:root {
  --bg: #faf8f5;
  --bg-alt: #f2eee8;
  --surface: #ffffff;
  --ink: #17140f;
  --ink-2: #4a443b;
  --ink-3: #7a7266;
  --line: #e4ded4;
  --accent: #e2762f;
  --accent-ink: #b8561a;
  --accent-soft: #fbe9db;
  --amber: #efa83a;
  --rose: #d9505e;
  --code-bg: #1b1814;
  --code-ink: #efe9df;
  --code-dim: #8f8678;
  --radius: 14px;
  --maxw: 1160px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #12100d;
    --bg-alt: #1a1713;
    --surface: #1f1b16;
    --ink: #f3eee6;
    --ink-2: #c4bcb0;
    --ink-3: #8f8678;
    --line: #2f2a23;
    --accent: #f08a45;
    --accent-ink: #f4a067;
    --accent-soft: #3a2416;
    --code-bg: #0b0a08;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #12100d;
  --bg-alt: #1a1713;
  --surface: #1f1b16;
  --ink: #f3eee6;
  --ink-2: #c4bcb0;
  --ink-3: #8f8678;
  --line: #2f2a23;
  --accent: #f08a45;
  --accent-ink: #f4a067;
  --accent-soft: #3a2416;
  --code-bg: #0b0a08;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 17px/1.6 "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
h1, h2, h3 { font-family: "Manrope", "Inter", sans-serif; letter-spacing: -0.02em; line-height: 1.15; margin: 0; }
p { margin: 0; }
code, .mono { font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
@media (max-width: 640px) { .wrap { padding: 0 16px; } }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: saturate(1.4) blur(12px);
  -webkit-backdrop-filter: saturate(1.4) blur(12px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 24px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font: 700 19px/1 "Manrope", sans-serif; letter-spacing: -0.02em; }
.brand img { width: 30px; height: 30px; }
.nav { display: flex; align-items: center; gap: 28px; }
.nav a { text-decoration: none; color: var(--ink-2); font-size: 15px; font-weight: 500; }
.nav a:hover { color: var(--ink); }
.nav .btn { color: #fff; }
.menu-toggle { display: none; background: none; border: 1px solid var(--line); border-radius: 10px; padding: 8px 10px; color: var(--ink); cursor: pointer; }
@media (max-width: 860px) {
  .menu-toggle { display: inline-flex; }
  .nav {
    position: absolute; top: 68px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--bg); border-bottom: 1px solid var(--line);
    padding: 8px 16px 16px; display: none;
  }
  .nav.open { display: flex; }
  .nav a { padding: 12px 0; border-bottom: 1px solid var(--line); }
  .nav .btn { margin-top: 12px; text-align: center; border: 0; }
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 20px; border-radius: 10px; font-weight: 600; font-size: 15px;
  text-decoration: none; border: 1px solid transparent; transition: transform .15s, background .15s, border-color .15s;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-ink); transform: translateY(-1px); }
.btn-ghost { border-color: var(--line); color: var(--ink); background: var(--surface); }
.btn-ghost:hover { border-color: var(--ink-3); }
.btn-sm { padding: 9px 16px; font-size: 14px; }

/* Hero */
.hero { padding: 88px 0 72px; position: relative; }
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(600px 300px at 85% 10%, color-mix(in srgb, var(--amber) 18%, transparent), transparent 70%),
    radial-gradient(500px 280px at 70% 60%, color-mix(in srgb, var(--rose) 10%, transparent), transparent 70%);
}
.hero .wrap { display: grid; grid-template-columns: 1.05fr 1fr; gap: 56px; align-items: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 600; letter-spacing: .04em; text-transform: uppercase;
  color: var(--accent-ink); background: var(--accent-soft);
  padding: 6px 12px; border-radius: 999px; margin-bottom: 22px;
}
.eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); }
.hero h1 { font-size: clamp(38px, 5.4vw, 62px); font-weight: 800; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero .lede { margin-top: 22px; font-size: 19px; color: var(--ink-2); max-width: 34em; }
.hero .ctas { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.hero .note { margin-top: 20px; font-size: 14px; color: var(--ink-3); }
@media (max-width: 960px) {
  .hero { padding: 56px 0 48px; }
  .hero .wrap { grid-template-columns: 1fr; gap: 40px; }
}

