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

:root {
  --bg: #0f0f13;
  --surface: #1a1a24;
  --surface2: #242435;
  --primary: #7c5cfc;
  --primary-hover: #6a4ae8;
  --danger: #e84057;
  --text: #e8e8f0;
  --text-dim: #8888a0;
  --border: #2a2a3d;
  --live: #e84057;
  --watching: #4caf50;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow: hidden;
}

.screen {
  display: none;
  height: 100vh;
  flex-direction: column;
}

.screen.active {
  display: flex;
}

/* Home Screen */
#home-screen {
  align-items: center;
  justify-content: center;
}

.container {
  text-align: center;
  max-width: 420px;
  padding: 40px;
}

h1 {
  font-size: 3rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}

.subtitle {
  color: var(--text-dim);
  margin-bottom: 48px;
  font-size: 1.1rem;
}

.actions {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  border: none;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

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

.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(124, 92, 252, 0.4);
}

.btn-secondary {
  background: var(--surface2);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--border);
}

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

.btn-danger:hover {
  background: #d63050;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.85rem;
  border-radius: 8px;
}

.btn-icon {
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  padding: 6px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  transition: all 0.2s;
}

.btn-icon:hover {
  color: var(--text);
  background: var(--surface2);
}

.divider {
  display: flex;
  align-items: center;
  gap: 16px;
  color: var(--text-dim);
}

.divider::before,
.divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.join-section {
  display: flex;
  gap: 10px;
}

.join-section input {
  flex: 1;
  padding: 14px 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text);
  font-size: 1.1rem;
  text-align: center;
  letter-spacing: 4px;
  text-transform: uppercase;
  font-weight: 700;
}

.join-section input::placeholder {
  letter-spacing: 1px;
  text-transform: none;
  font-weight: 400;
  color: var(--text-dim);
}

.join-section input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(124, 92, 252, 0.2);
}

/* Quality Selector */
.quality-selector {
  text-align: left;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px;
}

.quality-selector > label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 10px;
}

.quality-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.quality-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 10px 8px;
  background: var(--surface2);
  border: 2px solid transparent;
  border-radius: 10px;
  color: var(--text);
  cursor: pointer;
  transition: all 0.2s;
}

.quality-btn:hover {
  border-color: var(--border);
}

.quality-btn.active {
  border-color: var(--primary);
  background: rgba(124, 92, 252, 0.12);
}

.quality-label {
  font-weight: 700;
  font-size: 0.95rem;
}

.quality-detail {
  font-size: 0.7rem;
  color: var(--text-dim);
}

.fps-selector {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

.fps-selector label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.fps-options {
  display: flex;
  gap: 6px;
}

.fps-btn {
  padding: 6px 16px;
  background: var(--surface2);
  border: 2px solid transparent;
  border-radius: 8px;
  color: var(--text);
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s;
}

.fps-btn:hover {
  border-color: var(--border);
}

.fps-btn.active {
  border-color: var(--primary);
  background: rgba(124, 92, 252, 0.12);
}

/* Toolbar */
.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 20px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  z-index: 10;
}

.toolbar-left,
.toolbar-center,
.toolbar-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.toolbar-left {
  min-width: 160px;
}

.toolbar-right {
  min-width: 160px;
  justify-content: flex-end;
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.status-dot.live {
  background: var(--live);
  animation: pulse 1.5s infinite;
}

.status-dot.watching {
  background: var(--watching);
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.room-code-display {
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: 4px;
  color: var(--primary);
  background: var(--surface2);
  padding: 4px 16px;
  border-radius: 8px;
}

.quality-badge {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
  background: var(--surface2);
  color: var(--primary);
  text-transform: uppercase;
}

#viewer-count {
  color: var(--text-dim);
  font-size: 0.9rem;
}

/* Video */
.video-container {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #000;
  position: relative;
  overflow: hidden;
}

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

.viewer-status {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: var(--text-dim);
  font-size: 1.2rem;
  display: none;
}

.viewer-status.show {
  display: block;
}

/* Volume Control */
.volume-control {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 20px;
  background: var(--surface);
  border-top: 1px solid var(--border);
  color: var(--text-dim);
}

.volume-control input[type="range"] {
  flex: 1;
  max-width: 200px;
  height: 4px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--border);
  border-radius: 2px;
  outline: none;
}

.volume-control input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
}

/* Toast notification */
.toast {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--surface2);
  color: var(--text);
  padding: 12px 24px;
  border-radius: 10px;
  border: 1px solid var(--border);
  font-size: 0.9rem;
  opacity: 0;
  transition: all 0.3s;
  z-index: 100;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* Responsive */
@media (max-width: 480px) {
  .container {
    padding: 24px;
  }

  h1 {
    font-size: 2.2rem;
  }

  .toolbar {
    padding: 8px 12px;
    font-size: 0.85rem;
  }

  .toolbar-left {
    min-width: auto;
  }

  .toolbar-right {
    min-width: auto;
  }

  .room-code-display {
    font-size: 1rem;
    padding: 4px 10px;
  }
}