:root {
  --bg: #07070c;
  --panel: #0e0e18;
  --panel-2: #151522;
  --line: rgba(255, 255, 255, .08);
  --line-strong: rgba(165, 180, 252, .35);
  --text: #e8e8f2;
  --muted: #9ca3af;
  --accent: #818cf8;
  --accent-2: #a78bfa;
  --accent-3: #6366f1;
  --green: #6ee7b7;
  --red: #fca5a5;
  --radius: 16px;
  --shadow: 0 30px 70px -45px rgba(99, 102, 241, .85);
}
body.light {
  --bg: #f4f5fb;
  --panel: #ffffff;
  --panel-2: #eef0f8;
  --line: rgba(15, 23, 42, .10);
  --line-strong: rgba(99, 102, 241, .35);
  --text: #111827;
  --muted: #5b6475;
}
* { box-sizing: border-box; }
html { color-scheme: dark; }
body.light { color-scheme: light; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, sans-serif;
  color: var(--text);
  background:
    radial-gradient(1100px 700px at 50% -12%, rgba(99, 102, 241, .20), transparent 70%),
    radial-gradient(900px 600px at 100% 0%, rgba(139, 92, 246, .10), transparent 60%),
    var(--bg);
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
.app { min-height: 100vh; display: flex; flex-direction: column; }

/* ASCS top bar */
.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 12px 22px;
  background: rgba(8, 8, 15, .84);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}
.brand { display: flex; align-items: center; gap: 11px; text-decoration: none; min-width: 0; }
.brand-logo { width: 38px; height: 38px; object-fit: contain; }
.brand-copy { display: flex; flex-direction: column; line-height: 1.2; min-width: 0; }
.brand-copy strong { font-size: 1rem; font-weight: 800; letter-spacing: -.015em; }
.brand-copy small { color: var(--muted); font-size: .72rem; }
.top-actions { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; justify-content: flex-end; }
.as-pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 9px; border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: rgba(129, 140, 248, .12);
  color: #c7d2fe; font-size: .62rem; font-weight: 700;
  letter-spacing: .09em; text-transform: uppercase;
}
.plus-toggle { color: var(--muted); font-size: .8rem; display: inline-flex; gap: 6px; align-items: center; }

/* Buttons */
.btn {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 255, 255, .045), rgba(255, 255, 255, .015)), var(--panel-2);
  color: var(--text);
  padding: 9px 14px;
  border-radius: 10px;
  cursor: pointer;
  font: 600 .86rem/1 'Inter', sans-serif;
  text-decoration: none;
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  transition: transform .15s ease, border-color .15s ease, background .15s ease;
}
.btn:hover { transform: translateY(-1px); border-color: var(--line-strong); }
.btn.primary {
  background: linear-gradient(135deg, var(--accent-3), var(--accent-2));
  border-color: transparent;
  color: #fff;
  box-shadow: 0 10px 26px -14px rgba(99, 102, 241, .9);
}
.btn.ghost { background: transparent; }
.btn.danger { background: rgba(127, 29, 29, .55); border-color: rgba(248, 113, 113, .35); color: #fecaca; }

/* Lobby */
.lobby { width: min(980px, 100%); margin: 0 auto; padding: 48px 20px 64px; }
.hero { margin-bottom: 8px; }
.hero h1 {
  margin: 0;
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  line-height: 1.02;
  letter-spacing: -.045em;
  font-weight: 800;
  background: linear-gradient(110deg, #fff 5%, #c7d2fe 42%, #a78bfa 78%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.hero p { color: var(--muted); max-width: 64ch; line-height: 1.7; font-size: 1rem; }
.lobby-card {
  background: linear-gradient(180deg, rgba(255, 255, 255, .028), rgba(255, 255, 255, 0)), var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  margin: 20px 0;
  display: grid;
  gap: 12px;
  box-shadow: var(--shadow);
}
.lobby-card h3 { margin: 0; font-size: 1rem; }
.field { display: grid; gap: 6px; }
.field label { font-size: .74rem; color: var(--muted); font-weight: 600; letter-spacing: .04em; text-transform: uppercase; }
.field input, .field select {
  padding: 11px 12px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: rgba(7, 7, 12, .72);
  color: var(--text);
  font: inherit;
}
body.light .field input, body.light .field select { background: #fff; }
.field input:focus, .field select:focus { outline: 2px solid rgba(129, 140, 248, .45); outline-offset: 1px; border-color: transparent; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.lobby-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 2px; }
.lobby-note { color: var(--muted); font-size: .78rem; line-height: 1.55; margin: 0; }

.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; margin-top: 20px; }
.feature-grid article {
  background: linear-gradient(180deg, rgba(255, 255, 255, .025), transparent), var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 17px;
}
.feature-grid h3 { margin: 0 0 6px; font-size: .94rem; }
.feature-grid p { color: var(--muted); font-size: .82rem; margin: 0; line-height: 1.55; }

/* Room */
.room { padding: 18px 22px 28px; }
.room-header { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 14px; }
.room-header h2 { margin: 0; font-size: 1.2rem; letter-spacing: -.02em; }
.room-header p { color: var(--muted); margin: 4px 0 0; font-size: .82rem; }
.room-actions { display: flex; gap: 8px; }
.video-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 12px; margin: 16px 0; }
.video-tile {
  background: #000;
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  box-shadow: 0 20px 50px -35px rgba(0, 0, 0, .9);
}
.video-tile video { width: 100%; height: 100%; object-fit: cover; }
.tile-label { position: absolute; bottom: 8px; left: 8px; background: rgba(0, 0, 0, .62); padding: 4px 8px; border-radius: 6px; font-size: .72rem; }
.controls-bar { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; }
.ctrl {
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--panel-2);
  color: var(--text);
  cursor: pointer;
  font: 600 .84rem/1 'Inter', sans-serif;
}
.ctrl:hover { border-color: var(--line-strong); }
.ctrl.muted, .ctrl.active { background: linear-gradient(135deg, var(--accent-3), var(--accent-2)); color: #fff; border-color: transparent; }

