/* MarkCraft website — tokens mirror the extension (src/shared/ui.css). */
:root {
  --bg: #fafafc;
  --bg-2: #f3f3f8;
  --panel: #ffffff;
  --fg: #16161f;
  --muted: #5f5f72;
  --faint: #9b9bab;
  --border: #e6e6ee;
  --accent: #5b5bd6;
  --accent-2: #8b5cf6;
  --accent-soft: rgba(91, 91, 214, 0.1);
  --grad: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  --grad-text: linear-gradient(120deg, #4f46e5 0%, #8b5cf6 60%, #c026d3 100%);
  --glow-1: rgba(99, 102, 241, 0.22);
  --glow-2: rgba(139, 92, 246, 0.18);
  --shadow: 0 1px 2px rgba(16, 16, 40, 0.06), 0 8px 24px rgba(16, 16, 40, 0.06);
  --shadow-lg: 0 2px 6px rgba(16, 16, 40, 0.06), 0 30px 80px -20px rgba(40, 30, 120, 0.28);
  --radius: 12px;
  --radius-lg: 18px;
  --font: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans', Helvetica, Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, 'Liberation Mono', monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    --bg: #0d0d12; --bg-2: #13131a; --panel: #17171f; --fg: #ececf2; --muted: #a2a2b5; --faint: #6f6f80; --border: #262631;
    --accent: #9a9bfa; --accent-soft: rgba(139, 140, 248, 0.14);
    --grad-text: linear-gradient(120deg, #a5b4fc 0%, #c4b5fd 55%, #f0abfc 100%);
    --glow-1: rgba(99, 102, 241, 0.25); --glow-2: rgba(168, 85, 247, 0.16);
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.5), 0 8px 24px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 2px 6px rgba(0, 0, 0, 0.5), 0 30px 80px -20px rgba(0, 0, 0, 0.8);
    color-scheme: dark;
  }
}
:root[data-theme='dark'] {
  --bg: #0d0d12; --bg-2: #13131a; --panel: #17171f; --fg: #ececf2; --muted: #a2a2b5; --faint: #6f6f80; --border: #262631;
  --accent: #9a9bfa; --accent-soft: rgba(139, 140, 248, 0.14);
  --grad-text: linear-gradient(120deg, #a5b4fc 0%, #c4b5fd 55%, #f0abfc 100%);
  --glow-1: rgba(99, 102, 241, 0.25); --glow-2: rgba(168, 85, 247, 0.16);
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.5), 0 8px 24px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 2px 6px rgba(0, 0, 0, 0.5), 0 30px 80px -20px rgba(0, 0, 0, 0.8);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.6 var(--font); -webkit-font-smoothing: antialiased; overflow-x: hidden; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
code { font-family: var(--mono); font-size: 0.88em; padding: 0.12em 0.4em; border-radius: 6px; background: var(--accent-soft); color: var(--accent); }
kbd { font: 0.8em var(--mono); padding: 1px 6px; border: 1px solid var(--border); border-bottom-width: 2px; border-radius: 6px; background: var(--panel); color: var(--muted); }
h1, h2, h3 { margin: 0; letter-spacing: -0.02em; line-height: 1.15; }
.i { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; flex: none; }
.wrap { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.wrap-wide { width: 100%; max-width: 1240px; margin: 0 auto; padding: 0 24px; }
.center { text-align: center; }
.muted { color: var(--faint); }

/* Theme-dependent images */
.dark-only { display: none !important; }
:root[data-theme='dark'] .dark-only { display: block !important; }
:root[data-theme='dark'] .light-only { display: none !important; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) .dark-only { display: block !important; }
  :root:not([data-theme='light']) .light-only { display: none !important; }
}

