/* BitColossus — "Warm Atelier Tech" design system (bitcolossus-template/warm_atelier_tech/DESIGN.md).
   System fonts only; no framework. Tokens first, then layout, components and pages. */

:root {
  --bg: #faf9f6;
  --surface: #ffffff;
  --surface-low: #f4f3f1;
  --surface-mid: #efeeeb;
  --surface-high: #e9e8e5;
  --sand: #f4f1ea;
  --ink: #1e2a38;
  --ink-soft: #59413c;
  --muted: #535f6f;
  --faint: #8d716b;
  --line: #efece6;
  --line-strong: #e2ded5;
  --primary: #a93017;
  --primary-hover: #cb482c;
  --coral: #e85d3f;
  --coral-tint: #ffdad3;
  --amber: #efa94a;
  --amber-ink: #815200;
  --amber-tint: #ffddb7;
  --blue-tint: #d4e1f4;
  --blue-ink: #3c4857;
  --green: #1f7a4d;
  --slate: #1e2a38;
  --radius-sm: 6px;
  --radius: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-1: 0 2px 8px -2px rgba(30, 42, 56, .06), 0 1px 3px 0 rgba(232, 93, 63, .04);
  --shadow-2: 0 12px 24px -6px rgba(30, 42, 56, .1), 0 4px 8px -2px rgba(232, 93, 63, .05);
  --shadow-3: 0 24px 48px -12px rgba(30, 42, 56, .18);
  --font-sans: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-serif: ui-serif, "New York", "Iowan Old Style", Georgia, "Songti SC", serif;
  --font-mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --gutter: 20px;
  color-scheme: light;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 88px; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 400 15px/1.6 var(--font-sans); -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; overflow-x: hidden; }
img, svg { display: block; max-width: 100%; }
img { height: auto; }
a { color: var(--primary); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--primary-hover); }
h1, h2, h3, h4 { margin: 0; color: var(--ink); font-weight: 700; letter-spacing: -.015em; line-height: 1.2; text-wrap: balance; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; }
code, kbd { font-family: var(--font-mono); font-size: .88em; }
button { font: inherit; }
[hidden] { display: none !important; }
:focus-visible { outline: 2px solid var(--coral); outline-offset: 2px; border-radius: 4px; box-shadow: 0 0 0 5px rgba(232, 93, 63, .15); }
main:focus, section:focus { outline: none; }

.skip-link { position: absolute; left: 12px; top: -48px; z-index: 100; padding: 10px 14px; border-radius: var(--radius); background: var(--ink); color: #fff; font-weight: 600; text-decoration: none; }
.skip-link:focus { top: 12px; color: #fff; }

.container { width: 100%; max-width: 1280px; margin-inline: auto; padding-inline: var(--gutter); }
.container-narrow { width: 100%; max-width: 760px; margin-inline: auto; padding-inline: var(--gutter); }
.section { padding-block: 40px; }
.icon { flex: none; }

/* ---------- type helpers ---------- */
.eyebrow { display: inline-flex; align-items: center; gap: 6px; margin-bottom: 10px; color: var(--primary); font: 500 12px/16px var(--font-mono); letter-spacing: .06em; text-transform: uppercase; }
.eyebrow-chip { padding: 4px 10px; border-radius: 6px; background: var(--blue-tint); color: var(--blue-ink); }
.eyebrow-badge { display: inline-flex; align-items: center; gap: 8px; margin-bottom: 22px; padding: 6px 12px; border-radius: 999px; background: var(--surface-mid); box-shadow: var(--shadow-1); color: var(--ink-soft); font: 500 12px/16px var(--font-mono); letter-spacing: .06em; text-transform: uppercase; }
.pulse { width: 8px; height: 8px; border-radius: 50%; background: var(--primary); animation: pulse 2.4s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: .35; } }
.display { font-size: clamp(36px, 6vw, 60px); line-height: 1.1; letter-spacing: -.03em; }
.display em, .display-accent { color: var(--primary); font-family: var(--font-serif); font-style: italic; font-weight: 700; letter-spacing: -.01em; }
:lang(zh) .display em { font-family: var(--font-sans); font-style: normal; }
:lang(zh) :is(h1, h2, h3, .hero-sub) { word-break: keep-all; overflow-wrap: anywhere; }
.display-sm { font-size: clamp(32px, 5vw, 48px); line-height: 1.12; letter-spacing: -.025em; }
.lead { color: var(--ink-soft); font-size: 18px; line-height: 1.65; }
.text-link { display: inline-flex; align-items: center; gap: 6px; font-weight: 600; text-decoration: none; }
.text-link:hover .icon { transform: translateX(2px); }
.text-link .icon { transition: transform .2s; }

