/* ==========================================================================
   TV LEANBACK UI - HISENSE 50Q6QV (VIDAA U9 OS)
   Optimizaciones:
   - 1080p Base / 10-foot UI scale
   - CERO 'backdrop-filter: blur()' para garantizar 60 FPS sin saturar la GPU
   - Renderizado con GPU transforms (translate3d)
   - Alto contraste para legibilidad a 3 metros
   ========================================================================== */

:root {
  --bg-main: #050811;
  --panel-bg: rgba(10, 15, 29, 0.96);
  --panel-card: rgba(22, 30, 54, 0.88);
  --panel-card-hover: rgba(33, 44, 77, 0.95);
  --accent-cyan: #06b6d4;
  --accent-blue: #3b82f6;
  --accent-green: #10b981;
  --accent-yellow: #f59e0b;
  --accent-red: #ef4444;
  --text-primary: #ffffff;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --focus-glow: 0 0 0 3px #06b6d4, 0 8px 24px rgba(6, 182, 212, 0.35);
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  user-select: none;
  -webkit-user-select: none;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: var(--bg-main);
  color: var(--text-primary);
  font-family: var(--font-family);
  font-size: 18px;
}

/* ==========================================================================
   VIDEO CONTAINER
   ========================================================================== */
#video-wrapper {
  position: absolute;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 1;
  background-color: #000;
  display: flex;
  align-items: center;
  justify-content: center;
}

#video-player {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #000;
}

/* ==========================================================================
   OSD CANAL DRAWER (LATERAL IZQUIERDO)
   ========================================================================== */
#channel-drawer {
  position: absolute;
  top: 0;
  left: 0;
  width: 24rem;
  height: 100vh;
  z-index: 20;
  background-color: var(--panel-bg);
  border-right: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 12px 0 32px rgba(0, 0, 0, 0.85);
  display: flex;
  flex-direction: column;
  transform: translate3d(0, 0, 0);
  transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: transform;
}

#channel-drawer.hidden {
  transform: translate3d(-105%, 0, 0);
}

.drawer-header {
  padding: 1.8rem 1.6rem 1.2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: linear-gradient(180deg, rgba(20, 28, 50, 0.9) 0%, rgba(10, 15, 29, 0) 100%);
}

.brand-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.8rem;
}

.brand-badge {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--accent-cyan);
}

.brand-badge svg {
  width: 1.4rem;
  height: 1.4rem;
  fill: currentColor;
}

.category-tabs-wrapper {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding: 0.3rem 0;
}

.category-tabs-wrapper::-webkit-scrollbar {
  display: none;
}

.cat-tab {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.75rem;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-weight: 600;
  white-space: nowrap;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: all 0.18s ease;
  flex-shrink: 0;
}

.cat-tab.active {
  background: rgba(6, 182, 212, 0.22);
  color: #fff;
  border-color: var(--accent-cyan);
  box-shadow: 0 0 10px rgba(6, 182, 212, 0.35);
  font-weight: 700;
}

/* LISTA DE CANALES CON SCROLL SUAVE */
.channel-list-container {
  flex: 1;
  overflow-y: hidden;
  padding: 1rem 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  position: relative;
}

.channel-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1rem;
  background-color: var(--panel-card);
  border-radius: 10px;
  border: 2px solid transparent;
  transition: transform 0.15s ease, background-color 0.15s ease, border-color 0.15s ease;
}

.channel-item.selected {
  background-color: var(--panel-card-hover);
  border-color: var(--accent-cyan);
  box-shadow: var(--focus-glow);
  transform: translate3d(6px, 0, 0);
}

.channel-item.active-stream {
  border-left: 5px solid var(--accent-green);
}

.item-dial {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--accent-cyan);
  min-width: 2.2rem;
  text-align: center;
}

.channel-item.selected .item-dial {
  color: #fff;
}

.item-logo {
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 6px;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  flex-shrink: 0;
}

.item-logo img {
  max-width: 90%;
  max-height: 90%;
  object-fit: contain;
}

.item-logo .placeholder-icon {
  font-size: 1.1rem;
  color: var(--text-muted);
}

.item-info {
  flex: 1;
  min-width: 0;
}

.item-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.item-category {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.item-badge {
  font-size: 0.7rem;
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-weight: 700;
  text-transform: uppercase;
}

