.ip-member .im-role { font-size: 11px; color: hsl(var(--muted-foreground)); text-transform: capitalize; flex-shrink: 0; }
.ip-actions { margin-top: auto; padding: 14px 10px 16px; display: flex; flex-direction: column; gap: 3px; }
.ip-action { display: flex; align-items: center; gap: 12px; width: 100%; padding: 10px 14px; border-radius: 10px; background: none; border: none; color: hsl(var(--foreground)); text-align: left; font-size: 13px; transition: background .12s, color .12s; }
.ip-action .lucide { width: 16px; height: 16px; }
.ip-action.primary-act { color: hsl(var(--primary)); }
.ip-action.primary-act:hover { background: hsl(var(--primary) / 0.1); }
.ip-action.neutral-act { color: hsl(var(--muted-foreground)); }
.ip-action.neutral-act:hover { background: hsl(var(--muted)); }
.ip-action.danger-act { color: hsl(var(--destructive)); }
.ip-action.danger-act:hover { background: hsl(var(--destructive) / 0.1); }

/* ================== Thong bao (panel gốc: centered card) ================== */
.notif-btn { position: relative; }
.notif-item { display: flex; align-items: flex-start; gap: 10px; width: 100%; text-align: left; padding: 10px 12px; background: none; border: none; color: hsl(var(--popover-foreground)); border-radius: 10px; cursor: pointer; transition: background .12s; }
.notif-item:hover { background: hsl(var(--secondary) / 0.6); }
.notif-item.unread { background: hsl(var(--primary) / 0.08); }
.notif-item .ni-icon { display: inline-flex; align-items: center; justify-content: center; width: 30px; height: 30px; border-radius: 8px; background: hsl(var(--secondary) / 0.6); color: hsl(var(--primary)); flex-shrink: 0; }
.notif-item .ni-icon .lucide { width: 15px; height: 15px; }
.notif-item .ni-title { font-size: 13px; font-weight: 600; line-height: 1.3; }
.notif-item .ni-desc { font-size: 12px; color: hsl(var(--muted-foreground)); line-height: 1.35; margin-top: 1px; }
.notif-item .ni-time { font-size: 11px; color: hsl(var(--muted-foreground)); margin-top: 2px; }
.notif-item.unread .ni-dot { display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: hsl(var(--primary)); margin-left: 6px; vertical-align: middle; }
.notif-item .ni-dot { display: none; }
.notif-empty { padding: 26px 14px; text-align: center; color: hsl(var(--muted-foreground)); font-size: 12.5px; }
/* panel centered (gốc NotificationPanel: overlay pt-16) */
/* Session 124: Notification dropdown — xổ xuống từ icon chuông (giống hamburger menu),
   thay vì overlay full-screen modal cũ. Toggle: click chuông = mở, click lại = đóng. */
.notif-overlay { position: absolute; top: calc(100% + 8px); left: 0; z-index: 55; background: hsl(var(--popover)); border: 1px solid hsl(var(--border) / 0.6); border-radius: 14px; width: min(380px, 92vw); max-height: 70vh; box-shadow: 0 14px 40px rgba(0,0,0,.55); animation: dropdownBounce 0.22s cubic-bezier(0.34, 1.56, 0.64, 1) forwards; transform-origin: top left; display: flex; flex-direction: column; overflow: hidden; }
.notif-overlay.hidden { animation: none; }
.notif-panel { display: flex; flex-direction: column; overflow: hidden; flex: 1; min-height: 0; }
.notif-panel-head { display: flex; align-items: center; gap: 10px; padding: 12px 14px; border-bottom: 1px solid hsl(var(--border) / 0.5); flex-shrink: 0; }
.notif-panel-head h4 { flex: 1; font-size: 14px; font-weight: 600; }
.notif-panel-head button { display: inline-flex; align-items: center; justify-content: center; width: 28px; height: 28px; border-radius: 8px; background: none; border: none; color: hsl(var(--muted-foreground)); cursor: pointer; transition: background .12s; }
.notif-panel-head button:hover { background: hsl(var(--secondary) / 0.6); color: hsl(var(--foreground)); }
.notif-panel-body { overflow-y: auto; padding: 6px; flex: 1; min-height: 0; }