/* ---------- buttons, badges, chips ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 42px; padding: 10px 16px; border: 1px solid transparent; border-radius: var(--radius); font: 600 14px/20px var(--font-sans); letter-spacing: .01em; text-decoration: none; white-space: nowrap; cursor: pointer; transition: background-color .2s, border-color .2s, box-shadow .2s, transform .2s; }
.btn-lg { min-height: 50px; padding: 13px 22px; font-size: 15px; }
.btn-primary { background: var(--primary); border-top-color: rgba(255, 255, 255, .2); color: #fff; box-shadow: var(--shadow-1); }
.btn-primary:hover { background: var(--primary-hover); color: #fff; box-shadow: 0 8px 20px -6px rgba(203, 72, 44, .45); }
.btn-secondary { background: var(--surface); border-color: var(--line-strong); color: var(--ink); }
.btn-secondary:hover { border-color: var(--coral); background: #fdfcfa; color: var(--ink); }
.btn.is-disabled { background: var(--surface-high); border-color: var(--line-strong); color: var(--muted); box-shadow: none; cursor: not-allowed; }
.mini-button { padding: 2px 8px; border: 1px solid var(--line-strong); border-radius: 6px; background: var(--surface); color: var(--ink); font: 500 12px/18px var(--font-sans); cursor: pointer; }
.mini-button:hover { border-color: var(--amber); background: #fff8ee; }
.badge { display: inline-flex; align-items: center; height: 24px; padding: 0 10px; border-radius: 999px; font: 500 12px/1 var(--font-mono); letter-spacing: .02em; white-space: nowrap; }
.badge-free { background: #e2f3e8; color: var(--green); }
.badge-price { background: var(--coral-tint); color: #8b1a02; }
.badge-soon { background: rgba(239, 169, 74, .16); color: var(--amber-ink); }
.badge-version { background: var(--surface-high); color: var(--ink-soft); }
.chip, .chips li { display: inline-flex; align-items: center; height: 24px; padding: 0 8px; border: 1px solid #e5e0d8; border-radius: 6px; background: #f3efea; color: #374151; font: 500 11.5px/1 var(--font-mono); white-space: nowrap; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; }
.tags li { padding: 3px 9px; border-radius: 999px; background: var(--blue-tint); color: var(--blue-ink); font: 500 11.5px/16px var(--font-mono); }
.count-pill { padding: 3px 10px; border-radius: 999px; background: var(--blue-tint); color: var(--blue-ink); font: 500 12px/16px var(--font-mono); }

/* ---------- header ---------- */
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(250, 249, 246, .86); box-shadow: 0 1px 8px rgba(0, 0, 0, .04); -webkit-backdrop-filter: saturate(1.4) blur(16px); backdrop-filter: saturate(1.4) blur(16px); }
.header-inner { display: flex; align-items: center; gap: 12px; height: 64px; }
.brand { display: inline-flex; flex: none; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; }
.brand:hover { color: var(--ink); }
.brand-text { display: flex; flex-direction: column; line-height: 1; }
.brand-name { font-size: 19px; font-weight: 800; letter-spacing: -.03em; }
.brand-dot { color: var(--coral); }
.brand-tag { margin-top: 4px; color: #64748b; font-size: 9.5px; font-weight: 600; letter-spacing: .14em; text-transform: uppercase; }
.site-nav { display: flex; gap: 4px; margin-left: auto; padding: 4px; border-radius: var(--radius-md); background: rgba(244, 243, 241, .7); }
.site-nav a { white-space: nowrap; padding: 6px 12px; border-radius: var(--radius); color: var(--ink-soft); font-size: 14px; font-weight: 600; text-decoration: none; transition: background-color .2s, color .2s; }
.site-nav a:hover { background: var(--surface-high); color: var(--ink); }
.site-nav a[aria-current="page"] { background: var(--surface); color: var(--primary); box-shadow: 0 1px 3px rgba(0, 0, 0, .05); }
.header-tools { display: flex; align-items: center; gap: 4px; }
.lang-switch, .icon-button { white-space: nowrap; display: inline-flex; align-items: center; justify-content: center; gap: 5px; height: 34px; min-width: 34px; padding: 0 8px; border-radius: var(--radius); color: var(--ink-soft); font-size: 13px; font-weight: 600; text-decoration: none; }
.lang-switch:hover, .icon-button:hover { background: var(--surface-mid); color: var(--ink); }

