/* ── Base ─────────────────────────────────────────── */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg: #0a0f1a;
  --card: #141d2b;
  --border: #1e2a3a;
  --cyan: #00d4ff;
  --cyan-dim: #00a5cc;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --danger: #ef4444;
  --success: #10b981;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

/* ── Presenter Page ──────────────────────────────── */
.presenter-container {
  text-align: center;
  padding: 2rem;
  max-width: 800px;
  width: 100%;
}

.logo {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--cyan);
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.logo span {
  color: var(--text);
  font-weight: 300;
}

.subtitle {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 2.5rem;
}

/* ── Buttons ─────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 2.5rem;
  border: none;
  border-radius: 12px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
}

.btn-primary {
  background: var(--cyan);
  color: var(--bg);
}

.btn-primary:hover {
  background: var(--cyan-dim);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(0, 212, 255, 0.3);
}

.btn-danger {
  background: var(--danger);
  color: white;
}

.btn-danger:hover {
  background: #dc2626;
}

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

/* ── Sharing Active Panel ────────────────────────── */
.sharing-panel {
  display: none;
  animation: fadeIn 0.3s ease;
}

.sharing-panel.active {
  display: block;
}

.start-panel {
  animation: fadeIn 0.3s ease;
}

.start-panel.hidden {
  display: none;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.room-code-display {
  background: var(--card);
  border: 2px solid var(--cyan);
  border-radius: 16px;
  padding: 2rem;
  margin: 1.5rem auto;
  max-width: 400px;
}

.room-code-label {
  color: var(--muted);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}

.room-code {
  font-size: 4rem;
  font-weight: 800;
  color: var(--cyan);
  letter-spacing: 0.3em;
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
}

.qr-container {
  margin: 1.5rem auto;
  background: white;
  border-radius: 12px;
  padding: 1rem;
  display: inline-block;
}

.qr-container canvas {
  display: block;
}

.viewer-url {
  color: var(--muted);
  font-size: 0.85rem;
  margin: 1rem 0;
  word-break: break-all;
}

.viewer-url a {
  color: var(--cyan);
  text-decoration: none;
}

.viewer-url a:hover {
  text-decoration: underline;
}

/* ── Stats Bar ───────────────────────────────────── */
.stats-bar {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin: 1.5rem 0;
}

.stat {
  text-align: center;
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--cyan);
}

.stat-label {
  font-size: 0.75rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ── Preview ─────────────────────────────────────── */
.preview-container {
  margin: 1.5rem auto;
  max-width: 500px;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
}

.preview-container video {
  width: 100%;
  display: block;
  background: #000;
}

.preview-label {
  color: var(--muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.5rem;
  background: var(--card);
  text-align: center;
}

/* ── Viewer Page ─────────────────────────────────── */
.viewer-container {
  width: 100vw;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #000;
  position: relative;
}

.viewer-container video {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.viewer-status {
  text-align: center;
  padding: 2rem;
}

.viewer-status .icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.viewer-status h2 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.viewer-status p {
  color: var(--muted);
  font-size: 0.95rem;
}

.fullscreen-hint {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(20, 29, 43, 0.9);
  color: var(--muted);
  padding: 0.5rem 1.2rem;
  border-radius: 8px;
  font-size: 0.8rem;
  opacity: 1;
  transition: opacity 2s ease;
  pointer-events: none;
}

.fullscreen-hint.hidden {
  opacity: 0;
}

/* ── Join Form ───────────────────────────────────── */
.join-container {
  text-align: center;
  padding: 2rem;
}

.join-container h1 {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  color: var(--cyan);
}

.code-input {
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  letter-spacing: 0.3em;
  width: 250px;
  padding: 0.8rem 1rem;
  background: var(--card);
  border: 2px solid var(--border);
  border-radius: 12px;
  color: var(--text);
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  text-transform: uppercase;
  outline: none;
  transition: border-color 0.2s ease;
}

.code-input:focus {
  border-color: var(--cyan);
}

.code-input::placeholder {
  color: var(--muted);
  font-size: 1.2rem;
  letter-spacing: 0.1em;
}

.join-btn {
  display: block;
  margin: 1.5rem auto 0;
}

.error-msg {
  color: var(--danger);
  margin-top: 1rem;
  font-size: 0.9rem;
  display: none;
}

.error-msg.show {
  display: block;
}

/* ── Auth Box ────────────────────────────────────── */
.auth-box {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2.5rem 2rem;
  max-width: 400px;
  margin: 0 auto;
  text-align: center;
}

.auth-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

#authPanel.hidden {
  display: none;
}

/* ── Responsive ──────────────────────────────────── */
@media (max-width: 600px) {
  .room-code {
    font-size: 2.8rem;
  }

  .btn {
    padding: 0.8rem 1.8rem;
    font-size: 1rem;
  }

  .stats-bar {
    gap: 1.5rem;
  }

  .code-input {
    font-size: 2rem;
    width: 200px;
  }
}