:root { color-scheme: dark; --bg: #07111d; --text: #f6f8fb; --muted: #b8c7d8; --gold: #f4bd4a; --line: rgba(188, 205, 224, .2); }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font-family: "Segoe UI", system-ui, -apple-system, sans-serif; }
[hidden] { display: none !important; }
a { color: inherit; }
a:focus-visible, button:focus-visible { outline: 3px solid #64c9c4; outline-offset: 5px; }
.pv-site-header__nav a[aria-current="page"] { color: var(--gold); }
main { width: min(1040px, calc(100% - 48px)); margin: 0 auto; padding: 72px 0 48px; }
.eyebrow { margin: 0 0 14px; color: var(--gold); font-size: .75rem; font-weight: 750; letter-spacing: .12em; text-transform: uppercase; }
h1 { margin: 0 0 20px; font-size: clamp(3rem, 7vw, 5.4rem); line-height: 1.05; letter-spacing: -.045em; }
.lead { color: var(--muted); font-size: 1.15rem; line-height: 1.7; margin: 0; }
.tutorial-tabs { display: flex; gap: 6px; width: fit-content; padding: 5px; margin: 38px 0 34px; border: 1px solid var(--line); border-radius: 10px; background: #0b1929; }
.tutorial-tabs button { min-width: 130px; min-height: 46px; padding: 10px 24px; border: 0; border-radius: 6px; background: transparent; color: var(--muted); font: inherit; font-weight: 700; cursor: pointer; }
.tutorial-tabs button:hover { color: var(--text); background: #192a3c; }
.tutorial-tabs button[aria-selected="true"] { color: #221704; background: var(--gold); }
.tutorial-panel { margin-top: 34px; }
.collection-heading { display: flex; align-items: center; justify-content: space-between; gap: 24px; margin-bottom: 24px; }
.collection-heading .eyebrow { margin-bottom: 8px; font-size: .68rem; color: var(--muted); }
h2 { margin: 0; font-size: clamp(1.25rem, 3vw, 1.65rem); letter-spacing: -.02em; }
.text-link { color: var(--gold); text-decoration: none; font-size: .9rem; font-weight: 650; white-space: nowrap; }
.text-link:hover { text-decoration: underline; text-underline-offset: 4px; }
.text-link span { margin-left: 8px; }
.empty-collection { display: grid; justify-items: center; text-align: center; padding: 48px 24px 52px; border: 1px solid var(--line); border-radius: 14px; background: radial-gradient(ellipse at top, #142a40, #0b1827 75%); }
.platform-icon { width: 62px; height: 62px; margin-bottom: 22px; color: #98b5cc; }
.status-label { color: var(--gold); background: rgba(244, 189, 74, .08); border: 1px solid rgba(244, 189, 74, .22); border-radius: 30px; padding: 5px 12px; margin: 0 0 16px; font-size: .72rem; font-weight: 650; }
h3 { margin: 0 0 10px; font-size: clamp(1.1rem, 3vw, 1.4rem); }
.empty-collection > p:last-child { color: var(--muted); line-height: 1.6; margin: 0; }
.help-note { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-top: 28px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.help-note p { margin: 0; font-size: .95rem; color: var(--muted); }
footer { display: flex; justify-content: space-between; gap: 20px; width: min(1040px, calc(100% - 48px)); margin: 0 auto; padding: 0 0 32px; font-size: .78rem; color: var(--muted); }
footer nav { display: flex; gap: 20px; }
footer a { text-decoration: none; }
@media (max-width: 600px) {
  main { padding-top: 42px; }
  .lead { font-size: 1rem; }
  .tutorial-tabs { width: 100%; }
  .tutorial-tabs button { flex: 1; min-width: 0; }
  .collection-heading { align-items: flex-start; flex-direction: column; gap: 14px; }
  .empty-collection { padding: 36px 20px; }
  .help-note, footer { align-items: flex-start; flex-direction: column; gap: 12px; }
}

.tutorial-card { overflow: hidden; border: 1px solid var(--line); border-radius: 14px; background: #0b1827; }
.tutorial-details { padding: 26px 28px 22px; }
.tutorial-details .eyebrow { font-size: .7rem; }
.tutorial-details p:last-child { margin: 0; color: var(--muted); line-height: 1.6; }
.tutorial-card video { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; background: #000; }
.tutorial-card video:focus-visible { outline: 3px solid #64c9c4; outline-offset: -3px; }
.video-fallback { margin: 0; padding: 18px 28px; }