:root {
  --bg: #0b0e14;
  --card-bg: rgba(20, 24, 34, 0.75);
  --border: rgba(255, 255, 255, 0.08);
  --text: #f4f5f7;
  --text-dim: #9aa1ae;
  --cyan: #22d3ee;
  --purple: #8b5cf6;
  --orange: #f97316;
  --gradient: linear-gradient(135deg, var(--cyan), var(--purple), var(--orange));
  --radius: 16px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  height: 100%;
}

.screen {
  display: none;
  min-height: 100vh;
  position: relative;
}
.screen.active { display: block; }

.bg-glow {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at 15% 20%, rgba(139, 92, 246, 0.25), transparent 40%),
    radial-gradient(circle at 85% 75%, rgba(34, 211, 238, 0.18), transparent 40%);
  z-index: 0;
}

.card {
  position: relative;
  z-index: 1;
  max-width: 420px;
  margin: 10vh auto;
  padding: 40px 32px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(20px);
  text-align: center;
}
.card-wide { max-width: 480px; }

.logo-icon { width: 72px; height: 72px; object-fit: contain; }
.logo-icon.small { width: 56px; height: 56px; }
.logo-icon.tiny { width: 32px; height: 32px; vertical-align: middle; margin-right: 8px; }

h1 { font-size: 28px; margin: 16px 0 4px; }
h2 { font-size: 22px; margin: 16px 0 4px; }
.subtitle { color: var(--text-dim); font-size: 14px; margin-bottom: 24px; }

.landing-actions { display: flex; flex-direction: column; gap: 12px; margin-top: 24px; }

.btn {
  border: none;
  border-radius: 10px;
  padding: 14px 20px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s ease, opacity 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn-primary { background: var(--gradient); color: #fff; }
.btn-ghost { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn-block { width: 100%; margin-top: 8px; }

.btn-back {
  position: absolute;
  top: 16px;
  left: 16px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 50%;
  width: 36px;
  height: 36px;
  cursor: pointer;
  z-index: 2;
}

.tabs { display: flex; gap: 8px; margin: 20px 0 16px; background: rgba(255,255,255,0.04); padding: 4px; border-radius: 10px; }
.tab {
  flex: 1;
  padding: 10px;
  background: transparent;
  border: none;
  color: var(--text-dim);
  border-radius: 8px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
}
.tab.active { background: var(--gradient); color: #fff; }

.tab-panel { display: none; text-align: left; }
.tab-panel.active { display: block; }

form { text-align: left; }
label { display: block; font-size: 13px; color: var(--text-dim); margin-bottom: 14px; }
input {
  width: 100%;
  margin-top: 6px;
  padding: 12px 14px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-size: 14px;
}
input:focus { outline: none; border-color: var(--purple); }

.error-msg { color: #f87171; font-size: 13px; min-height: 18px; margin-top: 8px; }

.badge {
  display: inline-block;
  margin-top: 16px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(139, 92, 246, 0.15);
  color: var(--purple);
  font-size: 12px;
  font-weight: 600;
}

.hint { color: var(--text-dim); font-size: 12px; margin-top: 20px; }

/* HOME */
.home-header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(11, 14, 20, 0.9);
  backdrop-filter: blur(10px);
  z-index: 5;
}
.brand-name { font-weight: 700; margin-right: auto; }
#search-input {
  flex: 1;
  max-width: 360px;
  margin: 0;
  padding: 10px 14px;
}
.btn-icon {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  width: 36px;
  height: 36px;
  cursor: pointer;
}

.category-tabs {
  display: flex;
  gap: 8px;
  padding: 16px 24px;
  overflow-x: auto;
}
.category-tabs button {
  flex-shrink: 0;
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.04);
  color: var(--text-dim);
  cursor: pointer;
  font-size: 13px;
}
.category-tabs button.active { background: var(--gradient); color: #fff; border-color: transparent; }

.channel-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 16px;
  padding: 0 24px 40px;
}
.channel-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.15s ease, border-color 0.15s ease;
}
.channel-card:hover { transform: translateY(-3px); border-color: var(--purple); }
.channel-card img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: contain;
  background: #060810;
}
.channel-card .name {
  padding: 10px 12px;
  font-size: 13px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.empty-state { text-align: center; color: var(--text-dim); padding: 60px 20px; }

/* PLAYER */
.screen-player { background: #000; }
#video { width: 100%; height: 100vh; background: #000; display: block; }
.btn-back-player { z-index: 10; background: rgba(0,0,0,0.5); }
.player-info {
  position: absolute;
  bottom: 24px;
  left: 24px;
  right: 24px;
  color: #fff;
  pointer-events: none;
}
.player-info h3 { margin: 0; text-shadow: 0 2px 8px rgba(0,0,0,0.8); }

@media (max-width: 640px) {
  .card { margin: 6vh 16px; padding: 28px 20px; }
  .home-header { flex-wrap: wrap; }
  #search-input { max-width: none; order: 3; flex-basis: 100%; }
}