/* ===== QQ Channel Dark Theme — 校园频道 ===== */

/* ── Tokens ─────────────────────────────────────── */
:root {
  color-scheme: dark;
  font-family: "Noto Sans SC", system-ui, -apple-system, sans-serif;

  /* Background layers */
  --bg-base:       #1a1b1e;
  --bg-deeper:     #111214;
  --bg-surface:    #232428;
  --bg-elevated:   #2c2d32;
  --bg-hover:      #3e3f47;
  --bg-active:     #4a4b55;
  --bg-input:      #383a40;
  --bg-overlay:    rgba(0,0,0,0.55);
  --bg-card:       #2b2d31;

  /* Text */
  --text:          #f2f3f5;
  --text-sec:      #b5bac1;
  --text-dim:      #80848e;
  --text-muted:    #5c5e66;
  --text-link:     #a78bfa;
  --text-mention:  #f0b232;

  /* Accent (brand) */
  --accent:        #7c5cfc;
  --accent-hover:  #6a4ae8;
  --accent-active: #5939d4;
  --accent-light:  #a78bfa;
  --accent-g:      rgba(124,92,252,0.20);
  --accent-soft:   rgba(124,92,252,0.08);

  /* Semantic colors */
  --red:           #ed4245;
  --red-bg:        rgba(237,66,69,0.12);
  --green:         #23a559;
  --green-bg:      rgba(35,165,89,0.12);
  --yellow:        #f0b232;
  --yellow-bg:     rgba(240,178,50,0.12);
  --pink:          #ff6b8a;
  --orange:        #fa8c16;
  --orange-bg:     rgba(250,140,22,0.12);
  --blue:          #5865f2;
  --blue-bg:       rgba(88,101,242,0.12);
  --cyan:          #00b4d8;

  /* Borders & radii */
  --border:        rgba(255,255,255,0.06);
  --border-light:  rgba(255,255,255,0.10);
  --border-active: rgba(255,255,255,0.18);
  --border-focus:  var(--accent);
  --r-xs:          4px;
  --r:             8px;
  --r-md:          12px;
  --r-lg:          16px;
  --r-xl:          24px;

  /* Shadows */
  --sh-sm:        0 4px 12px rgba(0,0,0,0.28);
  --sh:           0 8px 24px rgba(0,0,0,0.30);
  --sh-lg:        0 16px 48px rgba(0,0,0,0.40);
  --sh-card:      0 4px 12px rgba(0,0,0,0.35);

  /* Transitions */
  --t:            0.18s ease;
  --t-spring:     0.4s cubic-bezier(.34,1.56,.64,1);
  --t-smooth:     0.3s cubic-bezier(0.4,0,0.2,1);

  /* Spacing Scale */
  --sp-1:  4px;
  --sp-2:  8px;
  --sp-3:  12px;
  --sp-4:  16px;
  --sp-5:  20px;
  --sp-6:  24px;
  --sp-8:  32px;
  --sp-10: 40px;
  --sp-12: 48px;

  /* Typography Scale */
  --text-xs:   0.75rem;    /* 12px */
  --text-sm:   0.875rem;   /* 14px */
  --text-base: 1rem;       /* 16px */
  --text-lg:   1.125rem;   /* 18px */
  --text-xl:   1.25rem;    /* 20px */
  --text-2xl:  1.5rem;     /* 24px */
  --text-3xl:  1.875rem;   /* 30px */
}

/* ── Reset ──────────────────────────────────────── */
*,*::before,*::after { box-sizing:border-box; margin:0; padding:0; }
html { scroll-behavior:smooth; }
body {
  margin:0;
  background:#020412;
  color:var(--text);
  line-height:1.5;
  overflow:hidden;
  height:100vh;
  -webkit-font-smoothing:antialiased;
}
a { color:var(--text-link); text-decoration:none; }
a:hover { color:#c4b5fd; }
img { display:block; max-width:100%; }
button {
  cursor:pointer; font-family:inherit; border:none;
  background:none; color:inherit;
}
input,textarea { font-family:inherit; }
.view { display:none; }
.view.active { display:block; }

/* ── Login Background Layers ────────────────────── */
#school-bg {
  position:fixed; inset:0; z-index:0;
  background:url('images/school-night.jpg') center/cover no-repeat;
  filter:brightness(0.62) saturate(0.88) contrast(1.08);
  transform:scale(1.0);
}
#school-glow {
  position:fixed; inset:0; z-index:1; pointer-events:none;
  background:
    radial-gradient(ellipse 80% 15% at 50% 92%, rgba(255,180,120,0.25) 0%, rgba(255,140,80,0.12) 25%, rgba(255,100,50,0.04) 50%, transparent 70%),
    linear-gradient(to top, rgba(255,200,150,0.10) 0%, rgba(20,25,50,0.03) 40%, transparent 65%),
    linear-gradient(to bottom, rgba(2,4,18,0.35) 0%, transparent 30%);
}
#stars-canvas {
  position:fixed; inset:0; z-index:4; width:100vw; height:100vh; pointer-events:none;
}
.vignette-overlay {
  position:fixed; inset:0; z-index:2; pointer-events:none;
  background:radial-gradient(ellipse at 50% 50%, transparent 50%, rgba(2,4,14,0.25) 75%, rgba(0,0,0,0.50) 95%);
}
.grain-overlay {
  position:fixed; inset:0; z-index:2; pointer-events:none; opacity:0.02;
  background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 512 512' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
body.main-active #school-bg,
body.main-active #school-glow,
body.main-active #stars-canvas,
body.main-active .vignette-overlay,
body.main-active .grain-overlay { display:none; }

/* Main BG */
#main-bg {
  display:none; position:fixed; inset:0; z-index:0; pointer-events:none;
  background:
    radial-gradient(ellipse 60% 50% at 30% 20%, rgba(60,70,120,0.12), transparent 70%),
    radial-gradient(ellipse 50% 40% at 70% 60%, rgba(80,60,140,0.08), transparent 70%),
    radial-gradient(ellipse 70% 30% at 50% 90%, rgba(40,50,90,0.15), transparent 60%),
    linear-gradient(180deg, #0a0c1a 0%, #0e1025 40%, #0d0f22 100%);
}
body.main-active #main-bg { display:block; }

#main-dots {
  display:none; position:fixed; inset:0; z-index:1; pointer-events:none;
}
body.main-active #main-dots { display:block; }

/* ══════════════════════════════════════════════════
   LOGIN PAGE (保留现有登录样式)
   ══════════════════════════════════════════════════ */
.login-page {
  display:grid; grid-template-columns:1fr 1fr; min-height:100vh;
  background:transparent; position:relative; z-index:3;
}
.login-left {
  background:transparent; display:flex; align-items:center;
  justify-content:center; overflow:visible; position:relative;
}
.login-left-inner {
  position:relative; width:100%; height:100%;
  display:flex; justify-content:center; align-items:center;
}
.login-right {
  display:flex; align-items:center; justify-content:center;
  padding:40px; position:relative; background:transparent; overflow:hidden;
}
.login-right::before,.login-right::after { content:none; background:none; }

/* Login Entry */
.login-entry {
  display:flex; flex-direction:column; align-items:center;
  justify-content:center; text-align:center; z-index:2;
  max-width:420px; width:100%;
  animation:entryFadeIn 1s ease;
}
@keyframes entryFadeIn {
  from { opacity:0; transform:translateY(20px); }
  to   { opacity:1; transform:translateY(0); }
}
.login-logo {
  display:flex; justify-content:center; margin-bottom:28px; position:relative;
}
.login-logo::before {
  content:""; position:absolute; width:180px; height:180px; border-radius:50%;
  background:radial-gradient(circle,rgba(124,92,252,0.3),transparent 70%);
  top:50%; left:50%; transform:translate(-50%,-50%);
  animation:logoGlow 3s ease-in-out infinite;
}
@keyframes logoGlow {
  0%,100% { transform:translate(-50%,-50%) scale(1); opacity:0.6; }
  50%     { transform:translate(-50%,-50%) scale(1.25); opacity:1; }
}
.login-badge {
  width:160px; height:160px; object-fit:cover; object-position:center;
  border:3px solid rgba(124,92,252,0.6);
  box-shadow:0 0 30px rgba(124,92,252,0.35),0 0 60px rgba(124,92,252,0.15);
  display:block; position:relative; z-index:1;
  transition:transform 0.4s cubic-bezier(.34,1.56,.64,1), box-shadow 0.3s ease;
  border-radius:50%;
}
.login-badge:hover {
  transform:scale(1.08) rotate(2deg);
  box-shadow:0 0 40px rgba(124,92,252,0.5),0 0 80px rgba(124,92,252,0.25);
}
.login-school-name {
  font-size:2.6rem; font-weight:900;
  background:linear-gradient(135deg,#e8e0ff,#a78bfa,#ff6b8a,#fbbf24);
  background-size:300% 300%;
  -webkit-background-clip:text; -webkit-text-fill-color:transparent;
  background-clip:text; animation:nameShimmer 5s ease-in-out infinite;
  margin:0 0 6px; letter-spacing:1px;
}
@keyframes nameShimmer {
  0%,100% { background-position:0% 50%; }
  50%     { background-position:100% 50%; }
}
.login-motto {
  font-size:1.05rem; color:rgba(210,215,230,0.75);
  margin:0 0 40px; letter-spacing:1.5px; font-weight:300;
}