.item-badge.live {
  background-color: rgba(16, 185, 129, 0.2);
  color: var(--accent-green);
  border: 1px solid rgba(16, 185, 129, 0.4);
}

/* FOOTER DEL DRAWER CON GUÍA DE BOTONES */
.drawer-footer {
  padding: 1rem 1.4rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  background-color: rgba(6, 9, 18, 0.98);
  font-size: 0.8rem;
  color: var(--text-secondary);
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.help-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.key-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.6rem;
  padding: 0.15rem 0.4rem;
  background-color: rgba(255, 255, 255, 0.12);
  color: #fff;
  border-radius: 4px;
  font-weight: 700;
  font-size: 0.75rem;
}

/* ==========================================================================
   BANNER INFORMATIVO INFERIOR (MINI OSD)
   ========================================================================== */
#info-banner {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translate3d(-50%, 0, 0);
  z-index: 15;
  width: 90%;
  max-width: 60rem;
  background-color: var(--panel-bg);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 16px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.8);
  padding: 1.2rem 1.8rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
  will-change: transform, opacity;
}

#info-banner.hidden {
  transform: translate3d(-50%, 4rem, 0);
  opacity: 0;
  pointer-events: none;
}

.banner-dial {
  font-size: 3rem;
  font-weight: 900;
  color: var(--accent-cyan);
  line-height: 1;
  min-width: 4rem;
  text-align: center;
}

.banner-logo {
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 8px;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  flex-shrink: 0;
}

.banner-logo img {
  max-width: 90%;
  max-height: 90%;
  object-fit: contain;
}

.banner-details {
  flex: 1;
}

.banner-title {
  font-size: 1.6rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.2rem;
}

.banner-sub {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.banner-badge {
  background-color: rgba(6, 182, 212, 0.15);
  color: var(--accent-cyan);
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
}

/* ==========================================================================
   DIAL NUMÉRICO OVERLAY (CUANDO SE DIGITAN CANALES 0-9)
   ========================================================================== */
#numeric-dial-overlay {
  position: absolute;
  top: 3rem;
  right: 4rem;
  z-index: 30;
  background-color: rgba(10, 15, 29, 0.95);
  border: 2px solid var(--accent-cyan);
  border-radius: 12px;
  padding: 0.6rem 1.6rem;
  font-size: 3.2rem;
  font-weight: 900;
  color: var(--accent-cyan);
  box-shadow: var(--focus-glow);
  display: none;
  animation: dialPop 0.2s ease-out;
}

@keyframes dialPop {
  0% { transform: scale(0.85); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}

/* ==========================================================================
   RELOJ SUPERIOR DERECHO
   ========================================================================== */
#top-clock {
  position: absolute;
  top: 2rem;
  right: 3rem;
  z-index: 10;
  font-size: 1.4rem;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.8);
  background-color: rgba(10, 15, 29, 0.75);
  padding: 0.4rem 1rem;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

/* ==========================================================================
   SPINNER DE CARGA & MENSAJES DE ERROR
   ========================================================================== */
#loading-indicator {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 25;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.2rem;
  background-color: var(--panel-bg);
  padding: 2rem 3rem;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.85);
  pointer-events: none;
  transition: opacity 0.2s ease;
}

#loading-indicator.hidden {
  opacity: 0;
  pointer-events: none;
}

.spinner {
  width: 3.5rem;
  height: 3.5rem;
  border: 4px solid rgba(255, 255, 255, 0.15);
  border-top-color: var(--accent-cyan);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.loading-text {
  font-size: 1.15rem;
  font-weight: 600;
  color: #fff;
}

/* ==========================================================================
   PANEL DE DIAGNÓSTICO / INFO (TECLA AZUL O 'I')
   ========================================================================== */
#stats-overlay {
  position: absolute;
  top: 3rem;
  right: 3rem;
  width: 26rem;
  z-index: 28;
  background-color: rgba(10, 15, 29, 0.96);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 12px;
  padding: 1.4rem;
  font-size: 0.85rem;
  display: none;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.85);
}

.stats-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent-cyan);
  margin-bottom: 0.8rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.stats-row {
  display: flex;
  justify-content: space-between;
  padding: 0.3rem 0;
  color: var(--text-secondary);
}

.stats-val {
  font-weight: 600;
  color: #fff;
}