:root {
  color-scheme: light dark;
  --bg: #f4f7fa;
  --paper: #e9f0f5;
  --ink: #14232d;
  --muted: #465d6b;
  --line: #cbd8e1;
  --accent: #075d9a;
  --on-accent: #fff;
  --nav: #f4f7faed;
  --radius: 16px;
  --gutter: clamp(20px, 5vw, 72px);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101921;
    --paper: #172630;
    --ink: #eef5fa;
    --muted: #acbfcd;
    --line: #2d424f;
    --accent: #88ccff;
    --on-accent: #102736;
    --nav: #101921ed;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-padding-top: 85px; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 1rem/1.55 var(--font); -webkit-font-smoothing: antialiased; }
img, video { display: block; max-width: 100%; height: auto; }
figure, h1, h2, h3, p { margin: 0; }
h1, h2, h3 { text-wrap: balance; letter-spacing: -.045em; line-height: 1.06; }
h1 { font-size: clamp(2.8rem, 7vw, 5rem); }
h2 { font-size: clamp(2rem, 5vw, 3.5rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.6rem); }
p { color: var(--muted); }
a { color: var(--accent); text-underline-offset: .2em; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
button { font: inherit; }
[hidden] { display: none !important; }

.skip-link {
  position: fixed; z-index: 5; top: 8px; left: 12px;
  padding: 8px 14px; background: var(--bg); border-radius: 8px; transform: translateY(-150%);
}
.skip-link:focus { transform: none; }
body > nav {
  position: sticky; top: 0; z-index: 3; min-height: 66px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 8px max(var(--gutter), calc((100vw - 1440px) / 2 + var(--gutter)));
  border-bottom: 1px solid var(--line); background: var(--nav);
  -webkit-backdrop-filter: blur(16px); backdrop-filter: blur(16px);
}
.nav-left { display: inline-flex; align-items: center; gap: 9px; color: var(--ink); font-size: 1.17rem; font-weight: 750; letter-spacing: -.04em; text-decoration: none; }
.nav-left img { width: 32px; height: 32px; flex-shrink: 0; }
.nav-links { display: flex; align-items: center; gap: clamp(12px, 2.6vw, 32px); font-size: .9rem; font-weight: 550; }
.nav-links a { color: var(--muted); text-decoration: none; padding-block: 9px; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--ink); text-decoration: underline; }
.nav-links .btn-download { padding: 8px 13px; color: var(--accent); border: 1px solid var(--line); border-radius: 100px; white-space: nowrap; }
.cta-button-large {
  display: inline-flex; align-items: center; gap: 12px; min-height: 48px;
  padding: 11px 19px; border-radius: 100px; background: var(--accent); color: var(--on-accent);
  font-size: .98rem; font-weight: 680; text-decoration: none; white-space: nowrap;
}
.cta-button-large:hover { filter: brightness(.94); }
.text-link { display: inline-block; font-weight: 620; }

.wrap { width: min(1440px, 100%); padding-inline: var(--gutter); margin-inline: auto; }
.hero { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 9fr); gap: clamp(24px, 5vw, 76px); align-items: center; padding-block: clamp(42px, 6.4vw, 90px) 44px; }
.hero-intro h1 { font-size: clamp(2.55rem, 4.55vw, 4.35rem); letter-spacing: -.063em; text-wrap: initial; }
.hero-intro p { max-width: 32ch; margin-block: 20px 25px; font-size: clamp(1.12rem, 1.65vw, 1.32rem); }
.hero-preview { min-width: 0; }
.hero-preview video, .scene img, .scene video, .app-image img {
  width: 100%; border-radius: var(--radius); background: var(--paper);
}
.hero-preview video, .scene img, .scene video { aspect-ratio: 16/9; object-fit: cover; }
.hero-preview video { box-shadow: 0 18px 36px #052d432b; }
.hero-preview figcaption {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  min-height: 52px; color: var(--muted); font-size: .88rem;
}
.hero-preview strong { color: var(--ink); }
#wallpaper-playback {
  padding: 7px 0 7px 10px; min-height: 44px; border: 0; background: none;
  color: var(--accent); font-weight: 640; cursor: pointer;
}
#wallpaper-playback:hover { text-decoration: underline; }

.section-space { padding-block: clamp(36px, 6vw, 86px); }
.section-intro { margin-bottom: clamp(22px, 4vw, 42px); }
.section-intro p, .feature-copy p, .final-section p { max-width: 57ch; margin-top: 13px; font-size: clamp(1.06rem, 1.65vw, 1.22rem); }
.scene-grid, .day-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(18px, 2.6vw, 36px); }
.scene-grid { row-gap: clamp(26px, 4vw, 52px); }
.scene figcaption { padding-top: 12px; }
.scene figcaption p { margin-top: 6px; }
.scene video { background: var(--paper); }
.day-section { border-top: 1px solid var(--line); }
#download-requirements { margin-top: 10px; color: var(--muted); }
.day-grid figcaption { display: flex; align-items: baseline; gap: 8px; }