/* Nav */
.nav { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--bg) 78%, transparent); backdrop-filter: saturate(1.6) blur(14px); -webkit-backdrop-filter: saturate(1.6) blur(14px); border-bottom: 1px solid transparent; transition: border-color 0.2s; }
.nav.scrolled { border-bottom-color: var(--border); }
.nav-inner { display: flex; align-items: center; gap: 24px; height: 60px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; font-size: 17px; letter-spacing: -0.01em; }
.brand.small { font-size: 14px; gap: 8px; }
.nav-links { display: flex; gap: 4px; margin-right: auto; }
.nav-links a { padding: 6px 12px; border-radius: 8px; color: var(--muted); font-size: 14.5px; font-weight: 500; }
.nav-links a:hover { color: var(--fg); background: var(--accent-soft); }
.nav-actions { display: flex; align-items: center; gap: 4px; }
.icon-btn { display: inline-flex; align-items: center; gap: 6px; height: 36px; min-width: 36px; justify-content: center; padding: 0 9px; border: 0; border-radius: 9px; background: none; color: var(--muted); font: 500 13.5px var(--font); cursor: pointer; }
.icon-btn:hover { color: var(--fg); background: var(--accent-soft); }
.icon-btn .moon { display: none; }
:root[data-theme='dark'] .icon-btn .sun { display: none; }
:root[data-theme='dark'] .icon-btn .moon { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) .icon-btn .sun { display: none; }
  :root:not([data-theme='light']) .icon-btn .moon { display: block; }
}
.stars { font-variant-numeric: tabular-nums; }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 8px; height: 46px; padding: 0 22px; border-radius: 12px; font-weight: 600; font-size: 15.5px; transition: transform 0.15s, box-shadow 0.15s, background 0.15s; }
.btn.primary { color: #fff; background: var(--grad); box-shadow: 0 6px 20px -6px rgba(99, 102, 241, 0.7), inset 0 1px 0 rgba(255, 255, 255, 0.2); }
.btn.primary:hover { transform: translateY(-1px); box-shadow: 0 10px 26px -6px rgba(99, 102, 241, 0.8), inset 0 1px 0 rgba(255, 255, 255, 0.2); }
.btn.ghost { color: var(--fg); background: var(--panel); border: 1px solid var(--border); box-shadow: var(--shadow); }
.btn.ghost:hover { border-color: color-mix(in srgb, var(--accent) 40%, var(--border)); }
.btn:focus-visible, .icon-btn:focus-visible, a:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* Hero */
.hero { position: relative; padding: 72px 0 40px; isolation: isolate; }
.hero-glow { position: absolute; inset: -60px 0 auto; height: 720px; z-index: -1; pointer-events: none;
  background:
    radial-gradient(600px 340px at 30% 20%, var(--glow-1), transparent 70%),
    radial-gradient(520px 320px at 72% 30%, var(--glow-2), transparent 70%);
  mask-image: linear-gradient(to bottom, #000 55%, transparent);
}
.hero-glow::after { content: ''; position: absolute; inset: 0; opacity: 0.5;
  background-image: radial-gradient(color-mix(in srgb, var(--fg) 14%, transparent) 1px, transparent 1px); background-size: 22px 22px;
  mask-image: radial-gradient(ellipse 60% 70% at 50% 30%, #000, transparent 75%);
}
.hero-copy { text-align: center; display: flex; flex-direction: column; align-items: center; }
.pill { display: inline-flex; align-items: center; gap: 8px; padding: 5px 14px 5px 10px; border: 1px solid var(--border); border-radius: 999px; background: color-mix(in srgb, var(--panel) 80%, transparent); font-size: 13px; font-weight: 500; color: var(--muted); box-shadow: var(--shadow); }
.pill:hover { color: var(--fg); }
.pill-dot { width: 8px; height: 8px; border-radius: 50%; background: #30a46c; box-shadow: 0 0 0 3px rgba(48, 164, 108, 0.18); }
.pill-sep { color: var(--faint); }
.version { font-family: var(--mono); font-size: 12px; color: var(--accent); }
.hero h1 { margin-top: 26px; font-size: clamp(40px, 6.6vw, 76px); font-weight: 750; letter-spacing: -0.035em; line-height: 1.04; max-width: 17ch; text-wrap: balance; }
.grad { background: var(--grad-text); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lede { margin: 22px 0 0; max-width: 620px; font-size: clamp(17px, 1.9vw, 19.5px); color: var(--muted); text-wrap: pretty; }
.cta { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-top: 32px; }
.fine { margin: 18px 0 0; font-size: 13.5px; color: var(--faint); }