/* Code panel */
.panel {
  background: var(--code-bg); color: var(--code-ink);
  border-radius: var(--radius); overflow: hidden;
  box-shadow: 0 30px 60px -30px rgba(40, 20, 0, .45), 0 0 0 1px rgba(255,255,255,.04) inset;
  font: 13.5px/1.7 "JetBrains Mono", ui-monospace, monospace;
  min-width: 0;
}
.panel-bar { display: flex; align-items: center; gap: 8px; padding: 12px 16px; border-bottom: 1px solid rgba(255,255,255,.07); color: var(--code-dim); font-size: 12px; }
.panel-bar i { width: 10px; height: 10px; border-radius: 50%; background: #3a342c; display: inline-block; }
.panel-bar span { margin-left: 8px; }
.panel pre { margin: 0; padding: 18px 20px 20px; overflow-x: auto; }
.k { color: #f4a067; } .s { color: #e9c46a; } .c { color: var(--code-dim); } .n { color: #f28b95; } .f { color: #9fd0c4; }
.run { border-top: 1px solid rgba(255,255,255,.07); padding: 14px 20px; display: grid; gap: 6px; font-size: 12.5px; }
.run .row { display: flex; justify-content: space-between; gap: 12px; }
.run .ok { color: #9fd0c4; } .run .bad { color: #f28b95; }
.bar { height: 6px; border-radius: 3px; background: rgba(255,255,255,.08); overflow: hidden; margin-top: 4px; }
.bar b { display: block; height: 100%; width: 72%; background: linear-gradient(90deg, var(--rose), var(--accent), var(--amber)); }

/* Sections */
section { padding: 96px 0; }
section.alt { background: var(--bg-alt); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-head { max-width: 720px; margin-bottom: 52px; }
.section-head .kicker { font-size: 13px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--accent-ink); margin-bottom: 14px; }
.section-head h2 { font-size: clamp(30px, 3.6vw, 42px); font-weight: 800; }
.section-head p { margin-top: 16px; color: var(--ink-2); font-size: 18px; }
@media (max-width: 640px) { section { padding: 64px 0; } .section-head { margin-bottom: 36px; } }

/* Cards */
.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
@media (max-width: 900px) { .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 680px) { .grid-2, .grid-3 { grid-template-columns: 1fr; } }
.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; display: flex; flex-direction: column; gap: 12px;
}
.card h3 { font-size: 21px; font-weight: 700; }
.card p { color: var(--ink-2); font-size: 16px; }
.card ul { margin: 4px 0 0; padding: 0; list-style: none; display: grid; gap: 8px; }
.card li { position: relative; padding-left: 22px; font-size: 15px; color: var(--ink-2); }
.card li::before { content: ""; position: absolute; left: 2px; top: .62em; width: 8px; height: 8px; border-radius: 2px; background: var(--accent); transform: rotate(45deg); }
.icon {
  width: 44px; height: 44px; border-radius: 11px; display: grid; place-items: center;
  background: var(--accent-soft); color: var(--accent-ink);
}
.icon svg { width: 22px; height: 22px; }

/* Steps */
.steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px; counter-reset: step; }
@media (max-width: 900px) { .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .steps { grid-template-columns: 1fr; } }
.step { padding: 24px; border-top: 3px solid var(--accent); background: var(--surface); border-radius: 0 0 var(--radius) var(--radius); border-left: 1px solid var(--line); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.step:nth-child(2) { border-top-color: var(--amber); }
.step:nth-child(3) { border-top-color: var(--rose); }
.step:nth-child(4) { border-top-color: var(--ink); }
.step::before { counter-increment: step; content: "0" counter(step); font: 600 13px/1 "JetBrains Mono", monospace; color: var(--ink-3); }
.step h3 { font-size: 19px; margin: 12px 0 8px; }
.step p { font-size: 15px; color: var(--ink-2); }

/* Deliverables */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: start; }
@media (max-width: 900px) { .split { grid-template-columns: 1fr; gap: 32px; } }
.checklist { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.checklist li { display: grid; grid-template-columns: 26px 1fr; gap: 12px; align-items: start; }
.checklist .tick { width: 26px; height: 26px; border-radius: 8px; background: var(--accent-soft); color: var(--accent-ink); display: grid; place-items: center; }
.checklist .tick svg { width: 15px; height: 15px; }
.checklist b { display: block; font-weight: 600; }
.checklist span { color: var(--ink-2); font-size: 15px; }
.tree { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 24px; font: 14px/1.85 "JetBrains Mono", monospace; color: var(--ink-2); overflow-x: auto; white-space: pre; }
.tree .d { color: var(--ink); font-weight: 600; }
.tree .c { color: var(--ink-3); }