/* ── Sign In / Up Buttons ──────────────────────── */
.login-actions {
  display:flex; gap:18px; margin-bottom:36px;
}
.btn-signin, .btn-signup {
  padding:14px 44px; border-radius:50px; font-size:1rem; font-weight:700;
  letter-spacing:2px; cursor:pointer;
  transition:all 0.35s cubic-bezier(.34,1.56,.64,1);
  position:relative; overflow:hidden;
}
.btn-signin {
  background:linear-gradient(135deg,#7c5cfc,#6366f1);
  color:#fff; border:none; box-shadow:0 4px 20px rgba(124,92,252,0.4);
}
.btn-signin:hover {
  transform:translateY(-3px) scale(1.04);
  box-shadow:0 8px 35px rgba(124,92,252,0.55);
}
.btn-signup {
  background:transparent; color:#e8e0ff;
  border:2px solid rgba(255,255,255,0.25); backdrop-filter:blur(8px);
}
.btn-signup:hover {
  border-color:#ff6b8a; color:#ff6b8a;
  transform:translateY(-3px) scale(1.04);
  box-shadow:0 8px 35px rgba(255,107,138,0.25);
}
.login-typewriter {
  min-height:28px; display:flex; align-items:center; gap:2px;
}
.tw-text {
  font-size:0.95rem; color:rgba(200,210,230,0.7);
  font-weight:400; letter-spacing:1px;
}
.tw-cursor {
  font-size:1.1rem; font-weight:300; color:#a78bfa;
  animation:twBlink 0.7s step-end infinite;
}
@keyframes twBlink { 0%,100%{opacity:1} 50%{opacity:0} }

/* ── Login Modal（动画由 anime.js 驱动，见 js/app.js）── */
.login-modal-overlay {
  position:fixed; inset:0; z-index:100;
  display:flex; align-items:center; justify-content:center;
  background:rgba(0,0,0,0.6); backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  opacity:0; pointer-events:none;
}
.login-modal-overlay.active { pointer-events:auto; }
.login-card-modal {
  opacity:0;
  will-change:transform, opacity;
}
.login-card {
  width:min(420px,100%); text-align:center; position:relative; z-index:1;
  padding:44px 36px 36px;
  background:rgba(8,10,20,0.55);
  border-radius:var(--r-xl);
  backdrop-filter:blur(28px); -webkit-backdrop-filter:blur(28px);
  box-shadow:0 4px 32px rgba(0,0,0,0.5), inset 0 1px 0 rgba(255,255,255,0.1),
             0 0 0 1px rgba(255,255,255,0.06);
  border:1px solid rgba(255,255,255,0.08);
}
.login-card h2 {
  margin:0 0 6px; font-size:1.8rem; font-weight:900;
  background:linear-gradient(135deg,#e8e0ff,var(--accent-light),var(--pink));
  background-size:200% 200%;
  -webkit-background-clip:text; -webkit-text-fill-color:transparent;
  background-clip:text; animation:textShimmer 4s ease-in-out infinite;
}
@keyframes textShimmer {
  0%,100% { background-position:0% 50%; }
  50%     { background-position:100% 50%; }
}
.login-sub { margin:0 0 36px; color:var(--text-sec); font-size:0.9rem; letter-spacing:0.5px; }
.modal-close {
  position:absolute; top:16px; right:16px; width:32px; height:32px; border-radius:50%;
  display:flex; align-items:center; justify-content:center;
  background:rgba(255,255,255,0.08); color:var(--text-dim);
  cursor:pointer; z-index:5; transition:all 0.2s ease; border:none;
}
.modal-close:hover { background:rgba(255,255,255,0.16); color:var(--text); transform:rotate(90deg); }
.input-group { margin-bottom:22px; text-align:left; }
.input-label {
  display:block; font-size:0.82rem; font-weight:600;
  color:var(--accent-light); margin-bottom:8px;
  text-transform:uppercase; letter-spacing:1px;
}
.input-wrapper {
  position:relative; display:flex; align-items:center;
  border-radius:var(--r-md); background:rgba(255,255,255,0.08);
  border:1.5px solid rgba(255,255,255,0.15);
  transition:border-color var(--t), box-shadow var(--t), background var(--t);
}
.input-wrapper:focus-within {
  border-color:var(--accent); box-shadow:0 0 0 3px var(--accent-g),0 4px 16px rgba(124,92,252,0.1);
}
.input-icon {
  position:absolute; left:14px; width:18px; height:18px;
  color:var(--text-dim); pointer-events:none; transition:color var(--t); z-index:1;
}
.login-card input:not([type="checkbox"]):not([type="radio"]):not([type="file"]):not([type="submit"]) {
  width:100%; padding:15px 46px 15px 46px; border-radius:var(--r-md);
  border:none; background:transparent; color:var(--text);
  font-size:1rem; outline:none;
}
.login-card input::placeholder { color:var(--text-muted); font-weight:400; }
.input-hint {
  margin:8px 0 -8px 2px; font-size:0.8rem; color:var(--text-dim);
  line-height:1.3; transition:color .2s;
}
.input-hint.ok { color:#4ade80; }
.input-hint.warn { color:#fbbf24; }
.input-hint.err { color:var(--pink); }
.toggle-pw {
  position:absolute; right:12px; background:none; border:none;
  color:var(--text-dim); padding:4px; display:flex; align-items:center;
  transition:color var(--t);
}
.toggle-pw:hover { color:var(--text); }
.login-extras {
  display:flex; justify-content:space-between; align-items:center;
  margin:4px 0 28px; color:var(--text-dim); font-size:0.83rem;
}
.checkbox-label { display:flex; align-items:center; gap:8px; cursor:pointer; transition:color var(--t); }
.checkbox-label input[type="checkbox"] { accent-color:var(--accent); width:16px; height:16px; }
.btn-login {
  width:100%; padding:16px; border:none; border-radius:var(--r-md);
  background:linear-gradient(135deg,#7c5cfc,#6366f1,#ec4899);
  background-size:200% 200%; color:#fff; font-size:1.05rem; font-weight:700;
  position:relative; overflow:hidden;
  transition:transform var(--t), box-shadow var(--t), background-position 0.5s ease;
  letter-spacing:2px; cursor:pointer;
}
.btn-login:hover {
  transform:translateY(-2px);
  box-shadow:0 10px 35px rgba(124,92,252,0.4),0 4px 15px rgba(236,72,153,0.2);
  background-position:100% 0;
}
.login-error { min-height:22px; margin-top:16px; color:var(--pink); font-weight:600; font-size:0.9rem; }
.login-retry { display:inline-flex; align-items:center; justify-content:center; margin-top:10px; padding:8px 18px; border:1px solid rgba(124,92,252,0.5); border-radius:999px; background:transparent; color:var(--text); font-size:0.85rem; cursor:pointer; transition:background .2s, border-color .2s; }
.login-retry:hover { background:rgba(124,92,252,0.15); border-color:var(--primary); }


/* ══════════════════════════════════════════════════
   CHARACTERS (geometric login characters)
   ══════════════════════════════════════════════════ */

/* ══════════════════════════════════════════════════
   APP SHELL — QQ Channel Style (Three-panel layout)
   ══════════════════════════════════════════════════ */
.app-shell {
  display:flex;
  height:100vh;
  position:relative;
  z-index:3;
}