.app-feature { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); align-items: center; gap: clamp(25px, 5vw, 72px); }
.feature-copy a { margin-top: 18px; }
.app-image img { box-shadow: 0 14px 38px #09131e24; }
.app-image figcaption { padding-top: 10px; color: var(--muted); font-size: .88rem; }
.mac-features {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(18px, 4vw, 52px);
  margin-top: clamp(30px, 6vw, 75px); padding-top: 24px; border-top: 1px solid var(--line);
}
.mac-features p, .mac-features a { margin-top: 10px; }
.final-section {
  display: grid; grid-template-columns: minmax(0, 3fr) minmax(0, 2fr); align-items: start; gap: 24px;
  padding-block: clamp(34px, 6vw, 74px); border-top: 1px solid var(--line);
}
.final-section .text-link { display: block; width: fit-content; margin-top: 11px; }
#availability { scroll-margin-top: 24px; }
footer { padding: 28px var(--gutter) 32px; border-top: 1px solid var(--line); font-size: .9rem; text-align: center; }
footer nav { display: flex; justify-content: center; flex-wrap: wrap; gap: 8px 20px; margin-bottom: 14px; }
footer a { color: var(--muted); }
footer a:hover { color: var(--ink); }

.guide-container { max-width: 900px; margin-inline: auto; padding: clamp(36px, 6vw, 72px) var(--gutter) clamp(56px, 8vw, 100px); }
.breadcrumbs { margin-bottom: 26px; color: var(--muted); font-size: .9rem; }
.breadcrumbs a { color: inherit; }
.guide-article h1 { margin-bottom: 18px; font-size: clamp(2.5rem, 6vw, 4.35rem); }
.guide-article h2 { margin: 40px 0 12px; font-size: clamp(1.6rem, 4vw, 2.25rem); }
.guide-article h3 { margin: 20px 0 8px; }
.guide-article p, .guide-article li { margin-bottom: 12px; font-size: 1.08rem; line-height: 1.65; }
.guide-article ul, .guide-article ol { padding-left: 1.5em; }
.guide-article img { border-radius: var(--radius); }
.guide-article figcaption { margin-top: 8px; color: var(--muted); font-size: .9rem; }
.toc-container { margin-block: 28px; padding: 18px 20px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); }
.toc-container h2 { margin: 0 0 9px; font-size: 1.1rem; letter-spacing: -.02em; }
.toc-container ol { padding: 0; margin: 0; list-style: none; }
.toc-container li { margin: 0; }
.toc-container a { display: inline-block; padding: 4px 0; }
.guide-grid { display: grid; gap: 16px; margin-top: 23px; }
.guide-card { border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); color: var(--ink); text-decoration: none; }
.guide-card:hover h3 { text-decoration: underline; }
.guide-card > div { padding: 18px 20px; }
.guide-article .guide-card h3 { margin: 0 0 7px; }
.guide-article .guide-card p { margin: 0; font-size: .98rem; }
.guide-cta { margin-top: 36px; padding-top: 25px; border-top: 1px solid var(--line); }
.guide-cta h2, .guide-article .guide-cta h2 { margin: 0 0 10px; font-size: clamp(1.6rem, 4vw, 2.2rem); }
.guide-cta p { margin-bottom: 14px; }
.error-page { max-width: 740px; margin-inline: auto; padding: 96px var(--gutter); }
.error-page p { margin-block: 14px 24px; }

@media (max-width: 900px) {
  .hero { grid-template-columns: minmax(0, 4fr) minmax(0, 6fr); gap: 22px; }
  .hero-intro h1 { font-size: clamp(2.55rem, 5.15vw, 4.8rem); }
}
@media (max-width: 700px) {
  .hide-mobile { display: none; }
  .hero, .app-feature { grid-template-columns: minmax(0, 1fr); }
  .hero { gap: 26px; padding-block-end: 22px; }
  .hero-intro h1 { font-size: clamp(2.65rem, 10vw, 4.8rem); }
  .hero-intro p { margin-block: 12px 17px; }
  .mac-features { grid-template-columns: 1fr; }
  .mac-features p, .mac-features a { margin-top: 6px; }
}
@media (max-width: 500px) {
  body > nav { min-height: 58px; gap: 10px; }
  .nav-links { gap: 8px; }
  .nav-links .btn-download { padding-inline: 10px; }
  .home .nav-links a[href="#scenes"] { display: none; }
  .nav-left img { width: 27px; height: 27px; }
  .scene-grid, .final-section { grid-template-columns: 1fr; }
  .day-grid { gap: 10px; }
  .day-grid img { border-radius: 10px; }
  .day-grid figcaption { padding-top: 8px; }
}
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

.performance {
  margin-top: clamp(30px, 5vw, 60px);
  padding: clamp(18px, 3vw, 34px);
  border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper);
}
.metrics { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px clamp(22px, 6vw, 78px); margin-block: 16px; }
.metrics h4 { margin: 0 0 6px; }
.metrics h4 span { color: var(--muted); font-size: .88em; font-weight: 500; }
.metric-rows { margin: 0; font-size: .88rem; }
.metric-rows > div { display: grid; grid-template-columns: 64px minmax(0, 1fr); align-items: center; gap: 6px; padding-block: 4px; }
.metric-rows dt { color: var(--muted); }
.metric-rows dd { display: grid; grid-template-columns: minmax(0, 1fr) 78px; align-items: center; gap: 9px; margin: 0; }
.metric-rows i { display: block; width: var(--size); height: 7px; border-radius: 10px; background: var(--accent); }
.metric-rows strong { font-variant-numeric: tabular-nums; white-space: nowrap; }
.performance figcaption { max-width: 86ch; color: var(--muted); font-size: .84rem; }
@media (max-width: 620px) {
  .metrics { grid-template-columns: minmax(0, 1fr); }
}