/* Domains strip */
.chips { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 36px; }
.chip { padding: 8px 14px; border-radius: 999px; border: 1px solid var(--line); background: var(--surface); font-size: 14px; color: var(--ink-2); }

/* Vision */
.vision-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
@media (max-width: 900px) { .vision-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .vision-grid { grid-template-columns: 1fr; } }
.vision-item { background: var(--surface); padding: 26px; }
.vision-item h3 { font-size: 18px; margin-bottom: 8px; display: flex; align-items: center; gap: 10px; }
.vision-item h3 .sw { width: 12px; height: 12px; border-radius: 3px; transform: rotate(45deg); flex: none; }
.vision-item p { font-size: 15px; color: var(--ink-2); }
.callout { margin-top: 28px; display: flex; gap: 16px; align-items: flex-start; padding: 22px 24px; border-radius: var(--radius); background: var(--surface); border: 1px dashed var(--ink-3); }
.callout p { color: var(--ink-2); font-size: 15px; }
.callout b { color: var(--ink); }

/* Principles */
.principles { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 32px; }
@media (max-width: 900px) { .principles { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 520px) { .principles { grid-template-columns: 1fr; } }
.principles h3 { font-size: 18px; margin-bottom: 8px; }
.principles p { color: var(--ink-2); font-size: 15px; }

/* Contact */
.contact {
  background: var(--code-bg); color: var(--code-ink); border-radius: 22px;
  padding: 56px; display: grid; grid-template-columns: 1.2fr 1fr; gap: 48px; align-items: center;
  position: relative; overflow: hidden;
}
.contact::after {
  content: ""; position: absolute; right: -80px; bottom: -80px; width: 320px; height: 320px;
  background: url("mark-512.png") center / contain no-repeat; opacity: .12; pointer-events: none;
}
.contact h2 { font-size: clamp(28px, 3.4vw, 40px); font-weight: 800; color: #fff; }
.contact p { margin-top: 14px; color: #c9c0b3; font-size: 17px; }
.contact .ctas { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.contact .btn-ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,.2); }
.contact .btn-ghost:hover { border-color: rgba(255,255,255,.5); }
.contact dl { margin: 0; display: grid; gap: 18px; position: relative; z-index: 1; }
.contact dt { font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--code-dim); }
.contact dd { margin: 4px 0 0; font-size: 17px; }
.contact dd a { color: #fff; text-decoration: none; border-bottom: 1px solid rgba(255,255,255,.25); }
.contact dd a:hover { border-bottom-color: var(--accent); }
@media (max-width: 860px) { .contact { grid-template-columns: 1fr; padding: 36px 24px; gap: 32px; } }

/* Footer */
.site-footer { padding: 40px 0 48px; color: var(--ink-3); font-size: 14px; }
.site-footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px; align-items: center; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 20px; }
.site-footer a { text-decoration: none; }
.site-footer a:hover { color: var(--ink); }

/* Prose (privacy) */
.prose { max-width: 760px; padding: 72px 0 96px; }
.prose h1 { font-size: clamp(32px, 4vw, 44px); font-weight: 800; margin-bottom: 8px; }
.prose .updated { color: var(--ink-3); font-size: 15px; margin-bottom: 40px; }
.prose h2 { font-size: 22px; margin: 40px 0 12px; }
.prose p, .prose li { color: var(--ink-2); }
.prose p + p { margin-top: 12px; }
.prose ul { padding-left: 20px; display: grid; gap: 8px; }
.prose a { color: var(--accent-ink); }

/* 404 */
.notfound { min-height: 60vh; display: grid; place-items: center; text-align: center; padding: 80px 0; }
.notfound h1 { font-size: clamp(56px, 10vw, 120px); font-weight: 800; color: var(--accent); }
.notfound p { color: var(--ink-2); margin: 12px 0 28px; font-size: 18px; }

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .btn { transition: none; } }
@media (max-width: 560px) {
  .panel { font-size: 12px; }
  .panel pre { padding: 16px; }
  .run { padding: 12px 16px; font-size: 11.5px; }
}