*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }

:root {
  --bg: #0a0a0f;
  --bg-card: #12121a;
  --bg-elevated: #1a1a26;
  --bg-hover: #22223a;
  --text: #eeeef0;
  --text-secondary: #8888a0;
  --text-muted: #55556a;
  --primary: #7c5cfc;
  --primary-hover: #6a48f0;
  --primary-glow: rgba(124,92,252,0.15);
  --accent: #2dd4a8;
  --accent-glow: rgba(45,212,168,0.15);
  --danger: #f43f5e;
  --border: #1e1e30;
  --radius: 14px;
  --radius-sm: 10px;
  --font: 'Inter', -apple-system, sans-serif;
  --transition: 0.2s cubic-bezier(0.4,0,0.2,1);
}

html, body { height:100%; font-family:var(--font); background:var(--bg); color:var(--text); overflow:hidden; -webkit-font-smoothing:antialiased; }

.screen { display:none; height:100vh; }
.screen.active { display:flex; }

/* ===== HOME ===== */
#home-screen {
  align-items:center; justify-content:center;
  background:
    radial-gradient(ellipse 60% 50% at 50% 0%, var(--primary-glow), transparent),
    radial-gradient(ellipse 40% 40% at 80% 100%, var(--accent-glow), transparent),
    var(--bg);
  overflow-y:auto;
}

.home-container { width:100%; max-width:420px; padding:24px; text-align:center; }

.brand-icon {
  width:64px; height:64px; margin:0 auto 16px;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  border-radius:18px; display:flex; align-items:center; justify-content:center;
  box-shadow:0 8px 32px var(--primary-glow);
}
.brand-icon .material-icons-round { font-size:30px; color:#fff; }
.brand h1 { font-size:28px; font-weight:800; letter-spacing:-0.5px; }
.brand h1 span { color:var(--primary); }
.tagline { color:var(--text-secondary); font-size:14px; margin-top:6px; margin-bottom:32px; }

/* Auth bar */
#auth-bar {
  display:flex; align-items:center; justify-content:space-between; gap:8px;
  margin-bottom:12px; padding:10px 14px;
  background:var(--bg-elevated); border:1px solid var(--border);
  border-radius:var(--radius-sm); font-size:13px; text-align:left;
}
#auth-label { color:var(--text-secondary); display:flex; align-items:center; gap:4px; }

/* Inputs */
.input-group { margin-bottom:12px; text-align:left; }
.premium-label { display:flex; align-items:center; gap:4px; font-size:11px; font-weight:600; color:var(--accent); margin-bottom:6px; flex-wrap:wrap; }
.premium-label .material-icons-round { font-size:14px; }
.premium-hint { font-size:11px; font-weight:400; color:var(--text-muted); margin-left:2px; }
.input-hint { font-size:11px; color:var(--text-muted); margin-top:4px; }

input[type="text"], select {
  width:100%; padding:14px 16px;
  background:var(--bg-card); border:1px solid var(--border);
  border-radius:var(--radius-sm); color:var(--text); font-size:14px; font-family:var(--font); outline:none;
  transition:border var(--transition);
}
input[type="text"]:focus, select:focus { border-color:var(--primary); box-shadow:0 0 0 3px var(--primary-glow); }
input[type="text"]::placeholder { color:var(--text-muted); }
select { cursor:pointer; }
select option { background:var(--bg-elevated); }

.btn {
  width:100%; padding:14px 20px; border:none; border-radius:var(--radius-sm);
  font-size:15px; font-weight:600; font-family:var(--font); cursor:pointer;
  display:flex; align-items:center; justify-content:center; gap:8px;
  transition:all var(--transition);
}
.btn:disabled { opacity:0.4; cursor:not-allowed; transform:none !important; }
.btn-primary { background:var(--primary); color:#fff; box-shadow:0 4px 16px var(--primary-glow); }
.btn-primary:not(:disabled):hover { background:var(--primary-hover); transform:translateY(-1px); }
.btn-secondary { background:var(--bg-elevated); color:var(--text); border:1px solid var(--border); }
.btn-secondary:hover { background:var(--bg-hover); border-color:var(--primary); }