/* Window frame */
.window { margin: 0; border-radius: var(--radius-lg); overflow: hidden; background: var(--panel); border: 1px solid var(--border); box-shadow: var(--shadow-lg); }
.hero-shot { margin-top: 56px; }
.window-bar { display: flex; align-items: center; gap: 14px; height: 42px; padding: 0 14px; background: var(--bg-2); border-bottom: 1px solid var(--border); font-size: 12.5px; color: var(--muted); }
.dots { display: flex; gap: 7px; }
.dots i { width: 11px; height: 11px; border-radius: 50%; background: #ff5f57; }
.dots i:nth-child(2) { background: #febc2e; }
.dots i:nth-child(3) { background: #28c840; }
.tab { display: inline-flex; align-items: center; gap: 7px; padding: 5px 12px; border-radius: 8px; background: var(--panel); border: 1px solid var(--border); color: var(--fg); font-weight: 500; }
.url { flex: 1; max-width: 520px; margin: 0 auto; padding: 5px 12px; border-radius: 8px; background: var(--panel); border: 1px solid var(--border); font-family: var(--mono); font-size: 12px; color: var(--faint); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; text-align: center; }
.shot { width: 100%; }

/* Strip */
.strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-top: 72px; padding-top: 0; }
.strip > div { padding: 6px 24px; border-left: 1px solid var(--border); display: flex; flex-direction: column; gap: 4px; }
.strip > div:first-child { border-left: 0; padding-left: 0; }
.strip strong { font-size: 34px; font-weight: 750; letter-spacing: -0.03em; background: var(--grad-text); -webkit-background-clip: text; background-clip: text; color: transparent; line-height: 1.1; }
.strip span { font-size: 14.5px; color: var(--muted); line-height: 1.45; }

/* Features */
.features { padding: 64px 0 24px; }
.feature { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); align-items: center; gap: 64px; padding: 64px 24px; }
.feature.flip .feature-copy { order: 2; }
.eyebrow { margin: 0 0 14px; font: 600 13px var(--mono); letter-spacing: 0.02em; color: var(--accent); text-transform: uppercase; }
.eyebrow span:first-child { opacity: 0.55; }
.feature h2, .more h2, .install h2 { font-size: clamp(28px, 3.4vw, 40px); font-weight: 720; text-wrap: balance; }
.feature-copy > p:not(.eyebrow) { margin: 16px 0 0; color: var(--muted); font-size: 17px; text-wrap: pretty; }
.checks { list-style: none; padding: 0; margin: 24px 0 0; display: grid; gap: 10px; }
.checks li { position: relative; padding-left: 30px; font-size: 15.5px; }
.checks li::before { content: ''; position: absolute; left: 0; top: 2px; width: 20px; height: 20px; border-radius: 6px; background: var(--accent-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236366f1' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6 9 17l-5-5'/%3E%3C/svg%3E") center / 12px no-repeat; }
.feature-shot { transform: perspective(1600px) rotateY(-4deg); transform-origin: left center; transition: transform 0.5s cubic-bezier(.2,.7,.2,1); }
.feature.flip .feature-shot { transform: perspective(1600px) rotateY(4deg); transform-origin: right center; }
.feature:hover .feature-shot { transform: none; }
.stack { position: relative; padding-bottom: 14%; }
.stack .back { width: 82%; margin-left: auto; opacity: 0.98; }
.stack .front { position: absolute; left: 0; bottom: 0; width: 70%; }
.feature.flip .stack .feature-shot { transform: none; }

/* Grid */
.more { padding: 72px 24px 40px; }
.grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 40px; }
.card { padding: 22px; border-radius: var(--radius); background: var(--panel); border: 1px solid var(--border); transition: border-color 0.2s, transform 0.2s; }
.card:hover { border-color: color-mix(in srgb, var(--accent) 35%, var(--border)); transform: translateY(-2px); }
.card .i { width: 22px; height: 22px; color: var(--accent); }
.card h3 { margin-top: 14px; font-size: 16px; font-weight: 650; }
.card p { margin: 6px 0 0; font-size: 14px; color: var(--muted); line-height: 1.5; }

/* Privacy */
.privacy { margin: 72px 0 0; padding: 56px 0; background: var(--bg-2); border-block: 1px solid var(--border); }
.privacy-inner { display: flex; gap: 28px; align-items: flex-start; max-width: 860px; }
.privacy .shield { width: 52px; height: 52px; padding: 12px; border-radius: 14px; color: #fff; background: var(--grad); stroke-width: 2; box-shadow: 0 8px 24px -8px rgba(99, 102, 241, 0.7); }
.privacy h2 { font-size: clamp(24px, 3vw, 32px); font-weight: 720; }
.privacy p { margin: 10px 0 0; color: var(--muted); font-size: 17px; }

