:root {
  --bg: #070b14;
  --card: rgba(255,255,255,.045);
  --line: rgba(255,255,255,.09);
  --text: #f4f7fb;
  --muted: #95a3b8;
  --accent: #6d7cff;
  --accent2: #22d3ee;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Arial, sans-serif;
  background:
    radial-gradient(900px 420px at 80% -10%, rgba(109,124,255,.18), transparent 55%),
    radial-gradient(700px 380px at 0% 10%, rgba(34,211,238,.10), transparent 50%),
    var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.55;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
.container { width: min(1120px, 92%); margin: 0 auto; }
header {
  position: sticky; top: 0; z-index: 20;
  background: rgba(7,11,20,.78);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
}
.nav { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: -.4px; font-size: 18px; }
.brand-icon {
  width: 36px; height: 36px; border-radius: 10px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  font-size: 14px;
}
.nav-links { display: flex; gap: 4px; align-items: center; flex-wrap: wrap; }
.nav-links a { color: var(--muted); font-size: 13.5px; font-weight: 650; padding: 8px 11px; border-radius: 9px; }
.nav-links a:hover, .nav-links a.active { color: #fff; background: rgba(109,124,255,.14); }
.nav-cta { background: linear-gradient(135deg, var(--accent), #0891b2) !important; color: #fff !important; }
main { padding: 42px 0 72px; }
.hero { max-width: 780px; margin: 0 auto 22px; text-align: center; }
.eyebrow {
  display: inline-block; margin-bottom: 12px; padding: 6px 11px; border-radius: 999px;
  border: 1px solid rgba(109,124,255,.28); color: #c7ceff; font-size: 12px; font-weight: 700;
  background: rgba(109,124,255,.1);
}
h1 { font-size: clamp(32px, 5vw, 52px); line-height: 1.08; letter-spacing: -1.4px; margin-bottom: 12px; }
.lede { color: var(--muted); font-size: 17px; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 18px;
  box-shadow: 0 20px 50px rgba(0,0,0,.25);
}
.input-row { display: flex; gap: 10px; }
input[type="url"], input[type="text"], input[type="email"], textarea {
  width: 100%; min-width: 0; border: 1px solid rgba(255,255,255,.12); background: rgba(7,11,20,.7);
  color: #fff; border-radius: 12px; padding: 14px 16px; font-size: 16px; outline: none;
}
textarea { min-height: 120px; resize: vertical; }
input:focus, textarea:focus { border-color: var(--accent); }
button, .btn {
  border: 0; border-radius: 12px; padding: 14px 18px; font-weight: 800; color: #fff; cursor: pointer;
  background: linear-gradient(135deg, var(--accent), #0891b2); white-space: nowrap;
}
button:disabled { opacity: .65; cursor: wait; }
.message { display: none; margin-top: 14px; padding: 12px 14px; border-radius: 10px; font-size: 14px; }
.message.show { display: block; }
.message.error { background: rgba(239,68,68,.12); color: #fecaca; }
.message.info { background: rgba(109,124,255,.12); color: #dbe1ff; }
.message.success { background: rgba(16,185,129,.12); color: #a7f3d0; }
.result { display: none; margin-top: 18px; }
.result.show { display: block; }
.preview { display: flex; gap: 14px; margin-bottom: 14px; }
.thumbnail { width: 200px; height: 118px; object-fit: cover; border-radius: 12px; background: #111827; }
.title { font-size: 18px; margin-bottom: 6px; }
.meta { color: var(--muted); font-size: 14px; }
.links { display: flex; flex-direction: column; gap: 10px; margin-top: 10px; }
.download-link {
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
  border: 1px solid var(--line); border-radius: 12px; padding: 10px 12px; background: rgba(255,255,255,.03);
}
.quality { font-weight: 800; }
.format { color: var(--muted); font-size: 13px; }
.section { margin-top: 48px; }
.section h2 { font-size: 28px; letter-spacing: -.5px; margin-bottom: 8px; }
.section .sub { color: var(--muted); margin-bottom: 16px; }
.grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.tile, .feature, .step, .faq, .prose-card {
  background: var(--card); border: 1px solid var(--line); border-radius: 15px; padding: 18px;
}
.tile { text-align: center; font-weight: 750; }
.tile a { display: block; }
.feature h3, .step h3, .faq h3 { font-size: 16px; margin-bottom: 6px; }
.feature p, .step p, .faq p, .prose p, .prose li { color: var(--muted); font-size: 14.5px; }
.prose { max-width: 820px; }
.prose h1 { margin-bottom: 10px; }
.prose h2 { font-size: 22px; margin: 22px 0 8px; }
.prose p, .prose li { margin-bottom: 10px; }
.prose ul { padding-left: 18px; }
.platforms a { display: block; }
footer { border-top: 1px solid var(--line); padding: 28px 0 40px; color: #7d8ba0; font-size: 13px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 10px; }
.note { margin-top: 10px; color: var(--muted); font-size: 12.5px; }
@media (max-width: 900px) {
  .grid, .grid-3 { grid-template-columns: 1fr 1fr; }
  .nav { flex-wrap: wrap; padding: 12px 0; }
}
@media (max-width: 640px) {
  .input-row, .preview, .download-link { flex-direction: column; align-items: stretch; }
  .thumbnail { width: 100%; height: auto; max-height: 220px; }
  .grid, .grid-3 { grid-template-columns: 1fr; }
}