.divider { display:flex; align-items:center; margin:20px 0; color:var(--text-muted); font-size:12px; }
.divider::before, .divider::after { content:''; flex:1; height:1px; background:var(--border); }
.divider span { padding:0 12px; }

.join-group { display:flex; gap:8px; }
.join-group input { flex:1; }
.join-group .btn { width:auto; padding:14px 20px; }

.features-grid { display:grid; grid-template-columns:1fr 1fr; gap:10px; margin-top:32px; }
.feature { display:flex; align-items:center; gap:8px; padding:10px 12px; background:var(--bg-card); border:1px solid var(--border); border-radius:var(--radius-sm); font-size:12px; color:var(--text-secondary); }
.feature .material-icons-round { font-size:18px; color:var(--primary); }

/* ===== MEETING ===== */
#meeting-screen { flex-direction:row; }
.meeting-layout { flex:1; display:flex; flex-direction:column; height:100vh; min-width:0; }

.meeting-topbar { display:flex; align-items:center; justify-content:space-between; padding:12px 20px; background:var(--bg-card); border-bottom:1px solid var(--border); min-height:56px; }
.meeting-info { display:flex; align-items:center; gap:8px; font-size:14px; font-weight:500; }
.meeting-info .material-icons-round { color:var(--primary); font-size:20px; }
.meeting-timer { font-size:13px; color:var(--text-secondary); font-variant-numeric:tabular-nums; }
.meeting-participants-count { display:flex; align-items:center; gap:6px; font-size:13px; color:var(--text-secondary); }
.meeting-participants-count .material-icons-round { font-size:18px; }

.video-grid { flex:1; display:grid; gap:8px; padding:8px; grid-template-columns:1fr; grid-auto-rows:1fr; overflow:auto; }
.video-grid:has(.video-tile:nth-child(2)) { grid-template-columns:1fr 1fr; }
.video-grid:has(.video-tile:nth-child(5)) { grid-template-columns:1fr 1fr 1fr; }

.video-tile { position:relative; background:var(--bg-elevated); border-radius:var(--radius); overflow:hidden; min-height:180px; }
.video-tile video { width:100%; height:100%; object-fit:cover; display:block; }
.video-label { position:absolute; bottom:10px; left:10px; display:flex; align-items:center; gap:6px; padding:6px 12px; background:rgba(0,0,0,0.6); backdrop-filter:blur(8px); border-radius:8px; font-size:12px; font-weight:500; }
.video-label .material-icons-round { font-size:14px; }
.video-muted-overlay { position:absolute; inset:0; background:var(--bg-elevated); display:none; align-items:center; justify-content:center; }
.video-muted-overlay.active { display:flex; }
.video-muted-overlay .material-icons-round { font-size:48px; color:var(--text-muted); }

/* Controls */
.control-bar { display:flex; align-items:center; justify-content:center; gap:10px; padding:14px; background:var(--bg-card); border-top:1px solid var(--border); flex-wrap:wrap; }
.control-btn { position:relative; width:52px; height:52px; border:none; border-radius:16px; background:var(--bg-elevated); color:var(--text); cursor:pointer; display:flex; align-items:center; justify-content:center; transition:all var(--transition); }
.control-btn:hover { background:var(--bg-hover); transform:scale(1.05); }
.control-btn.active { background:var(--primary); color:#fff; }
.control-btn.danger { background:var(--danger); color:#fff; }
.control-btn.danger:hover { background:#e11d48; }
.control-btn.muted { background:var(--danger); color:#fff; }

.badge { position:absolute; top:-4px; right:-4px; min-width:18px; height:18px; background:var(--danger); color:#fff; font-size:10px; font-weight:700; border-radius:9px; display:flex; align-items:center; justify-content:center; padding:0 4px; }

