:root {
  --bg: #07111f;
  --bg-soft: #0f1b32;
  --card: rgba(15, 23, 42, 0.72);
  --card-solid: #111c34;
  --text: #e5eefb;
  --muted: #9fb0d1;
  --line: rgba(255, 255, 255, 0.1);
  --accent: #38bdf8;
  --accent-2: #8b5cf6;
  --danger: #fb7185;
}

html[data-theme='light'] {
  --bg: #f6f9ff;
  --bg-soft: #e7efff;
  --card: rgba(255, 255, 255, 0.97);
  --card-solid: #ffffff;
  --text: #020617;
  --muted: #1e293b;
  --line: rgba(15, 23, 42, 0.18);
  --accent: #0369a1;
  --accent-2: #5b21b6;
  --danger: #9f1239;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; background: radial-gradient(circle at top, var(--bg-soft), var(--bg)); color: var(--text); }
a { color: inherit; }
button, input, textarea { font: inherit; }
button { cursor: pointer; border: 0; }

.bg-grid {
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px),
    radial-gradient(circle at top right, rgba(56,189,248,0.18), transparent 25%),
    radial-gradient(circle at left bottom, rgba(139,92,246,0.16), transparent 22%);
  background-size: 24px 24px, 24px 24px, auto, auto;
}
html[data-theme='light'] .bg-grid {
  background-image:
    linear-gradient(rgba(15,23,42,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15,23,42,0.05) 1px, transparent 1px),
    radial-gradient(circle at top right, rgba(2,132,199,0.12), transparent 28%),
    radial-gradient(circle at left bottom, rgba(109,40,217,0.10), transparent 24%);
}

.glass, .content-card, .hero-card, .feature-card, .stat-card, .inner-card, .modal-card {
  background: var(--card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--line);
  box-shadow: 0 20px 60px rgba(0,0,0,0.18);
}

.content-card, .hero-card { border-radius: 1.75rem; padding: 1.5rem; }
.feature-card { border-radius: 1.5rem; padding: 1.25rem; }
.feature-card h2, .content-card h1, .content-card h2, .content-card h3, .hero-card h1 { margin: 0; color: var(--text); }
.content-card p, .content-card li, .feature-card p { color: var(--muted); line-height: 1.7; }
.content-card ul { padding-left: 1.2rem; }
.hero-card { background: linear-gradient(135deg, rgba(14,165,233,0.22), rgba(139,92,246,0.2)), var(--card); }

.primary-btn, .secondary-btn, .danger-btn, .tab-btn, .option-btn, .chip, .icon-btn, .tabbar-btn {
  transition: 180ms ease;
  border-radius: 999px;
  padding: 0.85rem 1.1rem;
  font-weight: 700;
}
.primary-btn { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: white; box-shadow: 0 12px 28px rgba(56,189,248,0.22); }
.primary-btn:hover { transform: translateY(-1px); filter: brightness(1.03); }
.secondary-btn, .tab-btn, .chip, .option-btn, .tabbar-btn { background: rgba(255,255,255,0.04); color: var(--text); border: 1px solid var(--line); }
.secondary-btn:hover, .tab-btn:hover, .chip:hover, .option-btn:hover, .tabbar-btn:hover { background: rgba(255,255,255,0.08); }
.danger-btn { background: rgba(244,63,94,0.12); color: #ffd7df; border: 1px solid rgba(244,63,94,0.35); }
.icon-btn { background: rgba(255,255,255,0.06); color: var(--text); padding: 0.65rem 0.9rem; }
html[data-theme='light'] .secondary-btn,
html[data-theme='light'] .tab-btn,
html[data-theme='light'] .chip,
html[data-theme='light'] .option-btn,
html[data-theme='light'] .tabbar-btn,
html[data-theme='light'] .icon-btn {
  background: rgba(255,255,255,0.92);
  border-color: rgba(15, 23, 42, 0.14);
  color: #0f172a;
}
html[data-theme='light'] .secondary-btn:hover,
html[data-theme='light'] .tab-btn:hover,
html[data-theme='light'] .chip:hover,
html[data-theme='light'] .option-btn:hover,
html[data-theme='light'] .tabbar-btn:hover,
html[data-theme='light'] .icon-btn:hover {
  background: #eff6ff;
}
html[data-theme='light'] .danger-btn {
  background: #ffe4ea;
  color: #881337;
  border-color: rgba(136, 19, 55, 0.26);
  box-shadow: 0 6px 18px rgba(159, 18, 57, 0.08);
}
html[data-theme='light'] .danger-btn:hover {
  background: #ffd6e0;
}