/* ══════════════════════════════════════════════════
   LEFT SIDEBAR — QQ Channel Navigation
   ══════════════════════════════════════════════════ */
.sidebar {
  width:260px;
  min-width:260px;
  background:var(--bg-surface);
  border-right:1px solid var(--border);
  display:flex;
  flex-direction:column;
  overflow:hidden;
}

/* Server header */
.sidebar-server {
  padding:14px 16px;
  display:flex;
  align-items:center;
  gap:12px;
  border-bottom:1px solid var(--border);
  cursor:pointer;
  transition:background var(--t);
  flex-shrink:0;
  position:relative;
}
.sidebar-server:hover { background:var(--bg-hover); }
.sidebar-server.active { background:var(--bg-active); }
.sidebar-server.active .server-title { color:var(--accent-light); }
.sidebar-server::after {
  content:'';
  position:absolute;
  right:16px;
  top:50%;
  transform:translateY(-50%);
  border:4px solid transparent;
  border-top-color:var(--text-dim);
  transition:transform var(--t);
}
.server-icon {
  width:40px; height:40px; border-radius:var(--r-md);
  background:linear-gradient(135deg,var(--accent),var(--pink));
  display:flex; align-items:center; justify-content:center;
  font-size:1.1rem; font-weight:800; color:#fff;
  flex-shrink:0; overflow:hidden;
}
.server-icon img { width:100%; height:100%; object-fit:cover; }
.server-title {
  font-size:0.95rem; font-weight:700;
  white-space:nowrap; overflow:hidden; text-overflow:ellipsis;
}

/* Server list in mini mode */
.sidebar-servers {
  width:68px; min-width:68px;
  background:var(--bg-deeper);
  display:flex; flex-direction:column;
  align-items:center; padding:12px 0; gap:8px;
  overflow-y:auto; border-right:1px solid var(--border);
}
.server-pill {
  width:48px; height:48px; border-radius:24px;
  background:var(--bg-elevated);
  display:flex; align-items:center; justify-content:center;
  cursor:pointer; transition:all var(--t);
  font-size:1.2rem; position:relative;
  flex-shrink:0;
}
.server-pill:hover, .server-pill.active { border-radius:14px; background:var(--accent); }
.server-pill.active::before {
  content:''; position:absolute; left:-8px; top:50%;
  transform:translateY(-50%);
  width:4px; height:20px; border-radius:4px; background:var(--text);
}
.server-pill img { width:48px; height:48px; border-radius:inherit; object-fit:cover; }

/* Channel search */
.ch-search {
  padding:8px 12px; flex-shrink:0;
}
.ch-search-input {
  width:100%; padding:6px 10px; border-radius:var(--r);
  background:var(--bg-deeper); border:none; color:var(--text);
  font-size:0.82rem; outline:none;
}
.ch-search-input::placeholder { color:var(--text-muted); }

/* Channel navigation scroll area */
.sidebar-channels {
  flex:1;
  overflow-y:auto;
  padding:8px 6px;
  scrollbar-width:thin;
  scrollbar-color:var(--bg-hover) transparent;
  margin-top:2px;
}

/* Channel category */
.ch-category { margin-bottom:2px; }
.ch-category-title {
  display:flex;
  align-items:center;
  gap:2px;
  padding:6px 8px 4px;
  font-size:0.80rem;
  font-weight:700;
  color:var(--text-dim);
  text-transform:uppercase;
  letter-spacing:0.5px;
  cursor:pointer;
  transition:color var(--t);
  user-select:none;
  position:relative;
}
.ch-category-title:hover { color:var(--text-sec); }
.ch-category-title svg {
  width:10px; height:10px; transition:transform 0.2s ease;
  flex-shrink:0;
}
.ch-category-title.collapsed svg { transform:rotate(-90deg); }
.ch-category-title .cat-add {
  margin-left:auto; opacity:0; transition:opacity var(--t);
  width:18px; height:18px; border-radius:var(--r);
  display:flex; align-items:center; justify-content:center; color:var(--text-muted);
}
.ch-category-title:hover .cat-add { opacity:1; }
.ch-category-title .cat-add:hover { background:var(--bg-hover); color:var(--text); }

/* Channel items */
.ch-item {
  display:flex;
  align-items:center;
  gap:8px;
  padding:7px 10px;
  border-radius:var(--r);
  cursor:pointer;
  transition:background var(--t), color var(--t);
  font-size:0.94rem;
  color:var(--text-dim);
  position:relative;
  margin:1px 0;
}
.ch-item:hover {
  background:var(--bg-hover);
  color:var(--text-sec);
}
.ch-item.active {
  background:var(--bg-active);
  color:var(--text);
}
.ch-item .ch-icon {
  font-size:1.0rem;
  opacity:0.7;
  flex-shrink:0;
  width:20px;
  text-align:center;
}
.ch-item.active .ch-icon { opacity:1; }
.ch-item .ch-name {
  flex:1;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}

/* Unread badge */
.ch-badge {
  margin-left:auto;
  background:var(--red);
  color:#fff;
  font-size:0.70rem;
  font-weight:700;
  padding:1px 6px;
  border-radius:8px;
  min-width:18px;
  text-align:center;
}

/* Unread indicator (left dot) */
.ch-item .ch-unread-dot {
  display:none;
  position:absolute; left:-4px; top:50%;
  transform:translateY(-50%);
  width:4px; height:4px; border-radius:50%; background:var(--accent);
}

/* Voice channel indicator */
.ch-item.ch-voice .ch-icon { color:var(--green); }
.ch-item.ch-voice::after {
  content:'';
  width:6px; height:6px; border-radius:50%;
  background:var(--green);
  margin-left:auto;
  flex-shrink:0;
  animation:voicePulse 2s ease-in-out infinite;
}
@keyframes voicePulse {
  0%,100% { opacity:0.3; }
  50%     { opacity:1; }
}
.ch-live-count {
  font-size:0.65rem; color:var(--green);
  margin-left:2px; flex-shrink:0;
}

/* Lock icon for restricted channels */
.ch-locked {
  opacity:0.4;
}

/* ── Sidebar user panel ─────────────────────────── */
.sidebar-user {
  padding:10px 12px;
  display:flex;
  align-items:center;
  gap:10px;
  border-top:1px solid var(--border);
  background:var(--bg-deeper);
  flex-shrink:0;
  margin-top:auto;
}
.user-avatar {
  width:34px; height:34px; border-radius:50%;
  position:relative; flex-shrink:0;
  display:flex; align-items:center; justify-content:center;
  font-size:0.8rem; font-weight:700; color:#fff;
}
.user-avatar .status-dot {
  position:absolute; bottom:-1px; right:-1px;
  width:11px; height:11px; border-radius:50%;
  border:2.5px solid var(--bg-deeper);
}
.user-info { flex:1; min-width:0; }
.user-name { font-size:0.85rem; font-weight:600; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.user-tag { font-size:0.72rem; color:var(--text-dim); display:flex; align-items:center; gap:4px; }
.user-tag .role-badge { font-size:0.60rem; padding:1px 5px; border-radius:4px; font-weight:600; }
.user-actions { display:flex; gap:2px; }
.icon-btn {
  width:36px; height:36px; border-radius:var(--r);
  display:flex; align-items:center; justify-content:center;
  color:var(--text-dim); transition:background var(--t), color var(--t);
  background:none; border:none; cursor:pointer;
}
.icon-btn:hover { background:var(--bg-hover); color:var(--text); }
.icon-btn:active { transform:scale(0.92); transition:transform 0.05s ease; }
.icon-btn:disabled { opacity:0.45; cursor:not-allowed; }
/* Key action buttons — larger touch target */
.send-btn,
.attach-btn,
.emoji-btn {
  width:40px; height:40px;
}

/* ══════════════════════════════════════════════════
   CHANNEL MAIN — Middle Content Area
   ══════════════════════════════════════════════════ */
.channel-main {
  flex:1;
  display:flex;
  flex-direction:column;
  min-width:0;
  overflow:hidden;
  position:relative;
}