/* ===== Media viewer (lightbox anh/video trong tin nhan — Session 25) ===== */
/* Session 123: Media viewer — toolbar moved to TOP, stage fills rest, zoom transform support */
.media-viewer { position: fixed; inset: 0; background: rgba(0,0,0,.92); z-index: 2000; display: flex; flex-direction: column; align-items: stretch; justify-content: flex-start; backdrop-filter: blur(25px); animation: modalBgFade .22s cubic-bezier(.33,1,.68,1); }
.mv-wrap { position: relative; width: 100%; height: 100%; display: flex; flex-direction: column; align-items: center; justify-content: flex-start; padding: 16px 20px 20px; box-sizing: border-box; overflow: hidden; }
/* Toolbar docked at top, full width pill */
.mv-toolbar { position: relative; display: flex; align-items: center; gap: 10px; background: hsl(var(--card) / 0.92); border: 1px solid hsl(var(--border) / 0.6); border-radius: 999px; padding: 8px 16px; box-shadow: 0 10px 30px rgba(0,0,0,.5); backdrop-filter: blur(15px); z-index: 2001; margin-bottom: 16px; flex-shrink: 0; max-width: 92vw; }
.mv-name { font-size: 13px; font-weight: 600; color: hsl(var(--foreground)); max-width: 38ch; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.mv-btn { width: 34px; height: 34px; display: inline-flex; align-items: center; justify-content: center; border-radius: 999px; border: 1px solid hsl(var(--border) / 0.5); background: hsl(var(--secondary) / 0.4); cursor: pointer; transition: all .18s cubic-bezier(.33,1,.68,1); flex-shrink: 0; }
.mv-btn:hover { background: hsl(var(--primary) / 0.25); border-color: hsl(var(--primary)); }
.mv-btn:active { transform: scale(0.94); }
.mv-btn .lucide { width: 18px; height: 18px; }
.mv-btn.primary { background: linear-gradient(135deg, hsl(var(--primary) / 0.35), hsl(var(--accent) / 0.25)); border-color: hsl(var(--primary) / 0.6); }
.mv-btn.active { background: hsl(var(--primary) / 0.35); border-color: hsl(var(--primary)); }
/* Stage fills remaining vertical space; image zoom transform applied here */
.mv-stage { position: relative; display: flex; align-items: center; justify-content: center; flex: 1; width: 100%; height: 100%; overflow: hidden; margin-bottom: 0; }
.mv-stage img, .mv-stage video { max-width: 95%; max-height: 95%; width: auto; height: auto; border-radius: 12px; object-fit: contain; box-shadow: 0 20px 60px rgba(0,0,0,.8); outline: none; animation: scaleIn .25s cubic-bezier(.33,1,.68,1); transition: transform .15s cubic-bezier(.33,1,.68,1); transform-origin: center center; will-change: transform; }
.mv-stage img.zoomable { cursor: zoom-in; }
.mv-stage img.zoomable.zoomed { cursor: grab; }
.mv-stage img.zoomable.dragging { cursor: grabbing; transition: none; }
.mv-stage video { transition: none; }
/* Zoom level badge */
.mv-zoom-badge { position: absolute; top: 8px; left: 50%; transform: translateX(-50%); background: hsl(var(--card) / 0.92); border: 1px solid hsl(var(--border) / 0.6); border-radius: 999px; padding: 4px 12px; font-size: 11px; font-weight: 600; color: hsl(var(--foreground)); backdrop-filter: blur(12px); z-index: 2002; pointer-events: none; opacity: 0; transition: opacity .25s; }
.mv-zoom-badge.visible { opacity: 1; }
.mv-nav { position: absolute; top: 50%; transform: translateY(-50%); }
.mv-nav.prev { left: 14px; }
.mv-nav.next { right: 14px; }
.mv-nav { z-index: 3; background: hsl(var(--card) / 0.88); border-color: hsl(var(--primary) / 0.65); box-shadow: 0 6px 20px rgba(0,0,0,.45); }
.mv-nav:hover { transform: translateY(-50%) scale(1.08); }
@media (max-width: 900px) {
    .mv-nav { display: inline-flex; width: 42px; height: 42px; }
    .mv-nav.prev { left: 8px; }
    .mv-nav.next { right: 8px; }
}
/* Video thumbnail in chat (Telegram style) */
.video-thumb-wrap { position: relative; max-width: 260px; max-height: 240px; border-radius: 10px; overflow: hidden; background: #000; cursor: pointer; }
.video-thumb { display: block; width: 100%; height: auto; aspect-ratio: 16/9; object-fit: cover; opacity: 0.8; transition: opacity 0.2s; }
.video-thumb-wrap:hover .video-thumb { opacity: 0.95; }
.play-overlay { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; z-index: 2; pointer-events: none; }
.play-icon { width: 48px; height: 48px; background: rgba(0,0,0,0.5); border-radius: 50%; display: flex; align-items: center; justify-content: center; backdrop-filter: blur(4px); border: 1px solid rgba(255,255,255,0.2); }
.play-icon::after { content: ''; display: block; width: 0; height: 0; border-style: solid; border-width: 10px 0 10px 18px; border-color: transparent transparent transparent #fff; margin-left: 4px; }
.video-duration { position: absolute; bottom: 8px; right: 8px; background: rgba(0,0,0,0.6); color: #fff; font-size: 11px; padding: 2px 6px; border-radius: 6px; backdrop-filter: blur(4px); }

