/* Studio Stream — Web Player */

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

:root {
  --bg: #0a0a0f;
  --panel: #141420;
  --border: #2a2a40;
  --accent: #4a9eff;
  --accent-glow: rgba(74, 158, 255, 0.3);
  --green: #22c55e;
  --meter-bg: #1a1a2e;
  --text: #e2e8f0;
  --muted: #64748b;
  --font: 'Inter', 'Segoe UI', system-ui, sans-serif;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  height: 100vh;
  display: grid;
  grid-template-rows: 1fr auto;
  overflow: hidden;
}

/* ── Video area ────────────────────────────────────────── */

#video-wrap {
  position: relative;
  background: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 0;    /* allow grid track to shrink below intrinsic video height */
  overflow: hidden; /* clip video so it cannot expand the grid row beyond 1fr  */
}

#video-el {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

#status-overlay {
  position: absolute;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(10, 10, 15, 0.85);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 6px 16px;
  font-size: 13px;
  color: var(--muted);
  backdrop-filter: blur(8px);
  pointer-events: none;
  white-space: nowrap;
}

#status-overlay.connected {
  color: var(--green);
  border-color: rgba(34, 197, 94, 0.4);
}

/* ── Control bar ───────────────────────────────────────── */

#controls {
  background: var(--panel);
  border-top: 1px solid var(--border);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  gap: 24px;
}

/* Start audio button — shown when AudioContext needs a user gesture */
#start-audio-btn {
  padding: 6px 16px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  box-shadow: 0 0 10px var(--accent-glow);
  flex-shrink: 0;
}

#start-audio-btn:hover {
  filter: brightness(1.15);
}

/* Volume */
.control-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.control-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
}

.control-value {
  font-size: 11px;
  color: var(--muted);
  white-space: nowrap;   /* "1000 ms" must never wrap to a second line */
  overflow: hidden;
  min-width: 3.5em;      /* reserve space for "1000 ms" so layout stays stable */
  flex-shrink: 0;
}

#volume {
  -webkit-appearance: none;
  width: 120px;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  cursor: pointer;
  outline: none;
}

#volume::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 6px var(--accent-glow);
  cursor: pointer;
}

/* VU Meters */
.meters {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
  max-width: 300px;
}

.meter-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.meter-ch {
  font-size: 10px;
  font-weight: 700;
  color: var(--muted);
  width: 10px;
}

.meter-track {
  flex: 1;
  height: 6px;
  background: var(--meter-bg);
  border-radius: 3px;
  overflow: hidden;
}

.meter-fill {
  height: 100%;
  width: 0%;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--green) 0%, #eab308 75%, #ef4444 100%);
  background-size: 300px 100%;
  transition: width 50ms ease-out;
}

/* Stats */
.stats {
  display: flex;
  gap: 16px;
  margin-left: auto;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

.stat-label {
  font-size: 10px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.stat-value {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

/* ── Connecting overlay ────────────────────────────────── */

#connecting-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  gap: 16px;
}

#connecting-overlay.hidden { display: none; }

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.connecting-text {
  font-size: 16px;
  color: var(--muted);
}

.session-id {
  font-size: 12px;
  color: var(--border);
  font-family: monospace;
}

/* ── Responsive ────────────────────────────────────────── */

@media (max-width: 600px) {
  #controls {
    flex-wrap: wrap;
    gap: 8px 12px;
    padding: 8px 12px;
    /* Height is driven by content rows; nowrap on values keeps it stable */
  }

  #start-audio-btn {
    flex-shrink: 0;   /* never squeeze the button */
    order: -1;        /* always first in the flex row */
  }

  #volume { width: 70px; }
  #buffer-target { width: 70px; }

  /* Meters expand to fill any leftover row space */
  .meters { flex: 1; min-width: 120px; max-width: none; }

  /* Stats wrap alongside meters; keep them visible (just smaller) */
  .stats { margin-left: 0; gap: 10px; }
  .stat-value { font-size: 11px; }
}