/* ---------- home hero ---------- */
.hero, .app-hero, .page-hero { position: relative; overflow: hidden; background: var(--surface-low); }
.hero::before, .hero::after, .app-hero::before, .app-hero::after, .page-hero::before, .page-hero::after { content: ""; position: absolute; border-radius: 50%; filter: blur(64px); pointer-events: none; }
.hero::before, .app-hero::before, .page-hero::before { top: -140px; left: -140px; width: 420px; height: 420px; background: rgba(255, 218, 211, .6); }
.hero::after, .app-hero::after, .page-hero::after { right: -80px; bottom: -120px; width: 360px; height: 360px; background: rgba(212, 225, 244, .7); }
.hero-inner { position: relative; z-index: 1; display: flex; flex-direction: column; align-items: center; padding-block: 64px 88px; text-align: center; }
.hero-sub { max-width: 760px; margin-top: 16px; color: var(--ink-soft); font-size: clamp(20px, 2.6vw, 27px); font-weight: 500; line-height: 1.35; letter-spacing: -.01em; }
.hero-body { max-width: 680px; margin-top: 18px; color: var(--muted); font-size: 17px; line-height: 1.7; }
.value-badges { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-top: 30px; list-style: none; }
.value-badges li { display: inline-flex; align-items: center; gap: 8px; padding: 7px 13px; border-radius: var(--radius); background: var(--bg); box-shadow: var(--shadow-1); font: 500 12.5px/16px var(--font-mono); }
.value-badges li:nth-child(4n+1) .icon, .value-badges li:nth-child(4n+4) .icon { color: var(--primary); }
.value-badges li:nth-child(4n+2) .icon { color: var(--amber-ink); }
.value-badges li:nth-child(4n+3) .icon { color: var(--muted); }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; width: 100%; max-width: 760px; margin: 44px 0 0; padding: 22px; border-radius: var(--radius-lg); background: rgba(239, 238, 235, .7); box-shadow: var(--shadow-1); }
.stats div { display: flex; flex-direction: column-reverse; align-items: center; gap: 2px; }
.stats dd { margin: 0; font-size: 38px; font-weight: 700; line-height: 1.15; letter-spacing: -.02em; }
.stats dt { color: var(--muted); font-size: 13px; }
.stats .stat-accent dd { color: var(--primary); }
.stats .stat-amber dd { color: var(--amber-ink); }

/* ---------- catalog ---------- */
.catalog { position: relative; z-index: 2; margin-top: -30px; padding-bottom: 32px; }
.toolbar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 14px; margin-bottom: 28px; padding: 14px 16px; border-radius: var(--radius-lg); background: var(--surface); box-shadow: var(--shadow-2); }
.toolbar-title { display: flex; align-items: center; gap: 12px; }
.toolbar-title h2 { font-size: 20px; letter-spacing: -.01em; }
.filters { display: flex; gap: 6px; overflow-x: auto; }
.pill { display: inline-flex; align-items: center; gap: 6px; padding: 8px 14px; border: 0; border-radius: var(--radius); background: var(--surface-low); color: var(--ink-soft); font-size: 14px; font-weight: 600; white-space: nowrap; cursor: pointer; transition: background-color .2s, color .2s; }
.pill:hover { background: var(--surface-mid); color: var(--ink); }
.pill.is-active { background: var(--primary); color: #fff; box-shadow: var(--shadow-1); }
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 330px), 1fr)); gap: 24px; }
.empty-note { padding: 48px 0; color: var(--muted); text-align: center; }
.next-card { display: flex; flex-direction: column; align-items: flex-start; justify-content: center; gap: 12px; padding: 28px; border: 1.5px dashed var(--line-strong); border-radius: var(--radius-lg); background: transparent; }
.next-card h3 { font-size: 19px; }
.next-card p { color: var(--muted); }
.next-icon { display: grid; place-items: center; width: 56px; height: 56px; border-radius: 14px; background: var(--amber-tint); color: var(--amber-ink); }

