/* ===== CSS Variables ===== */
:root {
  --bg-primary: #0a0a1a;
  --bg-secondary: #1a1a2e;
  --bg-card: rgba(255, 255, 255, 0.05);
  --bg-card-hover: rgba(255, 255, 255, 0.1);
  --bg-glass: rgba(255, 255, 255, 0.08);
  --bg-glass-strong: rgba(255, 255, 255, 0.12);
  --accent: #00d4ff;
  --accent-glow: rgba(0, 212, 255, 0.3);
  --accent-secondary: #ff6b35;
  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.7);
  --text-muted: rgba(255, 255, 255, 0.4);
  --border: rgba(255, 255, 255, 0.1);
  --border-hover: rgba(255, 255, 255, 0.2);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-pill: 50px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 20px var(--accent-glow);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --header-height: 64px;
  --tabs-height: 52px;
  --filters-height: 48px;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

input {
  font-family: inherit;
  border: none;
  background: none;
  color: inherit;
  outline: none;
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.25);
}

/* ===== Header ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  padding: 0 24px;
  background: rgba(10, 10, 26, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.4rem;
  font-weight: 700;
  white-space: nowrap;
}

.logo-img {
  width: 52px;
  height: 52px;
  object-fit: contain;
}

.logo-accent {
  color: var(--accent);
}

.header-center {
  flex: 1;
  max-width: 400px;
  margin: 0 24px;
}

.search-box {
  position: relative;
  display: flex;
  align-items: center;
  background: var(--bg-glass);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  padding: 0 16px;
  transition: var(--transition);
}

.search-box:focus-within {
  border-color: var(--accent);
  box-shadow: var(--shadow-glow);
}

.search-icon {
  font-size: 0.9rem;
  margin-right: 8px;
  opacity: 0.5;
}

#search-input {
  width: 100%;
  height: 38px;
  font-size: 0.9rem;
  color: var(--text-primary);
}

#search-input::placeholder {
  color: var(--text-muted);
}

.search-clear {
  font-size: 1.2rem;
  cursor: pointer;
  opacity: 0;
  transition: var(--transition);
  padding: 4px;
}

.search-clear.visible {
  opacity: 0.5;
}

.search-clear:hover {
  opacity: 1;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.channel-count {
  font-size: 0.85rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.btn-icon {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-size: 1.1rem;
  transition: var(--transition);
  background: var(--bg-glass);
}

.btn-icon:hover {
  background: var(--bg-glass-strong);
  transform: scale(1.05);
}

/* ===== Country Tabs ===== */
.country-tabs {
  position: sticky;
  top: var(--header-height);
  z-index: 90;
  background: rgba(10, 10, 26, 0.8);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.tabs-scroll {
  display: flex;
  overflow-x: auto;
  padding: 8px 24px;
  gap: 8px;
  scrollbar-width: none;
}

.tabs-scroll::-webkit-scrollbar {
  display: none;
}

.tab {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  font-weight: 500;
  background: var(--bg-glass);
  border: 1px solid transparent;
  transition: var(--transition);
  white-space: nowrap;
  cursor: pointer;
}

.tab:hover {
  background: var(--bg-glass-strong);
  border-color: var(--border-hover);
}

.tab.active {
  background: var(--accent);
  color: #000;
  font-weight: 600;
  border-color: var(--accent);
}

.tab-flag {
  font-size: 1.1rem;
}

/* ===== Category Filters ===== */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 12px 24px;
}

.filter-pill {
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  font-size: 0.8rem;
  font-weight: 500;
  background: var(--bg-glass);
  border: 1px solid var(--border);
  transition: var(--transition);
  cursor: pointer;
}

.filter-pill:hover {
  background: var(--bg-glass-strong);
  border-color: var(--border-hover);
}

.filter-pill.active {
  background: rgba(0, 212, 255, 0.15);
  border-color: var(--accent);
  color: var(--accent);
}

/* ===== Channel Grid ===== */
.channel-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
  padding: 16px 24px 40px;
  min-height: 300px;
}

.channel-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px 16px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: var(--transition);
  animation: cardFadeIn 0.4s ease both;
  outline: none;
}

.channel-card:hover,
.channel-card:focus-visible {
  background: var(--bg-card-hover);
  border-color: var(--accent);
  transform: translateY(-4px) scale(1.02);
  box-shadow: var(--shadow-glow), var(--shadow);
}

.channel-card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.channel-card.playing {
  border-color: var(--accent-secondary);
  box-shadow: 0 0 20px rgba(255, 107, 53, 0.3);
}

.card-logo-wrap {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-glass-strong);
  margin-bottom: 12px;
  flex-shrink: 0;
}

.card-logo {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 8px;
}

.card-letter {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent);
}

.card-name {
  font-size: 0.85rem;
  font-weight: 600;
  text-align: center;
  line-height: 1.3;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  word-break: break-word;
}

.card-badge {
  font-size: 0.7rem;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  background: rgba(0, 212, 255, 0.1);
  color: var(--accent);
  font-weight: 500;
  text-transform: capitalize;
}

.card-playing-indicator {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent-secondary);
  animation: pulse 1.5s infinite;
}