/* Install */
.install { padding: 96px 24px 40px; }
.steps { list-style: none; padding: 0; margin: 44px 0 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; counter-reset: s; }
.steps li { padding: 26px; border-radius: var(--radius-lg); background: var(--panel); border: 1px solid var(--border); box-shadow: var(--shadow); }
.num { display: inline-grid; place-items: center; width: 32px; height: 32px; border-radius: 10px; background: var(--grad); color: #fff; font-weight: 700; font-size: 15px; }
.steps h3 { margin-top: 16px; font-size: 18px; font-weight: 650; }
.steps p { margin: 8px 0 0; color: var(--muted); font-size: 15px; }
.steps p a { color: var(--accent); font-weight: 500; }
.steps p a:hover { text-decoration: underline; }
.steps b { color: var(--fg); font-weight: 600; }
.copy { font: 0.88em var(--mono); padding: 0.12em 0.45em; border: 1px dashed color-mix(in srgb, var(--accent) 45%, transparent); border-radius: 6px; background: var(--accent-soft); color: var(--accent); cursor: copy; }
.copy.done::after { content: ' ✓'; }
.source { margin: 32px auto 0; max-width: 720px; text-align: center; }
.source p { margin: 0 0 10px; color: var(--muted); font-size: 14.5px; }
.source pre { margin: 0; padding: 16px 20px; text-align: left; border-radius: var(--radius); background: #14141c; color: #e4e4f0; overflow-x: auto; font-size: 13.5px; line-height: 1.7; border: 1px solid var(--border); }
.source pre code { background: none; color: inherit; padding: 0; font-size: inherit; }

/* Final */
.final { padding: 96px 0 104px; }
.final-inner { display: flex; flex-direction: column; align-items: center; text-align: center; }
.final-inner img { filter: drop-shadow(0 12px 24px rgba(99, 102, 241, 0.35)); }
.final h2 { margin-top: 24px; font-size: clamp(30px, 4.4vw, 48px); font-weight: 750; letter-spacing: -0.03em; }
.final p { margin: 14px 0 0; max-width: 520px; color: var(--muted); font-size: 17px; }

/* Footer */
.footer { border-top: 1px solid var(--border); padding: 28px 0; font-size: 14px; }
.footer-inner { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
.footer nav { display: flex; gap: 20px; margin-right: auto; flex-wrap: wrap; }
.footer nav a { color: var(--muted); }
.footer nav a:hover { color: var(--fg); }

/* Reveal on scroll */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.6s ease, transform 0.6s cubic-bezier(.2,.7,.2,1); }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .feature-shot, .feature.flip .feature-shot { transform: none; transition: none; }
}

/* Responsive */
@media (max-width: 960px) {
  .feature { grid-template-columns: 1fr; gap: 32px; padding: 48px 24px; }
  .feature.flip .feature-copy { order: 0; }
  .feature-shot, .feature.flip .feature-shot { transform: none; }
  .grid { grid-template-columns: repeat(2, 1fr); }
  .strip { grid-template-columns: repeat(2, 1fr); row-gap: 28px; }
  .strip > div:nth-child(3) { border-left: 0; padding-left: 0; }
}
@media (max-width: 720px) {
  .wrap, .wrap-wide { padding: 0 16px; }
  .feature, .more, .install { padding-left: 16px; padding-right: 16px; }
  .nav-links { display: none; }
  .nav-actions { margin-left: auto; }
  .hero { padding-top: 48px; }
  .hero-shot { margin-top: 40px; }
  .window-bar { height: 34px; gap: 10px; }
  .window-bar .url { display: none; }
  .window-bar .tab { margin-right: auto; }
  .steps { grid-template-columns: 1fr; }
  .privacy-inner { flex-direction: column; gap: 18px; }
  .cta .btn { flex: 1 1 auto; justify-content: center; }
}
@media (max-width: 480px) {
  .grid { grid-template-columns: 1fr; }
  .strip { grid-template-columns: 1fr; }
  .strip > div { border-left: 0; padding-left: 0; }
  .footer-inner { flex-direction: column; align-items: flex-start; gap: 14px; }
}