/* Shared public cover. Reference: /tutorials. Contract: docs/PAGE-COVERS.md. */
.ct-page-cover-surface {
    --ct-cover-surface: var(--ct-hero-surface, #f1ecf8);
    --ct-cover-glow: var(--ct-hero-glow, #e5d8f1);
    --ct-cover-ink: var(--ct-ink, #242137);
    --ct-cover-muted: var(--ct-muted, #6f607c);
    --ct-cover-accent: var(--ct-accent, #7750b2);
    --ct-cover-line: var(--ct-line, #e2d7ed);
    --ct-cover-ring: var(--ct-line-strong, #b6a1ca);
    --ct-cover-on-accent: var(--ct-on-accent, #fff);
    background: radial-gradient(ellipse at 12% 53%, var(--ct-cover-glow), transparent 54%), var(--ct-cover-surface);
    border-bottom: 1px solid var(--ct-cover-line);
    color: var(--ct-cover-ink);
    overflow: clip;
}
html[data-ct-lesson-theme=dark] .ct-page-cover-surface {
    --ct-cover-surface: var(--ct-hero-surface, #292132);
    --ct-cover-glow: var(--ct-hero-glow, #463158);
    --ct-cover-ink: var(--ct-ink, #eee8f5);
    --ct-cover-muted: var(--ct-muted, #b9abc6);
    --ct-cover-accent: var(--ct-accent, #c09ae5);
    --ct-cover-line: var(--ct-line, #47374f);
    --ct-cover-ring: var(--ct-line-strong, #82658f);
    --ct-cover-on-accent: var(--ct-on-accent, #24162f);
}
.ct-page-cover { font-family: Cairo, Arial, sans-serif; text-align: start; }
.ct-page-cover .ct-page-cover__breadcrumbs { padding-block: 24px 0; }
.ct-page-cover .ct-page-cover__grid { display: grid; grid-template-columns: minmax(0,.94fr) minmax(0,1.06fr); gap: 48px; align-items: center; padding-block: 18px 28px; }
.ct-page-cover .ct-page-cover__story { min-width: 0; }
.ct-page-cover .ct-page-cover__eyebrow { display: flex; gap: 9px; align-items: center; margin: 0 0 14px; color: var(--ct-cover-accent); font-size: 11px; font-weight: 750; line-height: 1.7; }
.ct-page-cover .ct-page-cover__eyebrow > span[aria-hidden] { width: 5px; height: 5px; border-radius: 50%; background: currentColor; flex-shrink: 0; }
.ct-page-cover .ct-page-cover__title { display: table; position: relative; max-width: 100%; color: var(--ct-cover-accent); font-size: clamp(38px,3.5vw,50px); font-weight: 900; letter-spacing: -1.6px; line-height: 1.2; margin: 0 0 22px; overflow-wrap: anywhere; }
.ct-page-cover .ct-page-cover__title svg { width: 93%; height: 8px; position: absolute; bottom: -8px; inset-inline-start: 2%; fill: none; stroke: currentColor; stroke-width: 2.6; opacity: .55; stroke-linecap: round; }
.ct-page-cover .ct-page-cover__subtitle { margin: 0; font-size: clamp(19px,1.8vw,25px); font-weight: 850; line-height: 1.55; letter-spacing: -.4px; color: var(--ct-cover-ink); }
.ct-page-cover .ct-page-cover__description { max-width: 440px; margin-top: 9px; color: var(--ct-cover-muted); font-size: 13px; line-height: 1.9; }
.ct-page-cover .ct-page-cover__description p { margin: 0; }
.ct-page-cover .ct-page-cover__actions { display: flex; align-items: center; flex-wrap: wrap; gap: 24px; margin-top: 18px; }
.ct-page-cover .ct-page-cover__primary,.ct-page-cover .ct-page-cover__secondary { display: inline-flex; align-items: center; gap: 18px; font-weight: 800; text-decoration: none; }
.ct-page-cover .ct-page-cover__primary { min-height: 42px; padding: 9px 18px; border: 1px solid var(--ct-cover-accent); border-radius: 13px; background: var(--ct-cover-accent); color: var(--ct-cover-on-accent); font-size: 12px; }
.ct-page-cover .ct-page-cover__primary:hover { background: var(--ct-accent-hover, #5b378d); border-color: var(--ct-accent-hover, #5b378d); color: var(--ct-cover-on-accent); }
.ct-page-cover .ct-page-cover__secondary { color: var(--ct-cover-accent); font-size: 11px; gap: 10px; }
.ct-page-cover .ct-page-cover__secondary:hover { color: var(--ct-cover-accent); text-decoration: underline; text-underline-offset: 5px; }
.ct-page-cover .ct-page-cover__actions a:focus-visible { outline: 3px solid var(--ct-cover-accent); outline-offset: 5px; }
.ct-page-cover .ct-page-cover__facts { display: flex; flex-wrap: wrap; gap: 15px; color: var(--ct-cover-muted); margin-top: 14px; font-size: 11px; }