.app-card { position: relative; display: flex; flex-direction: column; padding: 24px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--surface); box-shadow: var(--shadow-1); transition: box-shadow .3s, transform .3s; }
.app-card:hover { box-shadow: var(--shadow-2); transform: translateY(-2px); }
.card-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; margin-bottom: 16px; }
.card-badges { display: flex; flex-direction: column; align-items: flex-end; gap: 6px; }
.card-title { font-size: 21px; letter-spacing: -.01em; }
.card-title a { color: inherit; text-decoration: none; }
.card-title a::after { content: ""; position: absolute; inset: 0; border-radius: inherit; }
.app-card:hover .card-title a { color: var(--primary); }
.card-tagline { margin-top: 3px; color: var(--muted); font-size: 13.5px; }
.card-summary { margin-top: 12px; color: var(--ink-soft); line-height: 1.6; }
.card-features { display: grid; gap: 8px; margin-top: 18px; padding: 12px; border-radius: var(--radius); background: var(--surface-low); list-style: none; }
.card-features li { display: flex; align-items: flex-start; gap: 8px; font-size: 13.5px; line-height: 1.45; }
.card-features .icon { margin-top: 1px; color: var(--primary); }
.card-footer { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px; margin-top: auto; padding-top: 20px; }
.card-category { color: var(--muted); font: 500 12px/16px var(--font-mono); }
.card-actions { position: relative; z-index: 1; display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 14px; }
.card-actions .btn { width: 100%; }

.app-icon { display: inline-flex; flex: none; align-items: center; justify-content: center; width: 56px; height: 56px; border-radius: 14px; overflow: hidden; box-shadow: var(--shadow-1); transition: transform .3s; }
.app-icon-lg { width: 84px; height: 84px; border-radius: 20px; box-shadow: var(--shadow-2); }
.app-icon-img { width: 100%; height: 100%; object-fit: cover; }
.app-card:hover .app-icon { transform: scale(1.04); }

/* ---------- mosaic / principles ---------- */
.mosaic { display: grid; gap: 36px; align-items: center; padding: 32px; border: 1px solid var(--line); border-radius: var(--radius-xl); background: var(--surface); box-shadow: var(--shadow-1); }
.mosaic h2, .section-head h2, .split h2, .note-card h2, .specs-card h2, .faq h2, .cta-band h2 { font-size: clamp(28px, 3.4vw, 40px); line-height: 1.18; letter-spacing: -.02em; }
.mosaic-body { margin-top: 16px; color: var(--muted); font-size: 17px; line-height: 1.7; }
.principles { display: flex; flex-wrap: wrap; gap: 20px 28px; margin-top: 24px; list-style: none; }
.principles li { display: flex; align-items: center; gap: 12px; }
.principles li > span:last-child { display: flex; flex-direction: column; }
.principles strong { font-size: 15.5px; }
.principles li > span:last-child > span { color: var(--muted); font-size: 13px; }
.principle-icon { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 50%; background: var(--coral-tint); color: var(--primary); }
.principles li:nth-child(2) .principle-icon { background: var(--blue-tint); color: var(--blue-ink); }
.mosaic-visual { position: relative; }
.showcase { position: relative; display: grid; place-items: center; min-height: 340px; padding: 28px; border-radius: var(--radius-lg); background: linear-gradient(145deg, #2a3748, #1e2a38 60%, #2d2a33); overflow: hidden; }
.showcase::before { content: ""; position: absolute; inset: auto -60px -80px auto; width: 260px; height: 260px; border-radius: 50%; background: rgba(232, 93, 63, .35); filter: blur(60px); }
.showcase .shot-compact { position: relative; z-index: 1; width: min(78%, 340px); margin: 0; }
.showcase .shot-compact img { border-radius: 14px; box-shadow: var(--shadow-3); }
.showcase .menu-mock-compact { position: absolute; z-index: 2; right: 18px; bottom: 18px; width: min(56%, 250px); margin: 0; }
.showcase-caption { margin-top: 12px; color: var(--muted); font: 500 12px/16px var(--font-mono); text-align: center; }

/* ---------- sections ---------- */
.section-head { max-width: 720px; margin-bottom: 28px; }
.section-head p:not(.eyebrow) { margin-top: 12px; color: var(--muted); font-size: 17px; line-height: 1.65; }
.section-row { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 8px 24px; }
.section-row .section-head { margin-bottom: 28px; }
.section-row .text-link { margin-bottom: 32px; }
.post-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr)); gap: 24px; }
.post-card { position: relative; display: flex; flex-direction: column; gap: 10px; padding: 24px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--surface); box-shadow: var(--shadow-1); transition: box-shadow .3s, transform .3s; }
.post-card:hover { box-shadow: var(--shadow-2); transform: translateY(-2px); }
.post-card-title { font-size: 20px; line-height: 1.3; letter-spacing: -.01em; }
.post-card-title a { color: inherit; text-decoration: none; }
.post-card-title a::after { content: ""; position: absolute; inset: 0; border-radius: inherit; }
.post-card:hover .post-card-title a { color: var(--primary); }
.post-card-summary { color: var(--ink-soft); }
.post-card .tags { margin-top: auto; padding-top: 6px; }
.post-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; color: var(--muted); font: 500 12.5px/18px var(--font-mono); }

