:root {
  color-scheme: dark;
  --bg-color: #070611;
  --text-primary: #f4f6ff;
  --text-secondary: #a7adc1;
  --card-bg: rgba(18, 22, 38, 0.88);
  --card-border: rgba(255, 255, 255, 0.08);
  --card-hover: rgba(255, 122, 26, 0.18);
  --accent: #ff7a1a;
  --accent-strong: #ff6100;
  --accent-soft: rgba(255, 122, 26, 0.16);
  --accent-soft-strong: rgba(255, 122, 26, 0.28);
  --player-bg: rgba(14, 18, 30, 0.92);
  --shadow: 0 28px 55px rgba(4, 8, 20, 0.55);
  --shadow-soft: 0 18px 30px rgba(8, 12, 26, 0.35);
  --radius-xl: 32px;
  --radius-lg: 26px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --backdrop: saturate(160%) blur(22px);
  --transition: 220ms ease;
  font-family: "Manrope", "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--bg-color);
  color: var(--text-primary);
  display: flex;
  justify-content: center;
  padding: 28px;
  position: relative;
  overflow-x: hidden;
  transition: background-color var(--transition), color var(--transition);
}

body::before,
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -2;
  transition: opacity var(--transition), transform var(--transition);
}

body::before {
  background:
    radial-gradient(120% 120% at 10% 10%, rgba(255, 122, 26, 0.22), transparent 60%),
    radial-gradient(120% 120% at 92% -10%, rgba(100, 74, 210, 0.28), transparent 70%),
    linear-gradient(165deg, rgba(9, 13, 32, 0.96), rgba(4, 7, 18, 0.94));
  z-index: -2;
}

body::after {
  background:
    radial-gradient(90% 90% at 0% 100%, rgba(255, 122, 26, 0.16), transparent 58%),
    linear-gradient(120deg, rgba(255, 255, 255, 0.06), transparent 70%);
  opacity: 0.7;
  z-index: -1;
}

body.light-theme {
  color-scheme: light;
  --shadow: 0 24px 46px rgba(15, 23, 42, 0.14);
  --shadow-soft: 0 18px 34px rgba(15, 23, 42, 0.12);
}

body.light-theme::before {
  background:
    radial-gradient(140% 140% at 20% -20%, rgba(255, 173, 94, 0.35), transparent 60%),
    radial-gradient(120% 120% at 100% 0%, rgba(118, 164, 255, 0.32), transparent 65%),
    linear-gradient(160deg, rgba(246, 250, 255, 0.98), rgba(233, 244, 255, 0.96));
}

body.light-theme::after {
  background:
    radial-gradient(90% 90% at 5% 95%, rgba(255, 173, 94, 0.22), transparent 55%),
    linear-gradient(110deg, rgba(255, 255, 255, 0.8), transparent 60%);
  opacity: 0.8;
}

main,
.app {
  width: min(1080px, 100%);
}

.app {
  display: flex;
  flex-direction: column;
  gap: 32px;
  position: relative;
  z-index: 1;
}

.app__header {
  background: linear-gradient(135deg, rgba(18, 22, 38, 0.92), rgba(12, 15, 30, 0.86));
  border: 1px solid var(--card-border);
  padding: 40px;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
  backdrop-filter: var(--backdrop);
  position: relative;
  overflow: hidden;
}

.app__header::before {
  content: "";
  position: absolute;
  inset: -40% -28% auto auto;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, var(--accent-soft-strong), transparent 70%);
  opacity: 0.9;
  z-index: 0;
}

.app__header::after {
  content: "";
  position: absolute;
  inset: auto -40% -60% auto;
  width: 580px;
  height: 580px;
  background: radial-gradient(circle, rgba(80, 54, 216, 0.18), transparent 70%);
  z-index: 0;
}

.app__header > * {
  position: relative;
  z-index: 1;
}

.app__hero {
  display: grid;
  grid-template-columns: minmax(240px, 300px) minmax(0, 1fr);
  gap: 36px;
  align-items: center;
}

.app__branding {
  display: flex;
  flex-direction: column;
  gap: 20px;
  align-items: flex-start;
}

.app__logo-wrap {
  position: relative;
  width: 120px;
  height: 120px;
  display: grid;
  place-items: center;
}

.app__logo-wrap::before {
  content: "";
  position: absolute;
  inset: 10%;
  background: radial-gradient(circle, rgba(255, 122, 26, 0.6), transparent 70%);
  filter: blur(18px);
  opacity: 0.8;
  z-index: 0;
}

.app__logo {
  width: 100%;
  height: 100%;
  border-radius: 28px;
  padding: 16px;
  background: rgba(9, 12, 26, 0.68);
  box-shadow: 0 22px 38px rgba(5, 9, 22, 0.6);
  position: relative;
  z-index: 1;
}

.app__branding-text {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-width: 280px;
}

.app__branding-eyebrow {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent);
}

.app__branding-title {
  margin: 0;
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  font-weight: 800;
}

.app__branding-subtitle {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.5;
}

.app__title-block {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.app__pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  align-self: flex-start;
  padding: 8px 18px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent-soft), rgba(255, 255, 255, 0.05));
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.75rem;
  font-weight: 700;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.app__title {
  margin: 0;
  font-size: clamp(2rem, 3.6vw, 2.8rem);
  line-height: 1.18;
}

.app__subtitle {
  margin: 0;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.app__highlights {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.app__highlight-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.app__highlight-item::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 6px var(--accent-soft);
  flex-shrink: 0;
}