/* ── Channel header ─────────────────────────────── */
.channel-header {
  height:48px;
  padding:0 16px;
  display:flex;
  align-items:center;
  gap:12px;
  border-bottom:1px solid var(--border);
  flex-shrink:0;
  background:rgba(44,45,50,0.85);
  backdrop-filter:blur(8px);
}
.channel-header-left {
  display:flex;
  align-items:center;
  gap:8px;
  flex:1;
  min-width:0;
}
.mobile-menu-btn {
  display:none;
  padding:4px;
  background:none; border:none; color:var(--text-dim); cursor:pointer;
}
.channel-hash {
  font-size:1.3rem; font-weight:400; color:var(--text-muted); flex-shrink:0;
}
.channel-title {
  font-size:1rem; font-weight:700;
  white-space:nowrap; overflow:hidden; text-overflow:ellipsis;
}
.channel-divider {
  width:1px; height:24px; background:var(--border); flex-shrink:0;
}
.channel-desc {
  font-size:0.86rem; color:var(--text-dim);
  flex:1; white-space:nowrap; overflow:hidden; text-overflow:ellipsis;
}
.channel-header-right {
  display:flex;
  gap:4px;
  flex-shrink:0;
}

/* ── Pinned messages bar ────────────────────────── */
.pin-bar {
  padding:8px 16px;
  background:rgba(240,178,50,0.06);
  border-bottom:1px solid rgba(240,178,50,0.12);
  display:none;
  align-items:center;
  gap:10px;
  font-size:0.82rem;
  flex-shrink:0;
  cursor:pointer;
  transition:background var(--t);
}
.pin-bar:hover { background:rgba(240,178,50,0.10); }
.pin-bar.visible { display:flex; }
.pin-bar .pin-icon { color:var(--yellow); flex-shrink:0; }
.pin-bar .pin-text {
  flex:1; white-space:nowrap; overflow:hidden; text-overflow:ellipsis;
  color:var(--text-sec);
}
.pin-bar .pin-count {
  font-size:0.75rem; color:var(--text-link);
  flex-shrink:0;
}

/* ── Announcement banner ────────────────────────── */
.announcement-banner {
  margin:0 16px 8px; padding:12px 16px;
  background:var(--accent-soft);
  border:1px solid rgba(124,92,252,0.15);
  border-radius:var(--r-md);
  display:none;
  align-items:flex-start;
  gap:10px;
  flex-shrink:0;
}
.announcement-banner.visible { display:flex; }
.announcement-banner .ann-icon { font-size:1.1rem; flex-shrink:0; color:var(--accent); }
.announcement-banner .ann-content { flex:1; font-size:0.85rem; color:var(--text-sec); }
.announcement-banner .ann-close {
  flex-shrink:0; opacity:0.5; cursor:pointer;
  transition:opacity var(--t);
}
.announcement-banner .ann-close:hover { opacity:1; }

/* ── Messages area ──────────────────────────────── */
.messages-area {
  flex:1;
  overflow-y:auto;
  padding:8px 16px 4px;
  display:flex;
  flex-direction:column;
  gap:1px;
  scrollbar-width:thin;
  scrollbar-color:var(--bg-hover) transparent;
}

/* Welcome card */
.welcome-card {
  margin:12px 0 4px;
  padding:24px 28px;
  background:linear-gradient(135deg,rgba(124,92,252,0.08),rgba(255,107,138,0.05),var(--bg-elevated));
  border-radius:var(--r-lg);
  border:1px solid var(--border);
  position:relative;
  overflow:hidden;
}
.welcome-card::before {
  content:""; position:absolute; top:-50%; right:-20%;
  width:200px; height:200px;
  background:radial-gradient(circle,var(--accent-g),transparent 70%);
  border-radius:50%; pointer-events:none;
}
.welcome-card h3 { font-size:1.3rem; font-weight:800; margin-bottom:8px; position:relative; }
.welcome-card p { font-size:0.9rem; color:var(--text-sec); position:relative; }

/* Day divider */
.day-divider {
  display:flex; align-items:center; gap:12px;
  padding:12px 0 6px; margin:0;
}
.day-divider::before, .day-divider::after {
  content:""; flex:1; height:1px; background:var(--border);
}
.day-divider span {
  font-size:0.72rem; font-weight:600; color:var(--text-muted);
  white-space:nowrap;
}

/* Message group */
.msg-group {
  display:flex;
  gap:12px;
  padding:3px 0;
  position:relative;
  transition:background var(--t);
  border-radius:4px;
  padding-left:4px;
  padding-right:4px;
}
.msg-group:hover { background:rgba(255,255,255,0.015); }

/* Message hover actions (appear on hover) */
.msg-hover-actions {
  position:absolute; right:8px; top:4px;
  display:flex; gap:2px; opacity:0;
  transition:opacity var(--t); z-index:5;
}
.msg-group:hover .msg-hover-actions { opacity:1; }
.msg-hover-btn {
  width:26px; height:26px; border-radius:var(--r);
  display:flex; align-items:center; justify-content:center;
  background:var(--bg-elevated); border:1px solid var(--border);
  color:var(--text-dim); cursor:pointer;
  font-size:0.8rem; transition:all var(--t);
}
.msg-hover-btn:hover { background:var(--bg-hover); color:var(--text); border-color:var(--border-light); }

/* Message avatar */
.msg-avatar {
  width:40px; height:40px; border-radius:50%;
  flex-shrink:0;
  display:flex; align-items:center; justify-content:center;
  font-size:0.85rem; font-weight:700; color:#fff;
  margin-top:2px;
  position:relative;
}

/* Message body */
.msg-body { flex:1; min-width:0; }

/* Message header (author + tag + time) */
.msg-header {
  display:flex;
  align-items:baseline;
  gap:8px;
  margin-bottom:1px;
  flex-wrap:wrap;
}
.msg-author {
  font-size:0.92rem;
  font-weight:600;
  cursor:pointer;
  color:var(--text);
  transition:color var(--t);
}
.msg-author:hover { text-decoration:underline; color:var(--accent-light); }
.msg-time {
  font-size:0.72rem;
  color:var(--text-muted);
}
.msg-status {
  font-size:0.72rem;
  margin-left:4px;
  opacity:0.8;
}
.msg-pending { opacity:0.7; }
.msg-pending .msg-status { color:var(--accent-light); }
.msg-failed { opacity:1; }
.msg-failed .msg-content { border:1px dashed rgba(239,68,68,0.5); border-radius:var(--r); padding:5px 8px; background:rgba(239,68,68,0.06); }
.msg-failed .msg-status { color:#ff6b6b; cursor:pointer; text-decoration:underline; }
.msg-tag {
  font-size:0.68rem;
  padding:1px 6px;
  border-radius:4px;
  font-weight:600;
  text-transform:uppercase;
  letter-spacing:0.5px;
  flex-shrink:0;
}
.msg-tag.announcement {
  background:var(--accent-soft); color:var(--accent-light);
}
.msg-tag.notice {
  background:rgba(88,101,242,0.15); color:var(--blue);
}
.msg-tag.pin {
  background:var(--yellow-bg); color:var(--yellow);
}

/* Message content */
.msg-content {
  font-size:1rem;
  color:var(--text-sec);
  line-height:1.7;
  word-wrap:break-word;
  white-space:pre-wrap;
}
.msg-content a { color:var(--text-link); }
.msg-content a:hover { text-decoration:underline; }
.msg-content strong { color:var(--text); font-weight:700; }
.msg-content code {
  background:rgba(255,255,255,0.06);
  padding:1px 5px; border-radius:4px;
  font-size:0.85rem;
}

/* ── Image message ─────────────────────────── */
.msg-img-wrap {
  margin-top:4px;
  cursor:pointer;
  border-radius:var(--r);
  overflow:hidden;
  display:inline-block;
  max-width:360px;
  border:1px solid var(--border);
  transition:transform var(--t), box-shadow var(--t);
}
.msg-img-wrap:hover {
  transform:scale(1.02);
  box-shadow:0 4px 16px rgba(0,0,0,0.3);
}
.msg-img-wrap img {
  display:block;
  width:100%;
  height:auto;
  max-height:280px;
  object-fit:cover;
}
.msg-file-broken {
  padding:20px 32px;
  color:var(--text-muted);
  font-size:0.85rem;
}

