:root {
  --ground: #000000;
  --text: #ffffff;
  --text-body: rgba(255,255,255,0.82);
  --text-muted: rgba(255,255,255,0.72);
  --text-dim: rgba(255,255,255,0.45);
  --text-faint: rgba(255,255,255,0.40);
  --text-disabled: rgba(255,255,255,0.38);
  --rule: rgba(255,255,255,0.16);
  --rule-strong: rgba(255,255,255,0.28);
  --hover-fill: rgba(255,255,255,0.05);
  --hover-fill-strong: rgba(255,255,255,0.08);
  --accent: #9184d9;
  --accent-light: #b5abfc;
  --accent-wash: rgba(145,132,217,0.10);
  --scroll-thumb: #2a2a2a;

  --sp-1: 2.8px;
  --sp-2: 5.6px;
  --sp-3: 8.4px;
  --sp-4: 11.2px;
  --sp-5: 14px;
  --sp-6: 16.8px;
  --sp-7: 22.4px;
  --sp-8: 28px;

  --font-display: 'Archivo', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, monospace;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}
html, body { height: 100%; margin: 0; }
body {
  background: var(--ground);
  color: var(--text-body);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--accent); color: #000; }

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--scroll-thumb); }
* { scrollbar-width: thin; scrollbar-color: var(--scroll-thumb) transparent; }

button, input {
  font-family: inherit;
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ---------- layout shell ---------- */

.app { display: flex; height: 100vh; }

.mobile-header { display: none; }
.mobile-actions { display: none; }

/* ---------- sidebar ---------- */

.sidebar {
  width: 252px;
  flex-shrink: 0;
  border-right: 1px solid var(--rule);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.kicker {
  font: 400 11px var(--font-mono);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}

.room-block { padding: var(--sp-7) var(--sp-6) var(--sp-6); }
.room-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-stretch: 125%;
  font-size: 22px;
  line-height: 1.05;
  letter-spacing: -0.005em;
  text-transform: uppercase;
  color: var(--text);
  margin-top: var(--sp-3);
}
.room-meta {
  font: 400 10.5px var(--font-mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-top: var(--sp-3);
}
.room-block::after {
  content: '';
  display: block;
  margin-top: var(--sp-6);
  border-bottom: 1px solid var(--rule);
}

.channel-group { padding: var(--sp-6) 0; }
.group-label {
  font: 400 10px var(--font-mono);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-faint);
  padding: 0 var(--sp-6) var(--sp-3);
}

.channel-row {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  width: 100%;
  padding: var(--sp-3) var(--sp-6);
  font: 400 13.5px var(--font-body);
  color: var(--text-muted);
  background: transparent;
  border: none;
  border-left: 2px solid transparent;
  border-radius: 0;
  text-align: left;
  cursor: pointer;
}
.channel-row:hover { background: var(--hover-fill); }
.channel-row.active {
  color: var(--text);
  background: var(--hover-fill);
  border-left-color: var(--accent);
}
.voice-row.in-voice {
  color: var(--text);
  background: var(--accent-wash);
  border-left-color: var(--accent);
}
.voice-row.in-voice .ch-icon { color: var(--accent-light); }
.ch-prefix {
  font: 400 13px var(--font-mono);
  color: var(--text-dim);
}
.ch-icon { display: inline-flex; color: var(--text-dim); }
.ch-count {
  margin-left: auto;
  font: 400 11px var(--font-mono);
  color: var(--text-dim);
}

.voice-roster {
  list-style: none;
  margin: var(--sp-1) 0 0;
  padding: 0 var(--sp-6) 0 var(--sp-6);
}
.voice-roster li {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-1) 0;
  padding-left: var(--sp-6);
}
.voice-roster .roster-name {
  font: 400 12.5px var(--font-body);
  color: var(--text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.voice-roster .roster-mic {
  margin-left: auto;
  color: var(--text-dim);
  display: inline-flex;
}

.avatar-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  flex-shrink: 0;
}
.avatar-grid span { display: block; }
.avatar-speaking {
  outline: 1px solid var(--accent);
  outline-offset: 2px;
}

.online-block {
  margin-top: auto;
  border-top: 1px solid var(--rule);
  padding: var(--sp-6);
  overflow-y: auto;
}
.online-list { list-style: none; margin: var(--sp-3) 0 0; padding: 0; }
.online-list li {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-1) 0;
  font: 400 12.5px var(--font-body);
  color: var(--text-muted);
}

/* ---------- main column ---------- */

.main { flex: 1; min-width: 0; display: flex; flex-direction: column; }

.channel-header {
  padding: var(--sp-7) var(--sp-8) var(--sp-6);
  border-bottom: 1px solid var(--rule);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--sp-6);
}
.channel-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-stretch: 125%;
  font-size: 28px;
  line-height: 1;
  letter-spacing: -0.005em;
  text-transform: uppercase;
  color: var(--text);
}
.channel-topic {
  font: 400 10.5px var(--font-mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
  white-space: nowrap;
}