.cta-band { position: relative; display: grid; gap: 24px; align-items: center; padding: 32px; border-radius: var(--radius-xl); background: var(--surface-mid); overflow: hidden; }
.cta-band::after { content: ""; position: absolute; right: -80px; bottom: -80px; width: 320px; height: 320px; border-radius: 50%; background: rgba(255, 218, 211, .5); filter: blur(40px); pointer-events: none; }
.cta-copy, .cta-actions { position: relative; z-index: 1; }
.cta-copy p:not(.eyebrow) { max-width: 560px; margin-top: 10px; color: var(--muted); font-size: 16px; }
.eyebrow-accent { color: var(--primary); }
.cta-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.cta-app .cta-copy { display: grid; grid-template-columns: auto 1fr; align-items: center; gap: 4px 16px; }
.cta-app .cta-copy .app-icon { grid-row: span 2; }
.cta-app .cta-copy p { margin-top: 0; }

/* ---------- app page ---------- */
.crumbs { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 20px; padding-block: 14px; font-size: 13.5px; }
.crumbs ol { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; list-style: none; }
.crumbs li { display: inline-flex; align-items: center; gap: 6px; color: var(--muted); }
.crumbs li + li::before { content: "/"; color: var(--line-strong); }
.crumbs a { display: inline-flex; align-items: center; gap: 6px; color: var(--muted); text-decoration: none; }
.crumbs a:hover { color: var(--primary); }
.crumbs [aria-current] { color: var(--ink); font-weight: 600; }
.crumb-meta { display: inline-flex; align-items: center; gap: 8px; color: var(--muted); font: 500 12px/16px var(--font-mono); }
.dot { width: 7px; height: 7px; border-radius: 50%; background: #34a26b; }
.crumbs-plain { justify-content: flex-start; padding-block: 0 18px; }

.app-hero-grid { position: relative; z-index: 1; display: grid; gap: 40px; align-items: center; padding-block: 48px 64px; }
.app-id { display: flex; align-items: center; gap: 20px; margin-bottom: 22px; }
.app-id h1 { font-size: clamp(36px, 5vw, 52px); letter-spacing: -.03em; line-height: 1.05; }
.app-tagline { margin-top: 6px; color: var(--ink-soft); font-size: 17px; font-weight: 500; }
.pill-row { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.cta-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.integrity { display: flex; flex-wrap: wrap; gap: 8px 22px; margin-top: 20px; list-style: none; color: var(--muted); font-size: 13px; }
.integrity li { display: inline-flex; align-items: center; gap: 7px; }
.integrity code { color: var(--ink); }
.notice { display: flex; gap: 10px; max-width: 620px; margin-top: 18px; padding: 12px 14px; border: 1px solid rgba(239, 169, 74, .35); border-radius: var(--radius); background: rgba(239, 169, 74, .1); color: var(--amber-ink); font-size: 13.5px; line-height: 1.55; }
.notice .icon { margin-top: 1px; }
.app-hero-visual { display: flex; justify-content: center; }
.shot { margin: 0; }
.shot img { border-radius: var(--radius-lg); box-shadow: var(--shadow-3); }
.app-hero-visual .shot { width: min(100%, 440px); }