/* ── File message card ────────────────────── */
.msg-file-card {
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:10px 14px;
  margin-top:4px;
  background:var(--bg-elevated);
  border:1px solid var(--border);
  border-radius:var(--r);
  max-width:280px;
}
.msg-file-icon {
  font-size:1.4rem;
  flex-shrink:0;
}
.msg-file-info {
  min-width:0;
  display:flex;
  flex-direction:column;
}
.msg-file-name {
  font-size:0.88rem;
  color:var(--text-link);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.msg-file-name:hover { text-decoration:underline; }
.msg-file-size {
  font-size:0.72rem;
  color:var(--text-muted);
}

/* ── Image lightbox ───────────────────────── */
.img-lightbox {
  position:fixed; top:0; left:0; width:100%; height:100%;
  z-index:9999;
  display:flex; align-items:center; justify-content:center;
  animation:fadeIn 0.2s ease;
}
@keyframes fadeIn { from{opacity:0} to{opacity:1} }
.img-lightbox-bg {
  position:absolute; top:0; left:0; width:100%; height:100%;
  background:rgba(0,0,0,0.85);
  backdrop-filter:blur(8px);
}
.img-lightbox-img {
  position:relative;
  max-width:90vw; max-height:90vh;
  border-radius:var(--r);
  box-shadow:0 8px 48px rgba(0,0,0,0.5);
}
.img-lightbox-close {
  position:absolute; top:16px; right:16px;
  width:40px; height:40px;
  background:rgba(255,255,255,0.1);
  border:none; border-radius:50%;
  color:#fff; font-size:1.5rem;
  cursor:pointer;
  transition:background var(--t);
  z-index:1;
  line-height:1;
}
.img-lightbox-close:hover { background:rgba(255,255,255,0.2); }

/* ── Upload toast ─────────────────────────── */
.upload-toast {
  position:fixed; top:16px; left:50%;
  transform:translateX(-50%);
  z-index:9998;
  padding:10px 24px;
  border-radius:var(--r-md);
  font-size:0.88rem;
  animation:fadeIn 0.2s ease;
  box-shadow:0 4px 16px rgba(0,0,0,0.4);
  max-width:calc(100vw - 32px);
  text-align:center;
  word-break:break-word;
}
.upload-toast-info  { background:var(--bg-elevated); color:var(--text-sec); border:1px solid var(--border); }
.upload-toast-error { background:rgba(237,66,69,0.15); color:var(--red); border:1px solid rgba(237,66,69,0.3); }
.upload-toast-success { background:rgba(35,165,89,0.15); color:var(--green); border:1px solid rgba(35,165,89,0.3); }

/* ── Notification bell ─────────────────────── */
.notify-wrap {
  position:relative;
}
.notify-badge {
  position:absolute; top:-2px; right:-4px;
  min-width:16px; height:16px;
  background:var(--red);
  color:#fff;
  font-size:0.65rem; font-weight:700;
  border-radius:8px;
  display:flex; align-items:center; justify-content:center;
  padding:0 4px;
  line-height:1;
  pointer-events:none;
}
.notify-dropdown {
  position:absolute; top:calc(100% + 8px); right:0;
  width:320px;
  max-height:400px;
  background:var(--bg-elevated);
  border:1px solid var(--border);
  border-radius:var(--r-md);
  box-shadow:0 8px 32px rgba(0,0,0,0.4);
  z-index:100;
  overflow:hidden;
  display:flex; flex-direction:column;
}
.notify-header {
  display:flex; align-items:center; justify-content:space-between;
  padding:12px 16px;
  border-bottom:1px solid var(--border);
  font-weight:700; font-size:0.92rem;
}
.notify-mark-all {
  background:none; border:none;
  color:var(--text-link); font-size:0.78rem;
  cursor:pointer;
}
.notify-mark-all:hover { text-decoration:underline; }
.notify-list {
  flex:1;
  overflow-y:auto;
  padding:4px 0;
}
.notify-item {
  display:flex; gap:10px;
  padding:10px 16px;
  cursor:pointer;
  transition:background var(--t);
  border-left:3px solid transparent;
}
.notify-item:hover { background:var(--bg-hover); }
.notify-item.unread {
  background:var(--accent-soft);
  border-left-color:var(--accent);
}
.notify-item .notify-icon {
  font-size:1.2rem; flex-shrink:0; margin-top:2px;
}
.notify-item .notify-body { flex:1; min-width:0; }
.notify-item .notify-title {
  font-size:0.88rem; font-weight:600;
  white-space:nowrap; overflow:hidden; text-overflow:ellipsis;
}
.notify-item .notify-preview {
  font-size:0.78rem; color:var(--text-dim);
  white-space:nowrap; overflow:hidden; text-overflow:ellipsis;
  margin-top:2px;
}
.notify-empty {
  padding:32px 16px;
  text-align:center;
  color:var(--text-muted);
  font-size:0.85rem;
}

/* ── @mention autocomplete ─────────────────── */
.mention-dropdown {
  position:absolute; bottom:calc(100% + 4px); left:8px;
  width:200px; max-height:200px;
  background:var(--bg-elevated);
  border:1px solid var(--border);
  border-radius:var(--r);
  box-shadow:0 -4px 16px rgba(0,0,0,0.3);
  z-index:50;
  overflow-y:auto;
}
.mention-item {
  display:flex; align-items:center; gap:8px;
  padding:8px 12px;
  cursor:pointer;
  font-size:0.88rem;
  transition:background var(--t);
}
.mention-item:hover, .mention-item.active {
  background:var(--bg-active);
}
.mention-item .mention-avatar {
  width:24px; height:24px; border-radius:50%;
  display:flex; align-items:center; justify-content:center;
  font-size:0.65rem; font-weight:700; color:#fff;
  flex-shrink:0;
}
.mention-item .mention-name {
  flex:1;
  white-space:nowrap; overflow:hidden; text-overflow:ellipsis;
}

/* ── @mention highlight in messages ────────── */
.msg-mention {
  background:var(--accent-soft);
  color:var(--accent-light);
  padding:0 2px;
  border-radius:3px;
  font-weight:600;
  cursor:pointer;
}
.msg-mention:hover { background:rgba(124,92,252,0.25); }

/* Continuation messages (same author) */
.msg-continuation {
  padding:2px 0 2px 56px;
  position:relative;
}
.msg-continuation .msg-content {
  font-size:0.92rem;
}
.msg-continuation:hover .msg-cont-time {
  display:inline;
}
.msg-cont-time {
  display:none; font-size:0.65rem; color:var(--text-muted);
  margin-right:6px;
}

/* ── Message reactions ──────────────────────────── */
.msg-reactions {
  display:flex;
  gap:4px;
  flex-wrap:wrap;
  margin-top:4px;
}
.msg-reaction {
  display:flex;
  align-items:center;
  gap:4px;
  padding:2px 8px;
  border-radius:12px;
  background:rgba(255,255,255,0.06);
  border:1px solid transparent;
  font-size:0.78rem;
  color:var(--text-dim);
  cursor:pointer;
  transition:all var(--t);
  user-select:none;
}
.msg-reaction:hover {
  background:rgba(124,92,252,0.12);
  border-color:rgba(124,92,252,0.2);
}
.msg-reaction.active {
  background:rgba(124,92,252,0.15);
  border-color:var(--accent);
  color:var(--accent-light);
}
.msg-reaction .reaction-emoji { font-size:0.9rem; }
.msg-reaction .reaction-count { font-weight:600; font-size:0.78rem; }
.msg-reaction .reaction-add {
  width:28px; height:24px; border-radius:12px;
  display:flex; align-items:center; justify-content:center;
  background:rgba(255,255,255,0.04); border:1px dashed rgba(255,255,255,0.15);
  color:var(--text-muted); cursor:pointer; font-size:1rem;
  transition:all var(--t);
}
.msg-reaction .reaction-add:hover {
  background:rgba(255,255,255,0.08); border-color:var(--border-light);
  color:var(--text-sec);
}