/* ---------- voice stage ---------- */

.voice-stage { border-bottom: 1px solid var(--rule); }

.stage-status {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  padding: 14px var(--sp-8);
}
.presence-mark { width: 6px; height: 6px; background: var(--accent); flex-shrink: 0; }
.stage-label {
  font: 400 10.5px var(--font-mono);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text);
}
.stage-live {
  font: 400 10.5px var(--font-mono);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-dim);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.stage-controls {
  margin-left: auto;
  display: flex;
  border: 1px solid var(--rule-strong);
  flex-shrink: 0;
}
.ctrl-btn {
  background: transparent;
  color: var(--text);
  border: none;
  border-left: 1px solid var(--rule-strong);
  border-radius: 0;
  padding: 7px 14px;
  font: 400 10.5px var(--font-mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
}
.ctrl-btn:first-child { border-left: none; }
.ctrl-btn:hover { background: var(--hover-fill-strong); }
.ctrl-btn:disabled { color: var(--text-disabled); cursor: not-allowed; }
.ctrl-btn:disabled:hover { background: transparent; }
.ctrl-btn.on { color: var(--accent-light); }
.ctrl-btn.join-btn {
  padding: 7px 16.8px;
  background: #fff;
  color: #000;
}
.ctrl-btn.join-btn:hover { background: #fff; opacity: 0.9; }
.ctrl-btn.join-btn.in-voice { background: transparent; color: var(--text); }
.ctrl-btn.join-btn.in-voice:hover { background: var(--hover-fill-strong); }

.stage-tiles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  border-top: 1px solid var(--rule);
}
.stage-tile {
  display: flex;
  align-items: center;
  gap: var(--sp-5);
  padding: 18px var(--sp-7);
  border-right: 1px solid var(--rule);
  min-width: 0;
}
.tile-portrait {
  position: relative;
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  overflow: hidden;
  background: #080808;
}
.tile-camera {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.tile-portrait.local .tile-camera { transform: scaleX(-1); }
.tile-portrait .tile-avatar[hidden],
.tile-camera[hidden] { display: none; }
.tile-text { min-width: 0; }
.tile-name {
  font: 400 13px var(--font-body);
  color: var(--text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.stage-tile.speaking .tile-name { color: var(--text); }
.stage-tile.speaking { background: var(--accent-wash); }
.tile-state {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  margin-top: var(--sp-1);
  font: 400 9.5px var(--font-mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.stage-tile.speaking .tile-state { color: var(--accent-light); }
.stage-tile.muted .tile-state { color: var(--text-disabled); }
.tile-state svg { flex-shrink: 0; }

@keyframes st-pulse {
  0%, 100% { box-shadow: 0 0 0 1px var(--accent), 0 0 0 4px rgba(145,132,217,0.22); }
  50%      { box-shadow: 0 0 0 1px var(--accent-light), 0 0 0 8px rgba(145,132,217,0.05); }
}
.stage-tile.speaking .tile-portrait { animation: st-pulse 1.6s ease-in-out infinite; }
@media (prefers-reduced-motion: reduce) {
  .stage-tile.speaking .tile-portrait { animation: none; box-shadow: 0 0 0 1px var(--accent); }
}

.screen-share-stage {
  position: relative;
  padding: var(--sp-5);
  border-top: 1px solid var(--rule);
}
.screen-share-stage[hidden] { display: none; }
.screen-share-label {
  position: absolute;
  z-index: 1;
  top: calc(var(--sp-5) + var(--sp-3));
  left: calc(var(--sp-5) + var(--sp-3));
  padding: var(--sp-2) var(--sp-3);
  background: rgba(0,0,0,0.78);
  color: var(--text);
  font: 400 9.5px var(--font-mono);
  letter-spacing: 0.14em;
}
.screen-share-stage video {
  display: block;
  width: 100%;
  max-height: 56vh;
  background: #000;
  object-fit: contain;
}

/* ---------- messages ---------- */

.messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--sp-7) var(--sp-8);
}
.msg {
  display: flex;
  gap: var(--sp-5);
  margin-bottom: var(--sp-6);
}
.msg .avatar-grid { margin-top: 2px; flex-shrink: 0; }
.msg-body { min-width: 0; }
.msg-name-row {
  display: flex;
  align-items: baseline;
  gap: var(--sp-4);
}
.msg-username { font: 500 13px var(--font-body); color: var(--text); }
.msg-time {
  font: 400 10px var(--font-mono);
  letter-spacing: 0.1em;
  color: var(--text-faint);
}
.msg-text {
  font: 400 14px var(--font-body);
  color: var(--text-body);
  text-wrap: pretty;
  margin-top: 2px;
  word-break: break-word;
  white-space: pre-wrap;
}

.system {
  font: 400 13px var(--font-body);
  font-style: italic;
  color: var(--text-dim);
  margin-bottom: var(--sp-4);
}