/* Chat panel */
.chat-panel {
  background: linear-gradient(180deg, rgba(255, 255, 255, .025), transparent), var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px;
}
.chat-panel.hidden { display: none; }
.chat-log { height: 220px; overflow-y: auto; display: grid; gap: 6px; padding: 6px; }
.chat-row { display: grid; gap: 2px; }
.chat-row.mine .chat-name { color: var(--accent-2); }
.chat-name { font-size: .7rem; color: var(--muted); }
.chat-text { font-size: .88rem; }
.chat-form { display: flex; gap: 8px; margin-top: 8px; }
.chat-form input {
  flex: 1; padding: 9px 11px; border-radius: 9px;
  border: 1px solid var(--line); background: var(--panel-2); color: var(--text); font: inherit;
}
.hidden { display: none; }
.room-list { display: flex; flex-wrap: wrap; gap: 8px; }
.room-chip {
  border: 1px solid var(--line);
  background: var(--panel-2);
  color: var(--text);
  padding: 7px 11px;
  border-radius: 9px;
  cursor: pointer;
  font: 600 .82rem/1 'Inter', sans-serif;
}
.room-chip:hover { border-color: var(--line-strong); }
.room-chip span { color: var(--muted); margin-left: 6px; font-size: .72rem; }

@media (max-width: 680px) {
  .topbar { padding: 10px 14px; align-items: flex-start; }
  .brand-logo { width: 32px; height: 32px; }
  .brand-copy small { display: none; }
  .as-pill { display: none; }
  .top-actions .plus-toggle { display: none; }
  .lobby { padding: 30px 14px 48px; }
  .field-row { grid-template-columns: 1fr; }
  .lobby-card { padding: 16px; }
  .room { padding: 14px; }
  .btn, .ctrl { font-size: .8rem; }
}

/* Privacy controls */
.privacy-card { border-color: rgba(129, 140, 248, .22); }
.privacy-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; }
.privacy-kicker { display: block; color: var(--accent-2); font-size: .62rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; margin-bottom: 3px; }
.privacy-badge { display: inline-flex; align-items: center; padding: 5px 9px; border-radius: 999px; border: 1px solid var(--line-strong); background: rgba(129, 140, 248, .10); color: #c7d2fe; font-size: .62rem; font-weight: 700; letter-spacing: .05em; white-space: nowrap; }
.privacy-toggles { display: flex; flex-wrap: wrap; gap: 10px 18px; padding-top: 2px; }
.toggle { display: inline-flex; align-items: center; gap: 8px; color: var(--muted); font-size: .82rem; cursor: pointer; }
.toggle input { accent-color: var(--accent); width: 16px; height: 16px; }
.settings-actions { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.privacy-status { color: var(--green); font-size: .78rem; }
.privacy-status.error { color: var(--red); }
.room-settings { background: linear-gradient(180deg, rgba(129, 140, 248, .10), rgba(255, 255, 255, 0)), var(--panel); border: 1px solid var(--line-strong); border-radius: var(--radius); padding: 16px; margin: 0 0 14px; display: grid; gap: 12px; box-shadow: var(--shadow); }
.settings-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; }
.settings-head h3 { margin: 0; font-size: 1rem; }
.btn:disabled, .btn[disabled] { opacity: .45; cursor: not-allowed; transform: none; }
.ctrl:disabled { opacity: .45; cursor: not-allowed; }

/* Desktop one-screen lobby: hero, join, privacy and open rooms in a dashboard grid. */
@media (min-width: 981px) {
  .lobby {
    width: min(1240px, 100%);
    margin: 0 auto;
    padding: 24px 20px 28px;
    display: grid;
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 1fr) minmax(0, .82fr);
    grid-template-areas:
      "hero hero hero"
      "join privacy rooms"
      "features features features";
    gap: 14px;
    align-items: start;
  }
  .hero { grid-area: hero; margin: 0; }
  .hero h1 { font-size: clamp(2rem, 3.2vw, 2.7rem); }
  .hero p { max-width: none; font-size: .92rem; line-height: 1.55; }
  .join-card { grid-area: join; }
  .privacy-card { grid-area: privacy; }
  .open-rooms-card { grid-area: rooms; }
  .feature-grid { grid-area: features; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 8px; margin-top: 0; }
  .feature-grid article { padding: 10px 12px; }
  .feature-grid h3 { font-size: .8rem; margin-bottom: 3px; }
  .feature-grid p { font-size: .7rem; line-height: 1.4; }
  .lobby-card { margin: 0; padding: 16px; gap: 10px; }
  .field input, .field select { padding: 9px 10px; }
  .lobby-note { font-size: .72rem; }
  .privacy-toggles { gap: 7px 12px; }
  .toggle { font-size: .76rem; }
  .room-list { max-height: 150px; overflow: auto; }
}
@media (min-width: 981px) and (max-height: 820px) {
  .lobby {
    grid-template-areas:
      "hero hero hero"
      "join privacy rooms";
  }
  .feature-grid { display: none; }
  .hero h1 { font-size: 2.2rem; }
}

/* Keep form fields inside their grid cells */
.field { min-width: 0; }
.field input, .field select { width: 100%; min-width: 0; }
.field-row { min-width: 0; }
@media (min-width: 981px) {
  .privacy-card .field-row { grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); }
  .privacy-card .field label { white-space: nowrap; }
}
.plus-needs { color: var(--accent-2); font-size: .62rem; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; opacity: .85; }