/* ── Embed card (rich link/content preview) ──────── */
.msg-embed {
  margin-top:8px;
  border-left:4px solid var(--accent);
  border-radius:var(--r);
  background:var(--bg-elevated);
  overflow:hidden;
  max-width:520px;
}
.msg-embed.embed-green { border-left-color:var(--green); }
.msg-embed.embed-yellow { border-left-color:var(--yellow); }
.msg-embed.embed-pink { border-left-color:var(--pink); }
.msg-embed.embed-blue { border-left-color:var(--blue); }
.msg-embed.embed-red { border-left-color:var(--red); }
.embed-content { padding:12px 16px; }
.embed-title {
  font-size:0.9rem; font-weight:700; color:var(--text);
  margin-bottom:4px;
}
.embed-desc {
  font-size:0.82rem; color:var(--text-sec); line-height:1.5;
}
.embed-field {
  display:flex; margin-top:8px; gap:12px;
}
.embed-field-name { font-size:0.78rem; color:var(--text-dim); font-weight:600; min-width:80px; }
.embed-field-value { font-size:0.82rem; color:var(--text-sec); }
.embed-image {
  width:100%; max-height:300px; object-fit:cover;
  border-radius:0 0 var(--r) var(--r);
}
.embed-footer {
  padding:8px 16px; border-top:1px solid var(--border);
  font-size:0.72rem; color:var(--text-muted);
  display:flex; align-items:center; gap:8px;
}

/* ── File attachment ────────────────────────────── */
.msg-attachment {
  display:flex;
  align-items:center;
  gap:12px;
  margin-top:6px;
  padding:10px 14px;
  background:var(--bg-elevated);
  border-radius:var(--r-md);
  border:1px solid var(--border);
  max-width:420px;
  cursor:pointer;
  transition:border-color var(--t), background var(--t);
}
.msg-attachment:hover { border-color:var(--border-light); background:var(--bg-hover); }
.att-icon {
  width:36px; height:36px; border-radius:var(--r);
  background:var(--accent-soft);
  display:flex; align-items:center; justify-content:center;
  flex-shrink:0; font-size:1.1rem;
}
.att-info { flex:1; min-width:0; }
.att-name { font-size:0.85rem; font-weight:600; color:var(--text); }
.att-size { font-size:0.72rem; color:var(--text-muted); }
.att-download { color:var(--text-dim); flex-shrink:0; }

/* ── Video embed ──────────────────────────────────── */
.msg-video {
  margin-top:8px;
  border-radius:var(--r);
  overflow:hidden;
  border:1px solid var(--border);
  max-width:520px;
}
.msg-video video {
  display:block;
  width:100%;
  border-radius:var(--r);
  background:var(--bg-deeper);
}

/* ── Reply chain indicator ───────────────────────── */
.msg-reply {
  display:flex;
  align-items:center;
  gap:6px;
  padding:4px 0;
  font-size:0.78rem;
  color:var(--text-link);
  cursor:pointer;
  transition:color var(--t);
}
.msg-reply:hover { color:var(--accent-light); }
.msg-reply .reply-line {
  width:2px; height:16px; background:var(--text-muted);
  border-radius:2px;
}
.msg-reply .reply-author { font-weight:600; }

/* ── Topic tag / hashtag ─────────────────────────── */
.msg-tags {
  display:flex; gap:4px; flex-wrap:wrap; margin-top:4px;
}
.msg-tag-pill {
  font-size:0.70rem; padding:1px 8px; border-radius:10px;
  background:rgba(124,92,252,0.12);
  color:var(--accent-light);
  cursor:pointer; transition:all var(--t);
}
.msg-tag-pill:hover { background:rgba(124,92,252,0.2); }
.msg-tag-pill::before { content:'#'; opacity:0.6; }

/* ── Pinned message indicator ────────────────────── */
.msg-pin-indicator {
  position:absolute; top:4px; right:8px;
  font-size:0.65rem; color:var(--yellow);
  display:flex; align-items:center; gap:4px;
  opacity:0.6;
}

/* ── Thread reply count ──────────────────────────── */
.msg-thread {
  margin-top:4px; font-size:0.78rem;
  color:var(--text-link); cursor:pointer;
  display:flex; align-items:center; gap:6px;
  transition:color var(--t);
}
.msg-thread:hover { color:var(--accent-light); }
.msg-thread .thread-line {
  height:1px; width:24px; background:var(--text-muted);
}

/* ── Message input area ──────────────────────────── */
.message-input-area {
  padding:0 16px 16px;
  flex-shrink:0;
}
.message-input-wrapper {
  display:flex;
  align-items:flex-end; /* for potential multi-line */
  background:var(--bg-input);
  border-radius:var(--r-md);
  padding:0 12px;
  border:1px solid transparent;
  transition:border-color var(--t), box-shadow var(--t);
}
.message-input-wrapper:focus-within {
  border-color:var(--accent);
  box-shadow:0 0 0 2px var(--accent-g);
}
.msg-input {
  flex:1;
  background:none;
  border:none;
  outline:none;
  padding:11px 8px;
  font-size:0.95rem;
  color:var(--text);
  resize:none;
  min-height:22px;
  max-height:144px;
}
.msg-input::placeholder { color:var(--text-muted); }
.input-actions {
  display:flex;
  gap:2px;
  align-items:center;
  flex-shrink:0;
}
.send-btn { color:var(--accent-light) !important; }
.send-btn:hover { color:var(--accent) !important; }

/* ── Scroll-to-bottom button ────────────────────── */
.scroll-bottom-btn {
  position: absolute;
  bottom: 80px;
  right: 24px;
  width: 38px; height: 38px;
  border-radius: 50%;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-dim);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
  transition: all 0.25s cubic-bezier(.34,1.56,.64,1);
  box-shadow: var(--sh-sm);
}
.scroll-bottom-btn.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.scroll-bottom-btn:hover {
  background: var(--bg-hover);
  color: var(--text);
  transform: translateY(-2px);
}
.scroll-bottom-btn .new-dot {
  position: absolute;
  top: -3px;
  right: -3px;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--red);
  border: 2px solid var(--bg-surface);
  font-size: 0.5rem;
  color: #fff;
  display: none;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}
.scroll-bottom-btn .new-dot.show {
  display: flex;
}

/* ══════════════════════════════════════════════════
   RIGHT PANEL — Members / Details
   ══════════════════════════════════════════════════ */
.right-panel {
  width:260px;
  min-width:260px;
  background:var(--bg-surface);
  border-left:1px solid var(--border);
  overflow-y:auto;
  padding:16px 14px;
  display:flex;
  flex-direction:column;
  gap:20px;
  scrollbar-width:thin;
  scrollbar-color:var(--bg-hover) transparent;
}

/* ── Channel info ──────────────────────────────── */
.panel-section { margin-bottom:4px; }
.panel-title {
  font-size:0.72rem;
  font-weight:700;
  color:var(--text-dim);
  text-transform:uppercase;
  letter-spacing:0.6px;
  margin-bottom:10px;
  display:flex;
  align-items:center;
  gap:8px;
}
.panel-title .member-count {
  background:linear-gradient(135deg,var(--accent),var(--pink));
  padding:1px 8px; border-radius:8px; font-weight:700; color:#fff;
  font-size:0.68rem;
}
.info-row {
  display:flex; justify-content:space-between; align-items:center;
  padding:7px 0; font-size:0.83rem;
  border-bottom:1px solid var(--border);
}
.info-label { color:var(--text-dim); }
.info-value { color:var(--text-sec); font-weight:500; text-align:right; }

/* ── Member roles section ────────────────────────── */
.role-section { margin-bottom:8px; }
.role-header {
  font-size:0.78rem; font-weight:700; color:var(--text-muted);
  text-transform:uppercase; letter-spacing:0.5px;
  margin-bottom:4px; display:flex; align-items:center; gap:6px;
}
.role-header .role-count {
  font-size:0.65rem; color:var(--text-muted); font-weight:400;
}
.member-list {
  display:flex;
  flex-direction:column;
  gap:1px;
}
.member-item {
  display:flex;
  align-items:center;
  gap:10px;
  padding:7px 8px;
  border-radius:var(--r);
  cursor:pointer;
  transition:background var(--t);
}
.member-item:hover { background:var(--bg-hover); }
.member-avatar {
  width:32px; height:32px; border-radius:50%;
  display:flex; align-items:center; justify-content:center;
  font-size:0.75rem; font-weight:700; color:#fff;
  position:relative; flex-shrink:0;
}
.member-avatar .status-dot {
  position:absolute; bottom:-1px; right:-1px;
  width:11px; height:11px; border-radius:50%;
  border:2.5px solid var(--bg-surface);
}
.status-dot.online { background:var(--green); }
.status-dot.idle { background:var(--yellow); }
.status-dot.offline { background:var(--text-muted); }
.member-info { flex:1; min-width:0; }
.member-name {
  font-size:0.96rem; font-weight:500;
  white-space:nowrap; overflow:hidden; text-overflow:ellipsis;
}
.member-role {
  font-size:0.76rem; color:var(--text-dim); margin-top:1px;
}
.member-role .role-badge {
  display:inline-block; padding:0 5px; border-radius:4px;
  font-size:0.66rem; font-weight:600;
}
.role-badge {
  display:inline-block; padding:0 5px; border-radius:4px;
  font-size:0.66rem; font-weight:600;
}
.role-badge.admin { background:rgba(237,66,69,0.2); color:var(--red); }
.role-badge.moderator { background:rgba(88,101,242,0.2); color:var(--blue); }
.role-badge.member { background:rgba(35,165,89,0.2); color:var(--green); }

