:root {
  color-scheme: dark;
  --bg: #080a0f;
  --panel: #11141c;
  --text: #f6f7fb;
  --muted: #949baa;
  --line: rgba(255,255,255,.08);
  --accent: #7c5cff;
  --accent-2: #35d6c1;
  --danger: #ff475f;
  --shadow: 0 24px 80px rgba(0,0,0,.38);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 15% -10%, rgba(124,92,255,.18), transparent 32rem),
    radial-gradient(circle at 90% 0%, rgba(53,214,193,.10), transparent 28rem),
    var(--bg);
  color: var(--text);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
button, input { font: inherit; }
button { color: inherit; }

.app-shell { width: min(1480px, calc(100% - 40px)); margin: 0 auto; }
.topbar {
  min-height: 82px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 24px;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(20px);
  background: linear-gradient(to bottom, rgba(8,10,15,.96), rgba(8,10,15,.82));
  border-bottom: 1px solid var(--line);
}
.brand { display: inline-flex; align-items: center; gap: 11px; color: var(--text); text-decoration: none; font-weight: 800; }
.brand-mark { width: 34px; height: 34px; display: grid; place-items: center; border-radius: 10px; background: linear-gradient(135deg, var(--accent), #9f8cff); box-shadow: 0 10px 30px rgba(124,92,255,.35); }
.nav-tabs { display: flex; padding: 5px; border: 1px solid var(--line); background: rgba(255,255,255,.035); border-radius: 999px; }
.nav-tab { border: 0; background: transparent; padding: 9px 16px; border-radius: 999px; color: var(--muted); cursor: pointer; }
.nav-tab.active { color: var(--text); background: rgba(255,255,255,.09); }
.search-box { justify-self: end; width: min(260px, 100%); display: flex; align-items: center; gap: 8px; padding: 10px 13px; border-radius: 13px; background: rgba(255,255,255,.045); border: 1px solid var(--line); color: var(--muted); }
.search-box input { width: 100%; border: 0; outline: 0; background: transparent; color: var(--text); }

main { padding: 28px 0 70px; }
.player-sticky-wrap { position: sticky; top: 94px; z-index: 20; }
.player-card { background: rgba(10,12,18,.96); border: 1px solid var(--line); border-radius: 22px; overflow: hidden; box-shadow: var(--shadow); backdrop-filter: blur(18px); }
.player-frame { aspect-ratio: 16 / 9; position: relative; background: #000; }
.player-frame iframe { width: 100%; height: 100%; border: 0; display: none; background: #000; }
.player-frame.has-source iframe { display: block; }
.player-frame.has-source .player-placeholder { display: none; }
.player-placeholder { position: absolute; inset: 0; display: grid; place-content: center; text-align: center; padding: 28px; background: radial-gradient(circle at 50% 35%, rgba(124,92,255,.15), transparent 30%), #05070b; }
.player-placeholder h1 { margin: 12px 0 6px; font-size: clamp(25px, 4vw, 48px); }
.player-placeholder p { color: var(--muted); margin: 0; }
.signal-icon { font-size: 34px; color: var(--accent-2); filter: drop-shadow(0 0 18px rgba(53,214,193,.55)); }
.now-playing { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 18px 22px; }
.now-playing h2 { margin: 8px 0 4px; font-size: 20px; }
.now-playing p { margin: 0; color: var(--muted); }
.live-pill { font-size: 10px; font-weight: 800; letter-spacing: .13em; padding: 5px 8px; border-radius: 999px; color: white; background: var(--danger); }
.icon-button { width: 43px; height: 43px; border-radius: 50%; border: 1px solid var(--line); background: rgba(255,255,255,.05); cursor: pointer; }
.icon-button:hover { background: rgba(255,255,255,.1); }

.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 18px; margin-bottom: 20px; }
.section-heading h2 { margin: 5px 0 0; font-size: 25px; }
.eyebrow { color: var(--accent-2); text-transform: uppercase; font-size: 11px; font-weight: 800; letter-spacing: .14em; }
.channel-count { color: var(--muted); font-size: 13px; }
.guide-section { margin-top: 38px; position: relative; z-index: 1; }
.channel-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.channel-card { position: relative; overflow: hidden; min-height: 205px; border-radius: 20px; border: 1px solid var(--line); background: var(--panel); cursor: pointer; transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease; }
.channel-card:hover { transform: translateY(-4px); border-color: rgba(124,92,255,.5); box-shadow: 0 18px 45px rgba(0,0,0,.25); }
.channel-art { height: 128px; display: grid; place-items: center; padding: 24px; background: linear-gradient(135deg, var(--card-a), var(--card-b)); }
.channel-logo { width: 76px; height: 76px; border-radius: 20px; display: grid; place-items: center; overflow: hidden; font-size: 21px; font-weight: 800; background: rgba(7,9,13,.5); border: 1px solid rgba(255,255,255,.16); backdrop-filter: blur(12px); }
.channel-logo img { width: 100%; height: 100%; object-fit: contain; padding: 8px; background: rgba(255,255,255,.94); }
.channel-content { padding: 16px; }
.channel-name-row { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.channel-name { font-weight: 750; font-size: 15px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.favorite-button { border: 0; background: transparent; color: var(--muted); cursor: pointer; font-size: 18px; padding: 2px; }
.favorite-button.active { color: #ffd166; }
.channel-meta { margin: 11px 0 0; color: #daddE6; font-size: 13px; }
.empty-state { padding: 60px 20px; text-align: center; color: var(--muted); border: 1px dashed var(--line); border-radius: 20px; }

@media (max-width: 1050px) {
  .topbar { grid-template-columns: 1fr auto; }
  .nav-tabs { grid-row: 2; grid-column: 1 / -1; justify-self: center; margin-bottom: 12px; }
  .player-sticky-wrap { top: 132px; }
  .channel-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 760px) {
  .app-shell { width: min(100% - 24px, 1480px); }
  .topbar { min-height: 72px; gap: 12px; }
  .search-box { width: 46px; padding: 10px 13px; transition: width .2s ease; }
  .search-box:focus-within { width: 190px; }
  .search-box input { min-width: 0; }
  .nav-tabs { width: 100%; overflow-x: auto; justify-content: flex-start; }
  main { padding-top: 18px; }
  .player-sticky-wrap { top: 122px; }
  .channel-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 480px) {
  .brand span:last-child { display: none; }
  .player-sticky-wrap { position: relative; top: auto; }
  .channel-grid { grid-template-columns: 1fr; }
  .channel-card { min-height: 195px; }
}