.menu-mock { width: min(100%, 440px); margin: 0; }
.mock-screen { position: relative; aspect-ratio: 11 / 8; border-radius: var(--radius-lg); background: linear-gradient(160deg, #ffd9b0 0%, #f6a07e 38%, #6e7fa8 100%); box-shadow: var(--shadow-3); overflow: hidden; }
.menu-mock-compact .mock-screen { aspect-ratio: 5 / 4; background: linear-gradient(160deg, #ffe2c2, #f3a582 55%, #8a8fb0); }
.mock-menubar { display: flex; align-items: center; justify-content: flex-end; gap: 14px; height: 28px; padding: 0 14px; background: rgba(255, 255, 255, .45); color: #1e2a38; font: 600 12.5px/1 var(--font-sans); -webkit-backdrop-filter: blur(20px); backdrop-filter: blur(20px); }
.mock-dots { width: 42px; height: 6px; margin-right: auto; border-radius: 3px; background: rgba(30, 42, 56, .25); }
.mock-status { display: grid; place-items: center; width: 26px; height: 22px; border-radius: 5px; }
.mock-status.is-active { background: rgba(30, 42, 56, .14); }
.mock-menu { position: absolute; top: 34px; right: 46px; min-width: 210px; padding: 5px; border: 1px solid rgba(255, 255, 255, .55); border-radius: 10px; background: rgba(246, 245, 243, .86); box-shadow: 0 18px 40px -10px rgba(30, 42, 56, .45); color: #1e2a38; font-size: 13.5px; -webkit-backdrop-filter: blur(24px); backdrop-filter: blur(24px); }
.menu-mock-compact .mock-menu { right: 26px; min-width: 176px; font-size: 12px; }
.mock-item { display: grid; grid-template-columns: 18px 1fr auto; align-items: center; padding: 4px 8px; border-radius: 5px; }
.mock-item:first-child { background: #3b82f6; color: #fff; }
.mock-item kbd { color: inherit; opacity: .6; font-family: var(--font-sans); }
.mock-check { font-size: 12px; font-weight: 700; }
.mock-sep { height: 1px; margin: 5px 8px; background: rgba(30, 42, 56, .14); }
.mock-legend { display: flex; justify-content: center; gap: 22px; margin-top: 16px; color: var(--muted); font-size: 13px; }
.mock-legend span { display: inline-flex; align-items: center; gap: 7px; }

.metrics { position: relative; z-index: 2; margin-top: -28px; }
.metrics dl { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; margin: 0; border-radius: var(--radius-lg); background: var(--line); box-shadow: var(--shadow-2); overflow: hidden; }
.metrics div { display: flex; flex-direction: column-reverse; justify-content: flex-end; gap: 4px; padding: 20px; background: var(--surface); text-align: center; }
.metrics dd { margin: 0; font-size: 30px; font-weight: 700; line-height: 1.15; letter-spacing: -.02em; }
.metrics div:nth-child(1) dd { color: var(--primary); }
.metrics div:nth-child(3) dd { color: var(--amber-ink); }
.metrics dt { color: var(--muted); font-size: 13px; }

.feature-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr)); gap: 20px; }
.feature-card { padding: 24px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--surface); box-shadow: var(--shadow-1); }
.feature-card h3 { margin-top: 16px; font-size: 18px; letter-spacing: -.01em; }
.feature-card p { margin-top: 8px; color: var(--ink-soft); }
.feature-icon { display: grid; place-items: center; width: 44px; height: 44px; border-radius: var(--radius-md); background: var(--coral-tint); color: var(--primary); }
.feature-card:nth-child(3n+2) .feature-icon { background: var(--amber-tint); color: var(--amber-ink); }
.feature-card:nth-child(3n) .feature-icon { background: var(--blue-tint); color: var(--blue-ink); }

.compare { display: grid; gap: 20px; }
.compare-col { padding: 24px; border-radius: var(--radius-lg); background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow-1); }
.compare-col h3 { font-size: 17px; }
.compare-col ul { display: grid; gap: 12px; margin-top: 16px; list-style: none; }
.compare-col li { display: flex; gap: 10px; color: var(--ink-soft); }
.compare-col .icon { margin-top: 2px; }
.compare-yes .icon { color: var(--green); }
.compare-no { background: var(--surface-low); }
.compare-no .icon { color: var(--faint); }

.note-card { padding: 32px; border-radius: var(--radius-xl); background: var(--slate); color: #e7e9ee; }
.note-card h2 { color: #fff; }
.note-card .eyebrow { color: var(--amber); }
.note-card p:not(.eyebrow) { max-width: 820px; margin-top: 14px; font-size: 16.5px; line-height: 1.7; }
.note-card code { padding: 2px 6px; border-radius: 5px; background: rgba(255, 255, 255, .1); color: #ffd9a8; }
.note-card strong { color: #fff; }
.note-card .text-link { margin-top: 18px; color: #ffb4a4; }

.split { display: grid; gap: 32px; align-items: center; }
.split-copy p:not(.eyebrow) { margin-top: 14px; color: var(--ink-soft); font-size: 17px; line-height: 1.7; }
.split-copy .text-link { margin-top: 18px; }
.split-visual { margin: 0; padding: 24px; border-radius: var(--radius-xl); background: var(--surface-low); }
.split-visual img { width: auto; max-height: 640px; margin-inline: auto; border-radius: var(--radius-md); box-shadow: var(--shadow-2); }