/* ── Quick actions ──────────────────────────────── */
.quick-actions {
  display:flex; flex-direction:column; gap:4px;
}
.quick-action {
  display:flex; align-items:center; gap:10px;
  padding:8px 10px; border-radius:var(--r);
  font-size:0.85rem; color:var(--text-dim);
  cursor:pointer; transition:all var(--t);
  background:none; border:none; text-align:left;
}
.quick-action:hover { background:var(--bg-hover); color:var(--text-sec); }
.quick-action .qa-icon {
  width:20px; text-align:center; font-size:1rem;
}

/* ══════════════════════════════════════════════════
   3D CAROUSEL (Login page)
   ══════════════════════════════════════════════════ */
.login-carousel-container {
  position:absolute; inset:0;
  display:flex; align-items:center; justify-content:center;
  overflow:visible; z-index:5;
  perspective:1350px; pointer-events:none;
}
.login-camera {
  position:relative; width:100%; height:100%;
  display:flex; align-items:center; justify-content:center;
  pointer-events:none; transform-style:preserve-3d;
}
.login-3d-card {
  position:absolute; transform-style:preserve-3d;
  backface-visibility:visible; pointer-events:auto; cursor:pointer;
}
.login-3d-card-layer {
  position:absolute; inset:0; border-radius:16px;
  overflow:hidden; pointer-events:none;
}
.login-3d-card-front {
  backface-visibility:hidden;
  background:#0f0f0f;
  border:1px solid rgba(255,255,255,0.15);
  box-shadow:inset 0 1px 1px rgba(255,255,255,0.15);
}
.login-3d-card-front img {
  position:absolute; inset:0; width:100%; height:100%;
  object-fit:cover; border-radius:16px;
}
.campus-overlay {
  position:absolute; inset:0; padding:20px; z-index:10;
  display:flex; flex-direction:column; justify-content:flex-end;
  background:linear-gradient(to top,rgba(0,0,0,0.55) 0%,rgba(0,0,0,0.2) 40%,transparent 70%);
}
.campus-card-title {
  font-size:1rem; font-weight:800; color:#fff;
  letter-spacing:2px; text-shadow:0 2px 8px rgba(0,0,0,0.5);
}
.campus-card-desc {
  font-size:0.78rem; color:rgba(255,255,255,0.75);
  margin-top:4px; letter-spacing:1px;
  text-shadow:0 1px 4px rgba(0,0,0,0.4);
}
.login-3d-card-mid { background:#808080; border:1px solid #808080; }
.login-3d-card-back {
  backface-visibility:hidden;
  background:#0f0f0f;
  border:1px solid rgba(255,255,255,0.15);
}
.login-3d-card-back .back-campus-img {
  position:absolute; inset:0; width:100%; height:100%;
  object-fit:cover; filter:blur(12px) brightness(0.6); transform:scale(1.1);
}
.back-campus-overlay {
  position:absolute; inset:0; padding:20px; z-index:20;
  display:flex; flex-direction:column; justify-content:center;
  align-items:center; text-align:center;
  background:rgba(0,0,0,0.25);
}
.back-campus-title {
  font-size:1.15rem; font-weight:900; color:#fff;
  letter-spacing:3px; text-shadow:0 2px 12px rgba(0,0,0,0.6);
}
.back-campus-desc {
  font-size:0.82rem; color:rgba(255,255,255,0.8);
  margin-top:6px; letter-spacing:1.5px;
  text-shadow:0 1px 6px rgba(0,0,0,0.5);
}

/* ══════════════════════════════════════════════════
   SCROLL REVEAL
   ══════════════════════════════════════════════════ */
[data-reveal] {
  opacity:0;
  transform:translateY(32px);
  transition:opacity 0.8s ease, transform 0.8s ease;
}
[data-reveal].revealed {
  opacity:1;
  transform:translateY(0);
}

/* ══════════════════════════════════════════════════
   RESPONSIVE
   ══════════════════════════════════════════════════ */

/* Tablet — hide right panel, narrow sidebar */
@media (max-width:1000px) {
  .right-panel { display:none; }
  .sidebar {
    width:68px;
    min-width:68px;
  }
  .sidebar-server { padding:12px; justify-content:center; }
  .sidebar-server .server-title { display:none; }
  .sidebar-server::after { display:none; }
  .ch-search { display:none; }
  .ch-item {
    justify-content:center;
    padding:8px;
    position:relative;
  }
  .ch-item .ch-name { display:none; }
  .ch-item .ch-badge {
    position:absolute;
    top:2px;
    right:2px;
    font-size:0.55rem;
    min-width:14px;
    padding:0 4px;
  }
  .ch-category-title svg { display:none; }
  .cat-add { display:none !important; }
  .sidebar-user .user-info { display:none; }
  .user-actions { display:none; }
  .sidebar-user { justify-content:center; }
  .ch-item.ch-voice::after { display:none; }
}

/* Mobile — drawer sidebar + stacked login */
@media (max-width:640px) {
  /* Login page: single column, login entry fills whole screen */
  .login-page {
    grid-template-columns: 1fr;
    grid-template-rows: 1fr;
  }
  /* Hide carousel + geometric characters on mobile — too cramped */
  .login-left {
    display: none;
  }
  .login-right {
    padding: 30px 20px;
    min-height: 100vh;
  }
  .login-entry {
    max-width: 100%;
    padding: 0 10px;
  }
  .login-badge {
    width: 120px;
    height: 120px;
  }
  .login-school-name { font-size:1.7rem; letter-spacing:1px; }
  .login-motto { font-size:0.82rem; margin-bottom:24px; }
  .login-actions { flex-direction:column; gap:12px; width:80%; }
  .btn-signin, .btn-signup { width:100%; padding:14px 32px; }
  .login-card { width:92vw; padding:36px 24px 28px; }
  /* App */
  .sidebar {
    position:fixed;
    left:0;
    top:0;
    bottom:0;
    width:280px;
    z-index:200;
    transform:translateX(-100%);   /* 默认隐藏，由 anime.js 滑入 */
    will-change:transform;
    background:var(--bg-surface);
    border-right:1px solid var(--border);
    box-shadow:4px 0 24px rgba(0,0,0,0.4);
  }
  .sidebar.open .sidebar-server .server-title { display:block; }
  .sidebar.open .ch-item .ch-name { display:block; }
  .sidebar.open .sidebar-user .user-info { display:block; }
  .sidebar.open .user-actions { display:flex; }
  .sidebar.open .ch-category-title svg { display:inline; }

  /* Sidebar overlay backdrop (mobile) — 由 anime.js 控制透明度 */
  .sidebar-overlay {
    opacity:0;
    visibility:hidden;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.45);
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
    z-index: 199;
  }
  .sidebar-overlay.active{ visibility:visible; }

  .mobile-menu-btn {
    display:flex; align-items:center; justify-content:center;
    width:44px; height:44px;
  }
  /* 移动端触摸目标增大至 WCAG 2.2 推荐 44px（AA 下限 24px，44px 更舒适） */
  .icon-btn,
  .send-btn,
  .attach-btn,
  .emoji-btn { width:44px; height:44px; }
  .ch-item { min-height:44px; padding:11px 10px; }
  .sidebar-server { min-height:44px; }
  .ch-category-title { padding:10px 8px 8px; }
  .modal-close { width:44px; height:44px; top:12px; right:12px; }
  .toggle-pw {
    width:44px; height:44px; padding:0;
    right:8px; display:flex; align-items:center; justify-content:center;
  }
  .login-card input:not([type="checkbox"]):not([type="radio"]):not([type="file"]):not([type="submit"]) {
    padding:14px 42px 14px 42px; font-size:16px;
  }
  .input-hint { font-size:0.78rem; margin:7px 0 -6px 2px; }
  .quick-action { min-height:44px; }
  .msg-avatar { width:36px; height:36px; font-size:0.82rem; }
  .msg-content { font-size:0.9rem; }
  .msg-continuation { padding-left:50px; }
  .right-panel {
    position:fixed;
    right:-300px;
    top:0;
    bottom:0;
    width:300px;
    z-index:199;
    transition:right var(--t-smooth);
    box-shadow:-4px 0 24px rgba(0,0,0,0.4);
    display:flex !important;
  }
  .right-panel.open { right:0; }
}