/* Broken channel card */
.channel-card.broken {
  opacity: 0.45;
}

.channel-card.broken:hover {
  opacity: 0.7;
}

.card-broken-badge {
  position: absolute;
  top: 8px;
  left: 8px;
  font-size: 0.6rem;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  background: rgba(255, 59, 48, 0.25);
  color: #ff6b6b;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Staggered animation */
@keyframes cardFadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== Loading Overlay ===== */
.loading-overlay {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: rgba(10, 10, 26, 0.9);
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

.loading-overlay.visible {
  opacity: 1;
  pointer-events: auto;
}

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

.loading-text {
  margin-top: 16px;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

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

/* ===== Error Banner ===== */
.error-banner {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  background: rgba(255, 59, 48, 0.9);
  backdrop-filter: blur(10px);
  border-radius: var(--radius);
  z-index: 300;
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  max-width: 90vw;
}

.error-banner.visible {
  transform: translateX(-50%) translateY(0);
}

.error-text {
  font-size: 0.85rem;
}

.error-close {
  font-size: 1.2rem;
  opacity: 0.7;
  cursor: pointer;
  padding: 4px;
}

.error-close:hover {
  opacity: 1;
}

/* ===== Video Player Overlay ===== */
.player-overlay {
  position: fixed;
  inset: 0;
  z-index: 150;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(10px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

.player-overlay.visible {
  opacity: 1;
  pointer-events: auto;
}

.player-container {
  width: 90vw;
  max-width: 960px;
  transform: translateY(30px);
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: var(--radius);
  overflow: hidden;
  background: #000;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.player-overlay.visible .player-container {
  transform: translateY(0);
}

.player-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: rgba(20, 20, 40, 0.95);
  border-bottom: 1px solid var(--border);
}

.player-channel-info {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.player-logo {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: contain;
  background: var(--bg-glass-strong);
  flex-shrink: 0;
}

.player-channel-name {
  font-size: 1rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.player-category {
  font-size: 0.75rem;
  color: var(--accent);
  text-transform: capitalize;
}

.player-controls {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.player-controls .btn-icon {
  width: 34px;
  height: 34px;
  font-size: 1rem;
}

.btn-close {
  font-size: 1.4rem !important;
}

.player-video-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #000;
}

#video-player {
  width: 100%;
  height: 100%;
  display: block;
}

.player-loading,
.player-error {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.7);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

.player-loading.visible,
.player-error.visible {
  opacity: 1;
  pointer-events: auto;
}

.player-error p {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.auto-skip-countdown {
  font-size: 0.8rem;
  color: var(--accent);
  margin-bottom: 12px;
}

.player-error-actions {
  display: flex;
  gap: 12px;
}

.btn-retry,
.btn-skip {
  padding: 8px 24px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 0.85rem;
  transition: var(--transition);
}

.btn-retry {
  background: var(--accent);
  color: #000;
}

.btn-skip {
  background: var(--bg-glass-strong);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-retry:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-glow);
}

.btn-skip:hover {
  transform: scale(1.05);
  background: var(--bg-glass);
}

/* ===== Shortcuts Modal ===== */
.shortcuts-modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

.shortcuts-modal.visible {
  opacity: 1;
  pointer-events: auto;
}

.shortcuts-content {
  position: relative;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 32px;
  max-width: 400px;
  width: 90vw;
}

.shortcuts-content h3 {
  font-size: 1.1rem;
  margin-bottom: 20px;
}

.modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 30px;
  height: 30px;
  font-size: 1.3rem;
}

.shortcut-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.shortcut-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  height: 26px;
  padding: 0 8px;
  border-radius: 6px;
  background: var(--bg-glass-strong);
  border: 1px solid var(--border);
  font-family: inherit;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* ===== Empty State ===== */
.empty-state {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  color: var(--text-muted);
}

.empty-state-icon {
  font-size: 3rem;
  margin-bottom: 16px;
}

.empty-state-text {
  font-size: 1rem;
}

/* ===== Pulse Animation ===== */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* ===== Responsive ===== */
@media (max-width: 1200px) {
  .channel-grid {
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  }
}

@media (max-width: 768px) {
  .header {
    padding: 0 16px;
  }

  .header-center {
    margin: 0 12px;
  }

  .logo {
    font-size: 1.1rem;
  }

  .logo-icon {
    display: none;
  }

  .channel-grid {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 12px;
    padding: 12px 16px 32px;
  }

  .channel-card {
    padding: 16px 12px 12px;
  }

  .card-logo-wrap {
    width: 56px;
    height: 56px;
  }

  .card-name {
    font-size: 0.8rem;
  }

  .tabs-scroll {
    padding: 8px 16px;
  }

  .filters {
    padding: 10px 16px;
  }

  .player-container {
    width: 100vw;
    max-width: 100vw;
    border-radius: 0;
  }

  .channel-count {
    display: none;
  }
}

@media (max-width: 480px) {
  .channel-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    padding: 10px 12px 32px;
  }

  .header-center {
    margin: 0 8px;
  }

  #btn-shortcuts {
    display: none;
  }
}