/* ============ Reply Feature (Session 46) ============ */
.reply-preview { display: flex; align-items: center; gap: 12px; padding: 8px 16px; background: hsl(var(--secondary) / 0.4); border-top: 1px solid hsl(var(--border) / 0.5); border-left: 4px solid hsl(var(--primary)); animation: slideUp .2s ease-out; }
.reply-preview.hidden { display: none; }
.rp-content { flex: 1; min-width: 0; }
.rp-name { font-size: 13px; font-weight: 600; color: hsl(var(--primary)); margin-bottom: 2px; }
.rp-text { font-size: 12px; color: hsl(var(--muted-foreground)); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.rp-close { background: none; border: none; color: hsl(var(--muted-foreground)); cursor: pointer; padding: 4px; font-size: 16px; }
.rp-close:hover { color: hsl(var(--foreground)); }

.reply-quote { background: hsl(var(--secondary) / 0.3); border-left: 3px solid hsl(var(--primary) / 0.7); padding: 6px 10px; border-radius: 6px; margin-bottom: 6px; cursor: pointer; transition: background .2s; }
.reply-quote:hover { background: hsl(var(--secondary) / 0.5); }
.rq-name { font-size: 12px; font-weight: 600; color: hsl(var(--primary)); margin-bottom: 2px; }
.rq-text { font-size: 11px; color: hsl(var(--muted-foreground)); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; opacity: 0.8; }

.msg-row[id] { scroll-margin-top: 80px; }
.msg-highlight { animation: highlightFlash 2s ease-out; }
@keyframes highlightFlash {
    0% { background: hsl(var(--primary) / 0.3); }
    100% { background: transparent; }
}
@keyframes slideUp {
    from { transform: translateY(100%); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

/* ================== Mobile Optimization (Session 57) ================== */
.bottom-nav {
    display: none;
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 60px;
    background: hsl(var(--card) / 0.95);
    border-top: 1px solid hsl(var(--border) / 0.6);
    backdrop-filter: blur(12px);
    z-index: 50;
    justify-content: space-around;
    align-items: center;
    padding: 0 10px;
}