/* ══════════════════════════════════════════════════
   ANIMATIONS
   ══════════════════════════════════════════════════ */
@keyframes fadeIn {
  from { opacity:0; transform:translateY(8px); }
  to   { opacity:1; transform:translateY(0); }
}
@keyframes slideIn {
  from { opacity:0; transform:translateX(-12px); }
  to   { opacity:1; transform:translateX(0); }
}
@keyframes popIn {
  0%   { transform:scale(0); opacity:0; }
  70%  { transform:scale(1.12); }
  100% { transform:scale(1); opacity:1; }
}
.msg-group { animation:fadeIn 0.25s ease both; }
.msg-group:nth-child(2) { animation-delay:0.03s; }
.msg-group:nth-child(3) { animation-delay:0.06s; }
.msg-group:nth-child(4) { animation-delay:0.09s; }
.msg-group:nth-child(5) { animation-delay:0.12s; }
.msg-group:nth-child(6) { animation-delay:0.15s; }
.msg-group:nth-child(7) { animation-delay:0.18s; }
.msg-group:nth-child(8) { animation-delay:0.21s; }
.msg-group:nth-child(9) { animation-delay:0.24s; }
.msg-group:nth-child(10) { animation-delay:0.27s; }
.msg-group:nth-child(n+11) { animation-delay:0.3s; }

/* ══════════════════════════════════════════════════
   PROFILE PAGE
   ══════════════════════════════════════════════════ */
.profile-container {
  max-width:640px;
  margin:0 auto;
  padding:32px 24px;
  position:relative;
  z-index:3;
  height:100vh;
  overflow-y:auto;
}
.profile-back {
  display:inline-flex; align-items:center; gap:6px;
  padding:8px 16px; border-radius:var(--r);
  background:rgba(255,255,255,0.06); border:1px solid var(--border);
  color:var(--text-sec); cursor:pointer; margin-bottom:24px;
  transition:all var(--t);
}
.profile-back:hover { background:var(--bg-hover); color:var(--text); }
.profile-card {
  background:var(--bg-surface);
  border:1px solid var(--border);
  border-radius:var(--r-lg);
  padding:36px 32px;
  text-align:center;
  margin-bottom:24px;
}
.profile-avatar {
  width:80px; height:80px; border-radius:50%;
  display:flex; align-items:center; justify-content:center;
  font-size:2rem; font-weight:700; color:#fff;
  margin:0 auto 16px;
}
.profile-name { font-size:1.5rem; font-weight:800; margin-bottom:4px; }
.profile-username { font-size:0.88rem; color:var(--text-dim); margin-bottom:12px; }
.profile-bio { font-size:0.9rem; color:var(--text-sec); margin-bottom:20px; max-width:400px; margin-left:auto; margin-right:auto; }
.profile-stats {
  display:flex; justify-content:center; gap:32px;
  margin-bottom:24px;
}
.profile-stat { display:flex; flex-direction:column; align-items:center; }
.ps-num { font-size:1.2rem; font-weight:700; color:var(--text); }
.ps-label { font-size:0.72rem; color:var(--text-muted); margin-top:2px; }
.profile-actions { display:flex; gap:12px; justify-content:center; }
.profile-btn {
  padding:10px 24px; border-radius:var(--r-md);
  background:var(--accent); color:#fff; font-weight:600;
  border:none; cursor:pointer; font-size:0.9rem;
  transition:all var(--t);
}
.profile-btn:hover { background:#8b6ffc; transform:translateY(-1px); }
.profile-btn-outline {
  background:transparent; border:1.5px solid var(--border);
  color:var(--text-sec);
}
.profile-btn-outline:hover { background:var(--bg-hover); color:var(--text); }
.profile-section {
  background:var(--bg-surface);
  border:1px solid var(--border);
  border-radius:var(--r-lg);
  padding:20px 24px;
  margin-bottom:16px;
}
.profile-section h3 {
  font-size:0.85rem; font-weight:700; color:var(--text-dim);
  text-transform:uppercase; letter-spacing:0.5px; margin-bottom:12px;
  display:flex; align-items:center; gap:8px;
}
.profile-section h3 .badge {
  background:var(--accent); color:#fff; padding:0 8px;
  border-radius:8px; font-size:0.68rem; font-weight:700;
}
.empty-text { font-size:0.85rem; color:var(--text-muted); padding:8px 0; }
.friend-list { display:flex; flex-direction:column; gap:2px; }
.friend-item {
  display:flex; align-items:center; gap:12px;
  padding:8px 10px; border-radius:var(--r);
  transition:background var(--t);
}
.friend-item:hover { background:var(--bg-hover); }
.friend-avatar {
  width:36px; height:36px; border-radius:50%;
  display:flex; align-items:center; justify-content:center;
  font-size:0.85rem; font-weight:700; color:#fff;
  flex-shrink:0;
}
.friend-info { flex:1; min-width:0; }
.friend-name { font-size:0.88rem; font-weight:600; }
.friend-since { font-size:0.72rem; color:var(--text-muted); }
.friend-actions { display:flex; gap:4px; flex-shrink:0; }
.add-friend-form { display:flex; gap:8px; }
.add-friend-input {
  flex:1; padding:8px 12px; border-radius:var(--r);
  background:var(--bg-input); border:1px solid var(--border);
  color:var(--text); outline:none; font-size:0.85rem;
}
.add-friend-input:focus { border-color:var(--accent); }
.add-friend-input::placeholder { color:var(--text-muted); }

/* ═══════════════════════════════════════════════════
   可访问性：减少动效 (WCAG 2.2 AA)
   ═══════════════════════════════════════════════════ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  #stars-canvas,
  #main-dots,
  .login-carousel-container,
  .login-badge::after {
    display: none !important;
  }
  /* 弹窗/侧栏/通知等 anime.js 触发的入场动画在减弱动效下直接显隐，不做位移缩放 */
  .login-modal-overlay,
  .login-card-modal,
  .sidebar,
  .sidebar-overlay,
  .notify-dropdown,
  .msg-group {
    animation: none !important;
    transition: opacity 0.01ms linear !important;
  }
  /* 直接置为最终可见/展开状态（覆盖 anime.js 的 inline opacity:0 起点） */
  .login-modal-overlay.active,
  .login-card-modal,
  .sidebar.open,
  .notify-dropdown[style*="block"] {
    opacity: 1 !important;
    transform: none !important;
  }
  .login-school-name,
  .login-school-name .gradient-text,
  .login-school-name::after {
    animation: none !important;
    background: none !important;
    -webkit-background-clip: border-box !important;
    color: var(--text) !important;
    opacity: 1 !important;
  }
}

/* ═══════════════════════════════════════════════════
   消息骨架加载 (Skeleton Loader)
   ═══════════════════════════════════════════════════ */
.msg-skeleton {
  display: flex;
  gap: 12px;
  padding: 14px 16px;
}
.msg-skeleton .sk-avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--bg-elevated);
  flex-shrink: 0;
}
.msg-skeleton .sk-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-top: 4px;
}
.msg-skeleton .sk-line {
  height: 12px;
  border-radius: 4px;
  background: var(--bg-elevated);
  position: relative;
  overflow: hidden;
}
.msg-skeleton .sk-line:first-child { width: 28%; }
.msg-skeleton .sk-line:nth-child(2) { width: 72%; }
.msg-skeleton .sk-line:nth-child(3) { width: 48%; }

.sk-line::after {
  content: '';
  position: absolute;
  inset: 0;
  transform: translateX(-100%);
  background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.04) 50%, transparent 100%);
  animation: skShimmer 1.8s infinite;
}
@keyframes skShimmer {
  100% { transform: translateX(100%); }
}