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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--tg-theme-bg-color, #f5f5f5);
  color: var(--tg-theme-text-color, #222);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 0 16px 24px;
}

#app {
  width: 100%;
  max-width: 400px;
}

/* Tabs */
#tabs {
  display: flex;
  gap: 4px;
  padding: 12px 0;
  position: sticky;
  top: 0;
  background: var(--tg-theme-bg-color, #f5f5f5);
  z-index: 10;
}

.tab {
  flex: 1;
  padding: 10px;
  border: none;
  border-radius: 10px;
  background: var(--tg-theme-secondary-bg-color, #fff);
  color: var(--tg-theme-hint-color, #888);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.tab.active {
  background: var(--tg-theme-button-color, #3390ec);
  color: var(--tg-theme-button-text-color, #fff);
}

/* Content */
h1 {
  font-size: 48px;
  text-align: center;
  margin-bottom: 8px;
}

.subtitle {
  text-align: center;
  color: var(--tg-theme-hint-color, #888);
  font-size: 14px;
  margin-bottom: 24px;
}

#languages, #cameras {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.lang-btn, .cam-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border: none;
  border-radius: 12px;
  background: var(--tg-theme-secondary-bg-color, #fff);
  color: var(--tg-theme-text-color, #222);
  font-size: 16px;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
  text-align: left;
}

.lang-btn:active, .cam-btn:active {
  transform: scale(0.97);
}

.lang-btn .flag, .cam-btn .icon {
  font-size: 28px;
  flex-shrink: 0;
}

.lang-btn .name {
  flex: 1;
  text-align: left;
}

.cam-btn .cam-info {
  flex: 1;
}

.cam-btn .cam-name {
  font-weight: 600;
  font-size: 15px;
}

.cam-btn .cam-desc {
  font-size: 12px;
  color: var(--tg-theme-hint-color, #888);
  margin-top: 2px;
}

.cam-btn .cam-live {
  font-size: 11px;
  color: #e53935;
  font-weight: 700;
  flex-shrink: 0;
}

/* Section headers */
.section-header {
  font-size: 14px;
  font-weight: 700;
  color: var(--tg-theme-hint-color, #888);
  padding: 16px 0 4px;
}

.section-header:first-child {
  padding-top: 0;
}

/* Audio player */
.audio-player {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 32px 16px;
  gap: 8px;
}

.audio-icon {
  font-size: 56px;
  animation: pulse 2s ease-in-out infinite;
}

.audio-name {
  font-size: 18px;
  font-weight: 600;
}

.audio-status {
  font-size: 13px;
  color: var(--tg-theme-hint-color, #888);
  transition: color 0.3s;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.08); }
}

/* Player error */
.player-error {
  padding: 32px;
  text-align: center;
  color: var(--tg-theme-hint-color, #888);
  font-size: 14px;
  line-height: 1.5;
}

/* Greeting */
#greeting-screen {
  text-align: center;
  animation: fadeIn 0.4s ease;
}

#greeting-text {
  font-size: 36px;
  margin-bottom: 12px;
  animation: slideUp 0.5s ease;
}

#greeting-lang {
  margin-bottom: 32px;
}

/* Stream player */
#stream-player {
  animation: fadeIn 0.3s ease;
}

#player-container {
  width: 100%;
  border-radius: 12px;
  overflow: hidden;
  background: #000;
  margin-bottom: 12px;
}

#player-container video,
#player-container iframe {
  width: 100%;
  aspect-ratio: 16/9;
  display: block;
  border: none;
}

#stream-title {
  margin-bottom: 16px;
}

/* Button */
.btn {
  padding: 12px 24px;
  border: none;
  border-radius: 10px;
  background: var(--tg-theme-button-color, #3390ec);
  color: var(--tg-theme-button-text-color, #fff);
  font-size: 15px;
  cursor: pointer;
  transition: opacity 0.2s;
  display: block;
  margin: 0 auto;
}

.btn:active {
  opacity: 0.8;
}

.hidden {
  display: none !important;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}