.bn-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    color: hsl(var(--muted-foreground));
    gap: 4px;
    transition: all 0.2s;
    flex: 1;
}

.bn-item .lucide {
    width: 22px;
    height: 22px;
}

.bn-item span {
    font-size: 10px;
    font-weight: 500;
}

.bn-item.active {
    color: hsl(var(--primary));
}

/* Fix màu icon danh bạ mobile đồng nhất (Session 57) */
.bn-item[onclick*="contacts"],
.bn-item[onclick*="showContacts"] {
    color: hsl(var(--muted-foreground));
}
.bn-item[onclick*="contacts"].active,
.bn-item[onclick*="showContacts"].active {
    color: hsl(var(--primary));
}

.light .bn-item {
    color: hsl(var(--muted-foreground));
}
.light .bn-item.active {
    color: hsl(var(--primary));
}

.back-btn {
    display: none;
    background: none;
    border: none;
    padding: 8px;
    margin-right: 8px;
    border-radius: 50%;
    transition: background 0.2s;
}

.back-btn:hover {
    background: hsl(var(--secondary) / 0.6);
}

@media (max-width: 768px) {
    .app {
        flex-direction: column;
    }

    .sidebar {
        width: 100% !important;
        height: 100vh;
        border-right: none;
        padding-bottom: 60px; /* Cho bottom nav */
    }

    .bottom-nav {
        display: flex;
    }

    .chat-main {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        z-index: 100;
        background: hsl(var(--background));
        transform: translateX(100%);
        transition: transform 0.3s cubic-bezier(0.33, 1, 0.68, 1);
    }

    .chat-main.open {
        transform: translateX(0);
    }

    .back-btn {
        display: inline-flex;
    }

    .empty-chat {
        display: none;
    }

    .chat-header {
        padding: 8px 12px;
    }

    .compose {
        padding: 8px 12px 12px;
    }
}

/* ================== Call UI (Session 61) ================== */
.call-modal {
    width: 100%;
    max-width: 400px;
    background: hsl(var(--card));
    border-radius: 1.5rem;
    padding: 2rem;
    text-align: center;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    position: relative;
    overflow: hidden;
}

.call-header {
    margin-bottom: 2rem;
}

.call-header .avatar.large {
    width: 100px;
    height: 100px;
    margin: 0 auto 1rem;
    font-size: 2.5rem;
}

#callStatus {
    color: hsl(var(--muted-foreground));
    font-size: 0.875rem;
    margin-top: 0.5rem;
    animation: pulse 2s infinite;
}

.call-video-container {
    position: relative;
    width: 100%;
    aspect-ratio: 3/4;
    background: #000;
    border-radius: 1rem;
    margin-bottom: 2rem;
    overflow: hidden;
}

#remoteVideo {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

#localVideo {
    position: absolute;
    bottom: 1rem;
    right: 1rem;
    width: 100px;
    aspect-ratio: 3/4;
    background: #222;
    border-radius: 0.5rem;
    object-fit: cover;
    border: 2px solid hsl(var(--border));
}

.call-actions {
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.call-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    cursor: pointer;
    transition: transform 0.2s;
}

.call-btn:hover {
    transform: scale(1.1);
}

.call-btn.hangup {
    background: #ef4444;
}

.call-btn.answer {
    background: #22c55e;
    width: auto;
    border-radius: 2rem;
    padding: 0 1.5rem;
    color: #fff;
    font-weight: 600;
    gap: 0.5rem;
}

@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.5; }
    100% { opacity: 1; }
}

