:root {
  --bg: #0f1115;
  --panel: #1a1d24;
  --panel-2: #232730;
  --border: #2a2e38;
  --text: #e6e8eb;
  --muted: #9aa0aa;
  --accent: #4a7cff;
  --accent-hover: #3a6cef;
  --danger: #d64545;
  --danger-hover: #c03535;
  --speaking: #4ade80;
}

* { box-sizing: border-box; }

/* Ensure the `hidden` attribute wins over ID-level display rules below. */
[hidden] { display: none !important; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu,
    Cantarell, "Helvetica Neue", sans-serif;
  min-height: 100vh;
}

h1, h2 { margin: 0; font-weight: 600; letter-spacing: -0.01em; }

/* --- Join view --- */

#join-view {
  display: grid;
  place-items: center;
  min-height: 100vh;
  padding: 24px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px;
  width: 100%;
  max-width: 440px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.35);
}

.panel h1 {
  font-size: 26px;
  margin-bottom: 4px;
}

.subtitle {
  color: var(--muted);
  margin: 0 0 24px 0;
  font-size: 13px;
}

.panel label {
  display: block;
  font-size: 12px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 14px;
}

input, select, button {
  font-family: inherit;
}

input[type="text"], select {
  display: block;
  width: 100%;
  margin-top: 6px;
  padding: 10px 12px;
  background: #0f1115;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

input[type="text"]:focus, select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(74, 124, 255, 0.2);
}

.hint {
  display: block;
  margin-top: 6px;
  font-size: 11px;
  color: var(--muted);
  text-transform: none;
  letter-spacing: 0;
}

button {
  cursor: pointer;
  border: none;
  border-radius: 8px;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 500;
  color: white;
  transition: background 0.15s ease, transform 0.05s ease;
}
button:active { transform: translateY(1px); }
button:disabled { opacity: 0.6; cursor: not-allowed; }

.primary { background: var(--accent); width: 100%; margin-top: 8px; padding: 12px 16px; }
.primary:hover:not(:disabled) { background: var(--accent-hover); }

.ghost {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
}
.ghost:hover:not(:disabled) { background: #2e333e; }

.danger { background: var(--danger); }
.danger:hover:not(:disabled) { background: var(--danger-hover); }

/* --- Room view --- */

#room-view {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

#room-view header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  gap: 16px;
  flex-wrap: wrap;
}

.room-meta {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.room-meta h2 {
  font-size: 18px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.invite {
  display: flex;
  gap: 6px;
  align-items: center;
}

.invite input {
  width: 280px;
  max-width: 40vw;
  font-size: 12px;
  padding: 6px 8px;
  background: #0f1115;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 6px;
}

.invite button {
  padding: 6px 10px;
  font-size: 12px;
}

.controls {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.controls label.inline {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin: 0;
}

.controls select {
  width: auto;
  min-width: 160px;
  margin: 0;
  padding: 6px 8px;
  font-size: 13px;
}

#mute-btn.muted { background: #8a6a00; }
#mute-btn.muted:hover { background: #a07d00; }

main {
  flex: 1;
  padding: 24px;
}

#participants-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}

.participant-card {
  background: var(--panel);
  border: 2px solid var(--border);
  border-radius: 16px;
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  transition: border-color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease,
    background 0.18s ease;
}

.participant-card.speaking {
  border-color: var(--speaking);
  background: #1b2a21;
  box-shadow: 0 0 0 4px rgba(74, 222, 128, 0.18),
              0 0 32px rgba(74, 222, 128, 0.35);
  transform: translateY(-2px);
}

.avatar {
  width: 84px;
  height: 84px;
  border-radius: 50%;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 28px;
  color: white;
  user-select: none;
  position: relative;
  transition: transform 0.18s ease;
}

.participant-card.speaking .avatar {
  transform: scale(1.05);
}

.participant-card.muted .avatar::after {
  content: "";
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 2px solid var(--danger);
  opacity: 0.7;
}

.participant-card .name {
  font-size: 15px;
  font-weight: 500;
  max-width: 100%;
  text-align: center;
  overflow-wrap: anywhere;
}

.participant-card .status {
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

#audio-sink { display: none; }

@media (max-width: 640px) {
  .invite input { width: 180px; }
  #room-view header { padding: 12px 16px; }
  main { padding: 16px; }
}