.icon-btn { width:36px; height:36px; border:none; border-radius:10px; background:transparent; color:var(--text-secondary); cursor:pointer; display:flex; align-items:center; justify-content:center; transition:all var(--transition); }
.icon-btn:hover { background:var(--bg-hover); color:var(--text); }
.icon-btn.small { width:28px; height:28px; }
.icon-btn.small .material-icons-round { font-size:16px; }

/* Chat */
.chat-panel { width:0; overflow:hidden; background:var(--bg-card); border-left:1px solid var(--border); display:flex; flex-direction:column; transition:width 0.3s ease; }
.chat-panel.open { width:320px; }
.chat-header { display:flex; align-items:center; justify-content:space-between; padding:16px 20px; border-bottom:1px solid var(--border); }
.chat-header h3 { font-size:16px; font-weight:600; }
.chat-messages { flex:1; overflow-y:auto; padding:16px; display:flex; flex-direction:column; gap:12px; }
.chat-msg { max-width:85%; }
.chat-msg.own { align-self:flex-end; }
.chat-msg-name { font-size:11px; font-weight:600; color:var(--primary); margin-bottom:4px; }
.chat-msg-bubble { padding:10px 14px; background:var(--bg-elevated); border-radius:12px 12px 12px 4px; font-size:13px; line-height:1.5; word-break:break-word; }
.chat-msg.own .chat-msg-bubble { background:var(--primary); color:#fff; border-radius:12px 12px 4px 12px; }
.chat-msg-time { font-size:10px; color:var(--text-muted); margin-top:4px; }
.chat-input-area { display:flex; gap:8px; padding:12px 16px; border-top:1px solid var(--border); }
.chat-input-area input { flex:1; padding:10px 14px; border-radius:10px; }

/* Settings Modal */
.modal-overlay { position:fixed; inset:0; background:rgba(0,0,0,0.7); backdrop-filter:blur(4px); display:none; align-items:center; justify-content:center; z-index:200; }
.modal-overlay.open { display:flex; }
.modal { width:100%; max-width:440px; background:var(--bg-card); border:1px solid var(--border); border-radius:var(--radius); overflow:hidden; }
.modal-header { display:flex; align-items:center; justify-content:space-between; padding:16px 20px; border-bottom:1px solid var(--border); }
.modal-header h3 { font-size:16px; font-weight:600; }
.modal-body { padding:20px; display:flex; flex-direction:column; gap:16px; }
.setting-row { display:flex; flex-direction:column; gap:6px; }
.setting-row label { display:flex; align-items:center; gap:6px; font-size:13px; font-weight:500; color:var(--text-secondary); }
.setting-row label .material-icons-round { font-size:16px; }
.modal-footer { padding:16px 20px; border-top:1px solid var(--border); display:flex; justify-content:flex-end; }

/* Toast */
.toast { position:fixed; bottom:90px; left:50%; transform:translateX(-50%) translateY(20px); padding:10px 20px; background:var(--bg-elevated); border:1px solid var(--border); border-radius:10px; font-size:13px; color:var(--text); opacity:0; pointer-events:none; transition:all 0.3s ease; z-index:1000; white-space:nowrap; }
.toast.show { opacity:1; transform:translateX(-50%) translateY(0); }

@media (max-width:768px) {
  .home-container { padding:20px 16px; }
  .brand h1 { font-size:22px; }
  .features-grid { grid-template-columns:1fr 1fr; }
  #meeting-screen { flex-direction:column; }
  .video-grid { grid-template-columns:1fr !important; }
  .video-tile { min-height:140px; }
  .control-btn { width:44px; height:44px; border-radius:14px; }
  .control-bar { gap:6px; padding:10px; }
  .chat-panel.open { position:fixed; inset:0; width:100%; z-index:100; }
  .modal { margin:16px; }
}

::-webkit-scrollbar { width:4px; }
::-webkit-scrollbar-track { background:transparent; }
::-webkit-scrollbar-thumb { background:var(--border); border-radius:2px; }