/* Session 77: View-only Badge (Chim mat do) */
.view-only-badge {
    position: fixed;
    top: 15px;
    right: 15px;
    z-index: 9999;
    width: 46px;
    height: 46px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: hsl(var(--card) / 0.85);
    backdrop-filter: blur(10px);
    border-radius: 50%;
    border: 2px solid hsl(var(--destructive) / 0.8);
    box-shadow: 0 0 15px hsl(var(--destructive) / 0.3);
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    cursor: pointer;
}
.view-only-badge:hover {
    transform: scale(1.1);
    box-shadow: 0 0 20px hsl(var(--destructive) / 0.5);
    background: hsl(var(--card));
}
.vo-link {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
}
.vo-bird {
    width: 34px;
    height: 34px;
    filter: brightness(0.9) contrast(1.1);
    transition: filter 0.3s;
}
/* Session 78: Hieu ung mat do (Red-eye) overlay */
.vo-eyes {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 34px;
    height: 34px;
    pointer-events: none;
    background: radial-gradient(circle at 38% 44%, #ff0000 2px, transparent 4px),
                radial-gradient(circle at 62% 44%, #ff0000 2px, transparent 4px);
    filter: blur(0.5px) drop-shadow(0 0 3px #ff0000);
    opacity: 0.9;
    animation: eyePulse 2s infinite ease-in-out;
}
@keyframes eyePulse {
    0%, 100% { opacity: 0.8; filter: blur(0.5px) drop-shadow(0 0 2px #ff0000); }
    50% { opacity: 1; filter: blur(0.4px) drop-shadow(0 0 5px #ff0000); }
}

@media (max-width: 768px) {
    .view-only-badge {
        top: 10px;
        right: 10px;
        width: 40px;
        height: 40px;
    }
    .vo-bird, .vo-eyes {
        width: 30px;
        height: 30px;
    }
}

/* Session 85: Inline file preview in compose bar */
.inline-file-preview {
    position: absolute;
    bottom: 100%;
    left: 16px;
    right: 16px;
    background: hsl(var(--card) / 0.9);
    backdrop-filter: blur(8px);
    border: 1px solid hsl(var(--border) / 0.5);
    border-bottom: none;
    border-radius: 12px 12px 0 0;
    padding: 8px 12px;
    display: flex;
    align-items: center;
    z-index: 10;
    animation: slideUp 0.2s ease-out;
}
.inline-tile {
    display: flex;
    align-items: center;
    gap: 8px;
    background: hsl(var(--secondary) / 0.5);
    padding: 4px 8px;
    border-radius: 8px;
    max-width: 100%;
}
.inline-tile img, .inline-tile video {
    width: 32px;
    height: 32px;
    object-fit: cover;
    border-radius: 4px;
}
.inline-name {
    font-size: 12px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 200px;
}
.inline-x {
    background: none;
    border: none;
    color: hsl(var(--destructive));
    cursor: pointer;
    font-size: 14px;
    padding: 0 4px;
}
.doc-icon { font-size: 20px; }

/* ============ Gallery Panel (Media/Files — Session 97) ============ */
.gallery-panel-wrap { position: fixed; top: 0; right: 0; height: 100vh; z-index: 1000; pointer-events: none; }
.gallery-panel { width: 0; background: hsl(var(--tg-bg-sidebar)); border-left: 1px solid hsl(var(--border) / 0.6); overflow: hidden; transition: width .3s cubic-bezier(.33,1,.68,1); display: flex; flex-direction: column; height: 100%; pointer-events: auto; box-shadow: -10px 0 30px rgba(0,0,0,0.2); }
.gallery-panel.open { width: 360px; animation: slideInRight 0.3s cubic-bezier(0.33, 1, 0.68, 1) forwards; }
.gp-inner { width: 360px; height: 100vh; overflow-y: auto; display: flex; flex-direction: column; }
.gp-head { display: flex; align-items: center; gap: 12px; padding: 12px 16px; border-bottom: 1px solid hsl(var(--border) / 0.5); position: sticky; top: 0; background: hsl(var(--tg-bg-sidebar)); z-index: 10; }
.gp-head h4 { font-size: 14px; font-weight: 600; flex: 1; }
.gp-head .back-btn { padding: 6px; border-radius: 50%; transition: background 0.2s; }
.gp-head .back-btn:hover { background: hsl(var(--tg-hover)); }

