:root {
  --bg: #0c0f12;
  --panel: #141a20;
  --panel-strong: #1b232b;
  --border: #26323c;
  --text: #e7edf3;
  --muted: #93a3b1;
  --accent: #31c48d;
  --accent-strong: #25a475;
  --danger: #e5484d;
  --warn: #f0b429;
  --radius: 16px;
  --shadow: 0 12px 32px rgb(0 0 0 / 35%);
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  background: radial-gradient(1200px 800px at 50% -10%, #16202a 0%, var(--bg) 55%);
  color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  -webkit-font-smoothing: antialiased;
}

.hidden {
  display: none !important;
}

.screen {
  min-height: 100dvh;
}

/* ---------- Lobby ---------- */

.lobby {
  display: grid;
  place-items: center;
  padding: 24px 16px calc(24px + env(safe-area-inset-bottom));
}

.lobby-card {
  width: min(440px, 100%);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 28px 24px;
  box-shadow: var(--shadow);
}

h1 {
  margin: 0 0 8px;
  font-size: 1.6rem;
  letter-spacing: -0.02em;
}

.lead {
  margin: 0 0 24px;
  color: var(--muted);
  font-size: 0.95rem;
}

.field {
  display: block;
  margin-bottom: 16px;
}

.field span {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.field input {
  width: 100%;
  padding: 14px 16px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #0f151a;
  color: var(--text);
  font-size: 1.05rem;
  font-family: inherit;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

#room {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-weight: 600;
}

.field input:focus-visible {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgb(49 196 141 / 20%);
}

.field input::placeholder {
  color: #5d6b78;
  letter-spacing: normal;
  font-weight: 400;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 14px 18px;
  border: 1px solid transparent;
  border-radius: 12px;
  font: inherit;
  font-weight: 600;
  color: var(--text);
  background: var(--panel-strong);
  cursor: pointer;
  transition: transform 0.08s ease, background 0.15s ease, opacity 0.15s ease;
}

.button:active {
  transform: translateY(1px);
}

.button:disabled {
  opacity: 0.55;
  cursor: progress;
}

.button.primary {
  background: linear-gradient(180deg, var(--accent) 0%, var(--accent-strong) 100%);
  color: #06140e;
}

.button.ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}

.button.ghost:hover {
  background: #1a232b;
}

.button.small {
  width: auto;
  padding: 8px 14px;
  font-size: 0.85rem;
}

#create {
  margin-top: 12px;
}

.status {
  min-height: 1.4em;
  margin: 16px 0 0;
  color: var(--warn);
  font-size: 0.9rem;
}

.hint {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 0.82rem;
}

/* ---------- Call ---------- */

.call {
  display: flex;
  flex-direction: column;
  height: 100dvh;
  padding: 10px;
  gap: 10px;
}

.topbar {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 6px 6px 0;
}

.topbar-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.brand {
  color: var(--muted);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  text-align: center;
}

.room-info {
  display: flex;
  align-items: baseline;
  gap: 10px;
  min-width: 0;
}

.room-info .label {
  color: var(--muted);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

#room-code {
  font-size: 1.05rem;
  letter-spacing: 0.14em;
}

.badge {
  padding: 2px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--muted);
  font-size: 0.78rem;
  font-variant-numeric: tabular-nums;
}

.grid {
  flex: 1;
  min-height: 0;
  display: grid;
  gap: 10px;
  grid-auto-rows: 1fr;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
}

.tile {
  position: relative;
  min-height: 0;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: #05080a;
  cursor: zoom-in;
}

.tile video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  background: #05080a;
}

.tile.local video {
  transform: scaleX(-1);
}

.tile-bar {
  position: absolute;
  inset: auto 0 0 0;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  background: linear-gradient(180deg, transparent 0%, rgb(0 0 0 / 65%) 100%);
  font-size: 0.86rem;
  pointer-events: none;
}

.tile-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.dot {
  width: 8px;
  height: 8px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--warn);
  box-shadow: 0 0 0 3px rgb(240 180 41 / 18%);
}

.tile[data-state="connected"] .dot {
  background: var(--accent);
  box-shadow: 0 0 0 3px rgb(49 196 141 / 18%);
}

.tile[data-state="failed"] .dot,
.tile[data-state="disconnected"] .dot {
  background: var(--danger);
  box-shadow: 0 0 0 3px rgb(229 72 77 / 18%);
}

.tile-placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 16px;
  text-align: center;
  font-weight: 600;
  color: var(--muted);
  background: radial-gradient(circle at 50% 35%, #1a2530 0%, #0a0f13 70%);
}

.tile.has-video .tile-placeholder {
  display: none;
}

.tile .muted-mark {
  position: absolute;
  top: 10px;
  right: 10px;
  padding: 3px 8px;
  border-radius: 999px;
  background: rgb(0 0 0 / 55%);
  font-size: 0.78rem;
}

.controls {
  display: flex;
  justify-content: center;
  gap: 10px;
  padding: 4px 0 calc(4px + env(safe-area-inset-bottom));
}

.control {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 18px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--panel);
  color: var(--text);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.control:hover {
  background: var(--panel-strong);
}

.control[aria-pressed="false"] {
  border-color: var(--warn);
  color: var(--warn);
}

.control.danger {
  border-color: rgb(229 72 77 / 45%);
  color: #ffd7d8;
  background: rgb(229 72 77 / 14%);
}

.control.danger:hover {
  background: rgb(229 72 77 / 24%);
}

.control-icon {
  font-size: 1.05rem;
  line-height: 1;
}

.net-banner {
  padding: 8px 12px;
  border-radius: 10px;
  border: 1px solid rgb(240 180 41 / 35%);
  background: rgb(240 180 41 / 12%);
  color: var(--warn);
  font-size: 0.86rem;
  text-align: center;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: calc(88px + env(safe-area-inset-bottom));
  transform: translateX(-50%);
  width: min(520px, calc(100% - 32px));
  padding: 12px 16px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #1d262e;
  box-shadow: var(--shadow);
  text-align: center;
  font-size: 0.9rem;
}

/* ---------- Narrow screens ---------- */

@media (max-width: 560px) {
  .call {
    padding: 8px;
    gap: 8px;
  }

  .grid {
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 160px), 1fr));
    gap: 6px;
  }

  .control {
    padding: 12px 14px;
  }

  .control-label {
    display: none;
  }

  .control-icon {
    font-size: 1.3rem;
  }

  .topbar .button.small {
    padding: 8px 10px;
    font-size: 0.8rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
  }
}