/* ---------- composer ---------- */

.chat-form {
  display: flex;
  border-top: 1px solid var(--rule);
}
.chat-form input {
  flex: 1;
  min-width: 0;
  background: transparent;
  border: none;
  border-radius: 0;
  color: var(--text);
  font: 400 14px var(--font-body);
  padding: var(--sp-6) var(--sp-8);
}
.chat-form input::placeholder { color: var(--text-faint); }
.chat-form button {
  background: transparent;
  color: var(--text);
  border: none;
  border-left: 1px solid var(--rule);
  border-radius: 0;
  padding: 0 var(--sp-8);
  font: 500 10.5px var(--font-mono);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  cursor: pointer;
}
.chat-form button:hover { background: #fff; color: #000; }

/* ---------- landing / gone splash ---------- */

.splash {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--sp-8) var(--sp-6);
}
.splash-card {
  max-width: 420px;
  text-align: center;
}
.splash-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-stretch: 125%;
  font-size: 34px;
  line-height: 1.05;
  letter-spacing: -0.005em;
  text-transform: uppercase;
  color: var(--text);
  margin: var(--sp-4) 0 0;
}
.splash-copy {
  font: 400 14px var(--font-body);
  color: var(--text-muted);
  line-height: 1.5;
  margin: var(--sp-6) 0 0;
}
.splash-submit {
  display: inline-block;
  margin: var(--sp-7) 0 0;
  padding: var(--sp-4) var(--sp-7);
  font-size: 11.5px;
  text-decoration: none;
}
.splash-fineprint {
  font: 400 10.5px var(--font-mono);
  letter-spacing: 0.08em;
  color: var(--text-faint);
  margin: var(--sp-6) 0 0;
}

/* ---------- mobile ---------- */

@media (min-width: 761px) and (max-width: 1050px) {
  .stage-status { flex-wrap: wrap; }
  .stage-controls {
    width: 100%;
    margin-left: 0;
  }
  .ctrl-btn {
    flex: 1;
    padding-right: var(--sp-2);
    padding-left: var(--sp-2);
  }
}

@media (max-width: 760px) {
  .app { flex-direction: column; }
  .sidebar { display: none; }
  .main { width: 100%; }

  ::-webkit-scrollbar { display: none; }

  .mobile-header {
    display: block;
    padding: 18px 18px 14px;
    border-bottom: 1px solid var(--rule);
    flex-shrink: 0;
  }
  .mobile-top { display: flex; align-items: center; gap: var(--sp-3); }
  .mobile-back { display: inline-flex; color: var(--text-dim); }
  .mobile-title-row {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: var(--sp-4);
    margin-top: var(--sp-3);
  }
  .mobile-channel-title {
    font-family: var(--font-display);
    font-weight: 800;
    font-stretch: 118%;
    font-size: 25px;
    line-height: 1;
    letter-spacing: -0.005em;
    text-transform: uppercase;
    color: var(--text);
  }
  .mobile-online {
    font: 400 9.5px var(--font-mono);
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-dim);
    white-space: nowrap;
  }

  .channel-header { display: none; }

  .stage-status { padding: var(--sp-4) 18px; flex-wrap: wrap; }
  .stage-controls { display: none; }

  .stage-tiles {
    display: flex;
    overflow-x: auto;
    grid-template-columns: none;
  }
  .stage-tile {
    flex: 1 0 25%;
    min-width: 92px;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--sp-3);
    padding: var(--sp-5) var(--sp-3);
  }
  .tile-name { font-size: 11.5px; }
  .tile-state { font-size: 8.5px; }

  .screen-share-stage { padding: var(--sp-3); }
  .screen-share-label {
    top: calc(var(--sp-3) + var(--sp-2));
    left: calc(var(--sp-3) + var(--sp-2));
  }
  .screen-share-stage video { max-height: 42vh; }

  .mobile-actions {
    display: flex;
    border-top: 1px solid var(--rule);
    border-bottom: 1px solid var(--rule);
  }
  .mobile-action-btn {
    flex: 1;
    min-height: 48px;
    background: transparent;
    color: var(--text);
    border: none;
    border-left: 1px solid var(--rule);
    border-radius: 0;
    font: 400 11px var(--font-mono);
    letter-spacing: 0.14em;
    text-transform: uppercase;
    cursor: pointer;
  }
  .mobile-action-btn:first-child { border-left: none; }
  .mobile-action-btn:disabled { color: var(--text-disabled); }
  .mobile-action-btn.join-btn { background: #fff; color: #000; }
  .mobile-action-btn.join-btn.in-voice { background: transparent; color: var(--text); }

  .messages { padding: 18px; }
  .msg { gap: var(--sp-5); margin-bottom: var(--sp-6); }
  .msg-username { font-size: 13px; }
  .msg-text { font-size: 14px; }

  .chat-form { min-height: 52px; }
  .chat-form input { padding: var(--sp-6) 20px; }
  .chat-form button { padding: 0 20px; }
}