.tab-row { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.tab-btn.active, .chip.active, .tabbar-btn.active { background: linear-gradient(135deg, rgba(56,189,248,0.22), rgba(139,92,246,0.22)); color: white; border-color: rgba(56,189,248,0.45); }
html[data-theme='light'] .tab-btn.active,
html[data-theme='light'] .chip.active,
html[data-theme='light'] .tabbar-btn.active {
  background: linear-gradient(135deg, rgba(2,132,199,0.16), rgba(109,40,217,0.14));
  color: #0f172a;
  border-color: rgba(2,132,199,0.28);
}
.option-btn.selected { outline: 2px solid var(--accent); background: rgba(56,189,248,0.12); }

.label { display: block; font-size: 0.95rem; font-weight: 700; color: var(--text); margin-bottom: 0.5rem; }
.input, .textarea {
  width: 100%;
  border-radius: 1rem;
  border: 1px solid var(--line);
  background: rgba(2,6,23,0.35);
  color: var(--text);
  padding: 0.95rem 1rem;
  outline: none;
}
html[data-theme='light'] .input,
html[data-theme='light'] .textarea {
  background: #ffffff;
  border-color: rgba(15, 23, 42, 0.16);
  box-shadow: inset 0 1px 2px rgba(15, 23, 42, 0.04);
}
.textarea { min-height: 140px; resize: vertical; }
.input::placeholder, .textarea::placeholder { color: #94a3b8; }

.status-pill, .badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  border-radius: 999px;
  padding: 0.45rem 0.8rem;
  background: rgba(56,189,248,0.12);
  border: 1px solid rgba(56,189,248,0.28);
  color: #c6efff;
  font-size: 0.9rem;
  font-weight: 700;
}
html[data-theme='light'] .status-pill,
html[data-theme='light'] .badge {
  color: #075985;
  background: rgba(2, 132, 199, 0.12);
  border-color: rgba(2, 132, 199, 0.22);
}

.info-note, .result-box, .empty-state, .list-item, .stat-card {
  border-radius: 1.25rem;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.04);
}
html[data-theme='light'] .info-note,
html[data-theme='light'] .result-box,
html[data-theme='light'] .empty-state,
html[data-theme='light'] .list-item,
html[data-theme='light'] .stat-card,
html[data-theme='light'] .inner-card {
  background: rgba(255,255,255,0.92);
}
html[data-theme='light'] .content-card p,
html[data-theme='light'] .content-card li,
html[data-theme='light'] .feature-card p,
html[data-theme='light'] .muted,
html[data-theme='light'] .stat-label,
html[data-theme='light'] .empty-state,
html[data-theme='light'] .empty-state.small {
  color: #1e293b;
}
html[data-theme='light'] .content-card strong,
html[data-theme='light'] .feature-card h2,
html[data-theme='light'] .content-card h1,
html[data-theme='light'] .content-card h2,
html[data-theme='light'] .content-card h3,
html[data-theme='light'] .content-card h4,
html[data-theme='light'] .hero-card h1,
html[data-theme='light'] .stat-value {
  color: #020617;
}
.info-note { margin-top: 1rem; padding: 1rem 1.2rem; color: var(--text); }
.result-box { padding: 1rem 1.1rem; color: var(--text); }
.result-box.ok { border-color: rgba(74,222,128,0.35); background: rgba(34,197,94,0.08); }
.result-box.ng { border-color: rgba(251,113,133,0.35); background: rgba(244,63,94,0.08); }
.empty-state { padding: 2rem; text-align: center; color: var(--muted); }
.empty-state.small { padding: 1.25rem; }
.list-item { padding: 1rem 1.1rem; display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
.stat-card { padding: 1.25rem; }
.stat-label { color: var(--muted); font-size: 0.9rem; }
.stat-value { margin-top: 0.6rem; font-size: 2rem; font-weight: 900; color: var(--text); }
.stat-value span { margin-left: 0.35rem; font-size: 1rem; font-weight: 700; color: var(--muted); }
.inner-card { padding: 1.2rem; border-radius: 1.25rem; }
.muted { color: var(--muted); }