.ct-page-cover .ct-page-cover__art { min-width: 0; display: grid; place-items: center; }
.ct-page-cover .ct-page-cover__scene { position: relative; width: min(100%, 340px); aspect-ratio: 1; isolation: isolate; direction: ltr; }
.ct-page-cover .ct-page-cover__orbit { position: absolute; width: calc(100% - 18px); aspect-ratio: 1; top: 50%; left: 50%; border: 1px solid var(--ct-cover-ring); border-radius: 50%; transform: translate(-50%,-50%); opacity: .6; pointer-events: none; }
.ct-page-cover .ct-page-cover__orbit::after { content: ''; position: absolute; width: 7px; height: 7px; left: 50%; top: -4px; border-radius: 50%; background: var(--ct-cover-accent); box-shadow: 0 0 0 4px var(--ct-cover-surface); transform: translateX(-50%); }
.ct-page-cover .ct-page-cover__orbit--inner { width: calc(100% - 72px); border-style: dashed; transform: translate(-50%,-50%) rotate(110deg); }
.ct-page-cover .ct-page-cover__orbit--inner::after { background: #d8ab54; }
.ct-page-cover .ct-page-cover__visual { position: absolute; inset: 10%; display: grid; place-items: center; z-index: 1; }
.ct-page-cover .ct-page-cover__visual img { display: block; max-width: 100%; height: auto; }
.ct-page-cover .ct-page-cover__star { position: absolute; top: 15%; right: 5%; font-size: 22px; line-height: 1; color: var(--ct-cover-accent); }
.ct-page-cover .ct-page-cover__art-label { position: absolute; top: 4%; left: 0; color: var(--ct-cover-muted); font: 8px/1.5 monospace; letter-spacing: 1.8px; }
.ct-page-cover .ct-page-cover__art-label > span { display: inline-block; margin-left: 12px; font-size: 17px; }
[dir=rtl] .ct-page-cover { text-align: right; }
[dir=ltr] .ct-page-cover-surface { background-position: center; }
[dir=ltr] .ct-page-cover .ct-page-cover__primary > span { transform: scaleX(-1); }
/* Tutorials retains its interactive/dynamic hero; only its enclosing surface is shared. */
.ct-tutorial-cover > .ct-catalog-hero { background: transparent; border-bottom: 0; }
.ct-tutorial-cover > .ct-dynamic-identity { background: transparent; }
@media (prefers-reduced-motion: no-preference) {
    .ct-page-cover .ct-page-cover__story { animation: ct-page-cover-enter .6s ease-out both; }
    .ct-page-cover .ct-page-cover__art { animation: ct-page-cover-enter .8s ease-out both; }
    .ct-page-cover .ct-page-cover__visual { animation: ct-page-cover-float 7s ease-in-out infinite; }
    .ct-page-cover .ct-page-cover__orbit--outer { animation: ct-page-cover-orbit 28s linear infinite; }
    .ct-page-cover .ct-page-cover__orbit--inner { animation: ct-page-cover-orbit 36s linear infinite reverse; animation-delay: -11s; }
    .ct-page-cover .ct-page-cover__star { animation: ct-page-cover-float 9s ease-in-out -3s infinite; }
    @keyframes ct-page-cover-enter { from { opacity: 0; translate: 0 10px; } to { opacity: 1; translate: 0 0; } }
    @keyframes ct-page-cover-float { 0%,100% { translate: 0 0; } 50% { translate: 0 -6px; } }
    @keyframes ct-page-cover-orbit { from { transform: translate(-50%,-50%) rotate(0deg); } to { transform: translate(-50%,-50%) rotate(360deg); } }
}
@media (max-width: 1000px) { .ct-page-cover .ct-page-cover__grid { gap: 28px; }.ct-page-cover .ct-page-cover__scene { max-width: 310px; } }
@media (max-width: 760px) {
    .ct-page-cover .ct-page-cover__breadcrumbs { padding-top: 20px; }
    .ct-page-cover .ct-page-cover__grid { grid-template-columns: minmax(0,1fr); gap: 12px; padding-block: 20px 24px; }
    .ct-page-cover .ct-page-cover__title { font-size: 36px; margin-bottom: 20px; }
    .ct-page-cover .ct-page-cover__subtitle { font-size: 22px; line-height: 1.6; }
    .ct-page-cover .ct-page-cover__description { font-size: 12px; line-height: 1.9; }
    .ct-page-cover .ct-page-cover__scene { width: min(100%,260px); }
    .ct-page-cover .ct-page-cover__art-label { top: 6%; font-size: 7px; }
    .ct-page-cover .ct-page-cover__actions { gap: 18px; margin-top: 16px; }
}