.specs-faq { display: grid; gap: 32px; align-items: start; }
.specs-card h2 { font-size: clamp(26px, 2.6vw, 32px); }
.specs-card { padding: 28px; border: 1px solid var(--line); border-radius: var(--radius-xl); background: var(--surface); box-shadow: var(--shadow-1); }
.spec-list { margin: 20px 0 0; }
.spec-list div { display: grid; grid-template-columns: minmax(110px, 38%) 1fr; gap: 16px; padding: 12px 0; border-top: 1px solid var(--line); }
.spec-list dt { color: var(--muted); font-size: 14px; }
.spec-list dd { margin: 0; font-weight: 500; overflow-wrap: anywhere; }
.hash { font-size: 12px; line-height: 1.5; }
.faq details { border-bottom: 1px solid var(--line-strong); }
.faq details:first-of-type { margin-top: 12px; }
.faq summary { display: flex; justify-content: space-between; gap: 16px; padding: 16px 0; font-size: 16px; font-weight: 600; cursor: pointer; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; flex: none; color: var(--primary); font: 400 22px/1 var(--font-sans); transition: transform .2s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { padding-bottom: 18px; color: var(--ink-soft); }
.disclaimer { padding-bottom: 32px; color: var(--muted); font-size: 12.5px; text-align: center; }

/* ---------- blog & prose ---------- */
.page-hero-inner { position: relative; z-index: 1; display: flex; flex-direction: column; align-items: center; gap: 16px; padding-block: 56px 64px; text-align: center; }
.page-hero-inner .eyebrow-badge { margin-bottom: 0; }
.page-lead { max-width: 640px; color: var(--muted); font-size: 18px; line-height: 1.65; }
.page-hero-compact .container-narrow { position: relative; z-index: 1; display: grid; gap: 12px; padding-block: 48px; }
.post-grid-index .post-card-title { font-size: 22px; }

.post-header { padding-top: 32px; }
.post-header h1 { margin-top: 14px; font-size: clamp(32px, 5vw, 46px); line-height: 1.14; letter-spacing: -.025em; }
.post-lead { margin-top: 16px; color: var(--ink-soft); font-size: 19px; line-height: 1.6; }
.post-header .post-meta { margin-top: 18px; padding-bottom: 24px; border-bottom: 1px solid var(--line-strong); }
.toc { margin-top: 24px; }
.toc-title { margin-bottom: 8px; color: var(--muted); font: 500 12px/16px var(--font-mono); letter-spacing: .06em; text-transform: uppercase; }
.toc ol { display: grid; gap: 4px; padding: 16px 20px 16px 36px; border-radius: var(--radius-md); background: var(--surface-low); }
.toc a { color: var(--ink-soft); text-decoration: none; }
.toc a:hover { color: var(--primary); text-decoration: underline; }

.prose { padding-block: 28px 16px; font-size: 17px; line-height: 1.75; }
.prose > * + * { margin-top: 1.1em; }
.prose h2 { margin-top: 1.9em; font-size: 27px; line-height: 1.25; letter-spacing: -.02em; }
.prose h3 { margin-top: 1.6em; font-size: 21px; }
.prose h4 { margin-top: 1.4em; font-size: 18px; }
.prose ul, .prose ol { padding-left: 1.4em; }
.prose li + li { margin-top: .4em; }
.prose li::marker { color: var(--coral); }
.prose code { padding: 2px 6px; border-radius: 5px; background: var(--surface-mid); color: #7a2412; }
.prose blockquote { margin-inline: 0; padding: 14px 18px; border-left: 3px solid var(--amber); border-radius: 0 var(--radius) var(--radius) 0; background: rgba(239, 169, 74, .09); color: var(--ink-soft); }
.prose blockquote > * + * { margin-top: .6em; }
.prose hr { height: 1px; border: 0; background: var(--line-strong); }
.prose figure { margin-inline: 0; }
.prose figure img { margin-inline: auto; border-radius: var(--radius-md); box-shadow: var(--shadow-2); }
.prose figcaption { margin-top: 10px; color: var(--muted); font-size: 14px; text-align: center; }
.code-block { position: relative; }
.code-block pre { margin: 0; padding: 18px 20px; border-radius: var(--radius); background: var(--slate); color: #faf9f6; font-size: 13.5px; line-height: 1.65; overflow-x: auto; }
.code-block pre code { padding: 0; background: none; color: inherit; font-size: inherit; }
.code-block .copy { position: absolute; top: 8px; right: 8px; padding: 3px 9px; border: 1px solid rgba(255, 255, 255, .18); border-radius: 6px; background: rgba(255, 255, 255, .08); color: #faf9f6; font: 500 12px/18px var(--font-sans); cursor: pointer; }
.code-block .copy:hover { border-color: var(--amber); color: #ffd9a8; }
.table-wrap { overflow-x: auto; border: 1px solid var(--line-strong); border-radius: var(--radius); }
.prose table { width: 100%; border-collapse: collapse; font-size: 15px; line-height: 1.5; }
.prose th, .prose td { padding: 10px 14px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.prose th { background: var(--surface-low); font-weight: 600; }
.prose tr:last-child td { border-bottom: 0; }