.channel-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
}

.channel-card {
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  background: var(--card-bg);
  box-shadow: var(--shadow-soft);
  color: inherit;
  text-align: left;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: transform var(--transition), border-color var(--transition),
    box-shadow var(--transition), background-color var(--transition);
  position: relative;
  overflow: hidden;
  isolation: isolate;
  cursor: pointer;
}

.channel-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(150deg, rgba(255, 255, 255, 0.08), transparent 55%);
  opacity: 0;
  transition: opacity var(--transition);
  z-index: -1;
}

.channel-card::after {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  background: linear-gradient(140deg, var(--accent-soft-strong), transparent 65%);
  opacity: 0;
  transition: opacity var(--transition);
  z-index: -2;
}

.channel-card:hover,
.channel-card:focus-visible {
  transform: translateY(-6px);
  border-color: var(--accent);
  box-shadow: 0 26px 44px rgba(5, 9, 22, 0.45);
}

.channel-card:hover::before,
.channel-card:focus-visible::before,
.channel-card--active::before {
  opacity: 1;
}

.channel-card:hover::after,
.channel-card:focus-visible::after,
.channel-card--active::after {
  opacity: 1;
}

.channel-card--active {
  border-color: var(--accent);
  background: var(--card-hover);
}

.channel-card:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(255, 122, 26, 0.35), 0 26px 44px rgba(5, 9, 22, 0.45);
}

.channel-card__image {
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-md);
  object-fit: cover;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow: 0 16px 32px rgba(3, 6, 16, 0.45);
}

.channel-card__content {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.channel-card__badge {
  align-self: flex-start;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  background: var(--accent-soft);
  color: var(--accent);
}

.channel-card__title {
  margin: 0;
  font-size: 1.18rem;
  font-weight: 700;
}

.channel-card__description {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.45;
}

.channel-card__footer {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding-top: 8px;
  color: var(--accent);
}

.channel-card__cta {
  position: relative;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.channel-card__cta::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -3px;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
  opacity: 0;
  transform: translateY(4px);
  transition: opacity var(--transition), transform var(--transition);
}

.channel-card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--accent);
  transition: background-color var(--transition), color var(--transition);
}

.channel-card:hover .channel-card__cta::after,
.channel-card:focus-visible .channel-card__cta::after,
.channel-card--active .channel-card__cta::after {
  opacity: 1;
  transform: translateY(0);
}

.channel-card:hover .channel-card__icon,
.channel-card:focus-visible .channel-card__icon,
.channel-card--active .channel-card__icon {
  background: var(--accent);
  color: #fff;
}

.player {
  display: flex;
  flex-direction: column;
  gap: 20px;
  background: var(--player-bg);
  border-radius: var(--radius-xl);
  border: 1px solid var(--card-border);
  padding: 28px;
  box-shadow: var(--shadow);
  backdrop-filter: var(--backdrop);
  position: relative;
  overflow: hidden;
}

.player::before {
  content: "";
  position: absolute;
  inset: -30% -20% auto auto;
  width: 360px;
  height: 360px;
  background: radial-gradient(circle, var(--accent-soft), transparent 70%);
  opacity: 0.8;
  z-index: 0;
}

.player > * {
  position: relative;
  z-index: 1;
}

.player__head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
}

.player__meta {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.player__eyebrow {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--accent);
}

.player__title {
  margin: 0;
  font-size: 1.6rem;
  line-height: 1.3;
}

.player__tagline {
  margin: 0;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.player__actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.player__live-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.12);
}

.player__live-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--accent-strong);
  box-shadow: 0 0 0 4px rgba(255, 97, 0, 0.35);
  animation: player-live-pulse 1.8s ease-in-out infinite;
}

@keyframes player-live-pulse {
  0%,
  100% {
    box-shadow: 0 0 0 4px rgba(255, 97, 0, 0.35);
  }
  50% {
    box-shadow: 0 0 0 7px rgba(255, 97, 0, 0.18);
  }
}

.player__close {
  appearance: none;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.06);
  color: inherit;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  font-size: 1.1rem;
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: background-color var(--transition), color var(--transition), border-color var(--transition);
}

.player__close:hover,
.player__close:focus-visible {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  outline: none;
}

.player__stage {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #000;
  box-shadow: 0 24px 48px rgba(4, 8, 20, 0.6);
}

.player__video {
  width: 100%;
  max-height: 540px;
  aspect-ratio: 16 / 9;
  display: block;
  background: #000;
}

.player__description {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.55;
}

.empty-state {
  text-align: center;
  padding: 48px 24px;
  border-radius: var(--radius-lg);
  border: 1px dashed var(--card-border);
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.04);
}

@media (max-width: 1180px) {
  .channel-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 1024px) {
  body {
    padding: 24px;
  }

  .channel-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 920px) {
  .app__hero {
    grid-template-columns: 1fr;
  }

  .app__branding {
    flex-direction: row;
    align-items: center;
  }

  .app__branding-text {
    max-width: none;
  }
}

@media (max-width: 760px) {
  .app__header {
    padding: 32px 28px;
  }

  .channel-grid {
    gap: 20px;
  }
}

@media (max-width: 680px) {
  body {
    padding: 20px 14px;
  }

  .channel-grid {
    grid-template-columns: repeat(1, minmax(0, 1fr));
  }

  .app__branding {
    flex-direction: column;
    align-items: flex-start;
  }

  .player {
    padding: 22px;
  }

  .player__head {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .player__actions {
    width: 100%;
    justify-content: space-between;
  }
}

@media (max-width: 520px) {
  .app__highlights {
    gap: 10px;
  }

  .app__highlight-item {
    align-items: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
    scroll-behavior: auto !important;
  }
}