.featured-video iframe { display: block; }

.tabbar {
  position: fixed;
  left: 50%;
  bottom: 1rem;
  transform: translateX(-50%);
  width: min(96%, 920px);
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0.6rem;
  padding: 0.7rem;
  border-radius: 1.5rem;
  background: rgba(10, 15, 29, 0.75);
  border: 1px solid rgba(255,255,255,0.08);
  backdrop-filter: blur(20px);
  z-index: 30;
}
html[data-theme='light'] .tabbar {
  background: rgba(255,255,255,0.98);
  border: 1px solid rgba(15, 23, 42, 0.16);
  box-shadow: 0 16px 36px rgba(15, 23, 42, 0.12);
}
html[data-theme='light'] header.glass {
  background: rgba(255,255,255,0.98);
}
html[data-theme='light'] header.glass .text-cyan-300 {
  color: #0f766e;
}
html[data-theme='light'] header.glass .text-white,
html[data-theme='light'] header.glass .text-slate-300 {
  color: #020617;
}
.tabbar-btn { padding: 0.85rem 0.5rem; font-size: 0.92rem; }

.modal-backdrop {
  position: fixed; inset: 0; background: rgba(2,6,23,0.7);
  display: flex; align-items: center; justify-content: center; padding: 1rem; z-index: 50;
}
.modal-card {
  width: min(860px, 100%); max-height: 90vh; overflow: auto;
  border-radius: 1.75rem; padding: 1.5rem;
}

.hidden { display: none; }
.aspect-video { aspect-ratio: 16 / 9; }

@media (max-width: 1024px) {
  .tabbar { grid-template-columns: repeat(3, 1fr); }
}

html[data-theme='light'] .hero-card {
  background: linear-gradient(135deg, rgba(2,132,199,0.16), rgba(109,40,217,0.10)), #ffffff;
}
html[data-theme='light'] .hero-card .text-white,
html[data-theme='light'] .hero-card .text-slate-300 {
  color: #020617;
}
html[data-theme='light'] .content-card .bg-fuchsia-400\/20 {
  background: rgba(192, 38, 211, 0.14);
}
html[data-theme='light'] .content-card .text-fuchsia-200 {
  color: #86198f;
}
html[data-theme='light'] .content-card .text-white {
  color: #020617;
}
html[data-theme='light'] .content-card .text-slate-400 {
  color: #334155;
}
html[data-theme='light'] .content-card .bg-slate-900\/40 {
  background: #f8fafc;
  border: 1px solid rgba(15, 23, 42, 0.12);
}
@media (max-width: 640px) {
  .content-card, .hero-card { padding: 1.1rem; border-radius: 1.25rem; }
  .feature-card { padding: 1rem; }
  .list-item { flex-direction: column; align-items: flex-start; }
  .tabbar { bottom: 0.6rem; gap: 0.45rem; padding: 0.55rem; }
  .tabbar-btn { font-size: 0.84rem; padding: 0.78rem 0.35rem; }
}