.gp-content { padding: 12px; flex: 1; }
.gp-day-group { margin-bottom: 18px; }
.gp-day-title { margin: 0 2px 8px; color: hsl(var(--muted-foreground)); font-size: 11px; font-weight: 700; text-transform: capitalize; letter-spacing: .02em; }
.gp-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 4px; }
.gp-item { position: relative; aspect-ratio: 1; border-radius: 6px; overflow: hidden; cursor: pointer; background: hsl(var(--muted) / 0.3); }
.gp-item img, .gp-item video { width: 100%; height: 100%; object-fit: cover; transition: transform 0.2s; }
.gp-source-btn { position: absolute; right: 5px; bottom: 5px; width: 27px; height: 27px; display: inline-flex; align-items: center; justify-content: center; border: 1px solid hsl(var(--primary) / .7); border-radius: 50%; background: hsl(var(--card) / .88); cursor: pointer; opacity: 0; transform: translateY(4px); transition: opacity .18s, transform .18s, background .18s; z-index: 2; }
.gp-item:hover .gp-source-btn, .gp-source-btn:focus-visible { opacity: 1; transform: translateY(0); }
.gp-source-btn:hover { background: hsl(var(--primary) / .22); }
.gp-source-btn .lucide { width: 14px; height: 14px; }
.gp-item:hover img, .gp-item:hover video { transform: scale(1.05); }

.gp-list { display: flex; flex-direction: column; gap: 8px; }
.gp-file-item { display: flex; align-items: center; gap: 12px; padding: 10px; border-radius: 12px; background: hsl(var(--secondary) / 0.4); border: 1px solid hsl(var(--border) / 0.3); text-decoration: none; color: inherit; transition: all 0.2s; }
.gp-file-item:hover { background: hsl(var(--tg-hover)); transform: translateY(-1px); border-color: hsl(var(--primary) / 0.5); }
.gp-file-icon { width: 40px; height: 40px; border-radius: 10px; background: hsl(var(--primary) / 0.1); display: flex; align-items: center; justify-content: center; font-size: 20px; flex-shrink: 0; }
.gp-file-info { flex: 1; min-width: 0; }
.gp-file-name { font-size: 13px; font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; display: block; }
.gp-file-meta { font-size: 11px; color: hsl(var(--muted-foreground)); margin-top: 2px; }
.gp-empty { text-align: center; padding: 40px 20px; color: hsl(var(--muted-foreground)); font-size: 13px; }

/* ============ Professional UI Animations (Session 99) ============ */
@keyframes slideInRight {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes slideInLeft {
    from { transform: translateX(-100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes slideInUp {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes scaleIn {
    from { transform: scale(0.95); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

@keyframes dropdownBounce {
    0% { transform: scale(0.9) translateY(-10px); opacity: 0; }
    70% { transform: scale(1.02) translateY(2px); opacity: 1; }
    100% { transform: scale(1) translateY(0); opacity: 1; }
}

@keyframes modalBgFade {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes modalContentIn {
    from { transform: scale(0.9) translateY(20px); opacity: 0; }
    to { transform: scale(1) translateY(0); opacity: 1; }
}

.ani-fade-in { animation: fadeIn 0.3s ease-out forwards; }
.ani-slide-right { animation: slideInRight 0.3s cubic-bezier(0.33, 1, 0.68, 1) forwards; }
.ani-slide-left { animation: slideInLeft 0.3s cubic-bezier(0.33, 1, 0.68, 1) forwards; }
.ani-slide-up { animation: slideInUp 0.3s ease-out forwards; }
.ani-scale-in { animation: scaleIn 0.2s cubic-bezier(0.34, 1.56, 0.64, 1) forwards; }
.ani-dropdown { animation: dropdownBounce 0.25s cubic-bezier(0.34, 1.56, 0.64, 1) forwards; }