.post-apps { display: grid; gap: 16px; padding-block: 24px 16px; }
.post-app { display: grid; grid-template-columns: auto 1fr; gap: 16px; padding: 22px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--surface); box-shadow: var(--shadow-1); }
.post-app .eyebrow { margin-bottom: 4px; }
.post-app h2 { font-size: 20px; }
.post-app h2 a { color: inherit; text-decoration: none; }
.post-app h2 a:hover { color: var(--primary); }
.post-app-copy p:not(.eyebrow) { margin-top: 4px; color: var(--ink-soft); font-size: 14.5px; }
.post-app-actions { display: flex; flex-wrap: wrap; gap: 8px; grid-column: 1 / -1; }

.not-found .page-hero-inner { padding-block: 72px; }

/* ---------- footer ---------- */
.site-footer { margin-top: 32px; background: var(--surface-low); box-shadow: 0 -1px 12px rgba(0, 0, 0, .03); }
.footer-grid { display: grid; gap: 32px; padding-block: 48px 32px; }
.footer-brand p { max-width: 320px; margin-top: 14px; color: var(--ink-soft); font-size: 13.5px; line-height: 1.6; }
.footer-title { margin-bottom: 12px; font-size: 15px; letter-spacing: 0; }
.site-footer ul { display: grid; gap: 8px; list-style: none; font-size: 14px; }
.site-footer ul a { color: var(--ink-soft); text-decoration: none; }
.site-footer ul a:hover, .site-footer ul a[aria-current] { color: var(--primary); }
.footer-bottom { padding-block: 20px 28px; border-top: 1px solid var(--line-strong); color: var(--muted); font-size: 13px; }

/* ---------- responsive ---------- */
@media (min-width: 640px) {
  :root { --gutter: 32px; }
  .metrics dl { grid-template-columns: repeat(4, 1fr); }
  .compare { grid-template-columns: 1fr 1fr; }
  .post-app { grid-template-columns: auto 1fr auto; align-items: center; }
  .post-app-actions { grid-column: auto; }
  .footer-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-brand { grid-column: 1 / -1; }
}
@media (min-width: 1024px) {
  :root { --gutter: 48px; }
  .section { padding-block: 56px; }
  .mosaic { grid-template-columns: 1fr 1fr; padding: 48px; gap: 48px; }
  .app-hero-grid { grid-template-columns: 7fr 5fr; padding-block: 56px 80px; }
  .split { grid-template-columns: 1fr 1fr; gap: 56px; }
  .split-reverse .split-copy { order: 2; }
  .specs-faq { grid-template-columns: 5fr 7fr; gap: 48px; }
  .cta-band { grid-template-columns: 1.3fr 1fr; padding: 48px 56px; }
  .cta-actions { justify-content: flex-end; }
  .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; }
  .footer-brand { grid-column: auto; }
}
@media (max-width: 639px) {
  .stats { grid-template-columns: repeat(2, 1fr); padding: 18px; }
  .stats dd { font-size: 30px; }
  .metrics dd { font-size: 23px; }
  .metrics div { padding: 16px 10px; }
  .hero-inner { padding-block: 44px 72px; }
  .app-id { align-items: flex-start; }
  .app-icon-lg { width: 68px; height: 68px; border-radius: 16px; }
  .cta-row .btn, .cta-actions .btn { width: 100%; }
  .mosaic, .cta-band, .note-card, .specs-card { padding: 24px; }
  .showcase { min-height: 300px; padding: 20px 16px 88px; }
  .showcase .shot-compact { width: 88%; }
  .showcase .menu-mock-compact { width: 70%; }
}
@media (max-width: 420px) {
  .brand-tag { display: none; }
  .brand-name { font-size: 17px; }
  .site-nav a { padding: 6px 9px; }
  .lang-switch .icon { display: none; }
  .header-inner { gap: 6px; }
  .card-actions { grid-template-columns: 1fr; }
}
@media (max-width: 359px) {
  .icon-button, .brand-text { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}
@media print {
  .site-header, .site-footer, .cta-band, .skip-link { display: none; }
}