/* ===== Tokens ===== */
:root {
  --bg: #f7f5f0;
  --bg-alt: #efece4;
  --surface: #ffffff;
  --text: #1b1d21;
  --muted: #5d6068;
  --line: #dedad0;
  --accent: #c2410c;
  --accent-ink: #ffffff;
  --accent-soft: #fbe6d9;
  --code-bg: #1d2026;
  --code-text: #e6e3db;
  --code-k: #f59e66;
  --code-s: #a3d48c;
  --code-f: #8fc1ff;
  --shadow: 0 1px 2px rgba(20, 20, 20, .04), 0 8px 24px rgba(20, 20, 20, .06);
  --radius: 14px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #14161a;
    --bg-alt: #1a1d22;
    --surface: #1f2228;
    --text: #ebe8e1;
    --muted: #a0a3ab;
    --line: #2e323a;
    --accent: #fb8a4c;
    --accent-ink: #1a0f08;
    --accent-soft: #3a2519;
    --code-bg: #0f1114;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .25);
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #14161a;
  --bg-alt: #1a1d22;
  --surface: #1f2228;
  --text: #ebe8e1;
  --muted: #a0a3ab;
  --line: #2e323a;
  --accent: #fb8a4c;
  --accent-ink: #1a0f08;
  --accent-soft: #3a2519;
  --code-bg: #0f1114;
  --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .25);
  color-scheme: dark;
}

/* ===== Base ===== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 var(--font);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { line-height: 1.2; margin: 0 0 .6em; letter-spacing: -.015em; text-wrap: balance; }
h1 { font-size: clamp(2.1rem, 5.2vw, 3.6rem); font-weight: 750; letter-spacing: -.03em; }
h2 { font-size: clamp(1.6rem, 3.4vw, 2.3rem); font-weight: 700; }
h3 { font-size: 1.1rem; font-weight: 650; }
p { margin: 0 0 1em; }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }

.wrap { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 16px; }
@media (min-width: 720px) { .wrap { padding: 0 32px; } }

.skip { position: absolute; left: -9999px; top: 8px; background: var(--surface); padding: 8px 14px; border-radius: 8px; z-index: 100; }
.skip:focus { left: 16px; }

.muted { color: var(--muted); font-weight: 600; }
.eyebrow { font: 600 .8rem/1 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--accent); margin-bottom: 1rem; }
.lead { font-size: 1.15rem; color: var(--muted); max-width: 38em; }
.note { color: var(--muted); font-size: .95rem; margin-top: -.4rem; }

/* ===== Topbar ===== */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  -webkit-backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--line);
}
.topbar__inner { display: flex; align-items: center; justify-content: space-between; height: 60px; gap: 16px; }
.logo { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 700; }
.logo__mark {
  display: grid; place-items: center; width: 34px; height: 34px; border-radius: 9px;
  background: var(--accent); color: var(--accent-ink); font: 800 .85rem/1 var(--font);
}
.nav { display: flex; gap: 4px; }
.nav a { color: var(--muted); text-decoration: none; padding: 8px 12px; border-radius: 8px; font-size: .95rem; }
.nav a:hover { color: var(--text); background: var(--bg-alt); }
.topbar__actions { display: flex; gap: 6px; }

.icon-btn {
  display: inline-grid; place-items: center; width: 40px; height: 40px;
  border: 1px solid var(--line); border-radius: 10px; background: var(--surface);
  color: var(--text); cursor: pointer; padding: 0;
}
.icon-btn:hover { border-color: var(--muted); }
.i-moon { display: none; }
:root[data-theme="dark"] .i-sun { display: none; }
:root[data-theme="dark"] .i-moon { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .i-sun { display: none; }
  :root:not([data-theme="light"]) .i-moon { display: block; }
}

.menu-btn { display: none; gap: 4px; align-content: center; }
.menu-btn span { display: block; width: 18px; height: 2px; background: currentColor; border-radius: 2px; transition: transform .2s, opacity .2s; }
.menu-btn[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.menu-btn[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-btn[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 860px) {
  .menu-btn { display: inline-grid; }
  .nav {
    position: absolute; left: 0; right: 0; top: 60px;
    flex-direction: column; gap: 0; padding: 8px 16px 16px;
    background: var(--bg); border-bottom: 1px solid var(--line);
    display: none;
  }
  .nav.is-open { display: flex; }
  .nav a { padding: 12px; font-size: 1.05rem; }
  .no-js .nav { position: static; display: flex; flex-direction: row; flex-wrap: wrap; }
}

/* ===== Hero ===== */
.hero { padding: 72px 0 64px; }
.hero__grid { display: grid; gap: 48px; align-items: center; }
@media (min-width: 960px) { .hero { padding: 112px 0 96px; } .hero__grid { grid-template-columns: 1.15fr 1fr; } }
.hero__cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 48px; padding: 0 22px; border-radius: 12px;
  font-weight: 600; text-decoration: none; border: 1px solid transparent;
  transition: transform .15s, background .15s;
}
.btn:hover { transform: translateY(-1px); }
.btn--primary { background: var(--accent); color: var(--accent-ink); }
.btn--ghost { border-color: var(--line); color: var(--text); background: var(--surface); }

.code-card {
  background: var(--code-bg); color: var(--code-text);
  border-radius: var(--radius); box-shadow: var(--shadow);
  overflow: hidden; min-width: 0;
  transform: rotate(-1deg);
}
.code-card__bar { display: flex; align-items: center; gap: 6px; padding: 12px 16px; border-bottom: 1px solid rgba(255,255,255,.08); }
.code-card__bar i { width: 10px; height: 10px; border-radius: 50%; background: rgba(255,255,255,.18); }
.code-card__bar span { margin-left: 8px; font: .78rem var(--mono); opacity: .6; }
.code-card pre { margin: 0; padding: 18px 20px 22px; overflow-x: auto; font: .82rem/1.65 var(--mono); }
.code-card .k { color: var(--code-k); }
.code-card .s { color: var(--code-s); }
.code-card .f { color: var(--code-f); }

/* ===== Sections ===== */
.section { padding: 72px 0; border-top: 1px solid var(--line); }
@media (min-width: 960px) { .section { padding: 104px 0; } }
.section--alt { background: var(--bg-alt); }

.two-col { display: grid; gap: 24px; }
@media (min-width: 900px) { .two-col { grid-template-columns: 1fr 1.6fr; gap: 64px; } }
.prose p { max-width: 40em; }

.facts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin: 32px 0 0; }
.facts div { border-top: 2px solid var(--accent); padding-top: 12px; }
.facts dt { font-size: clamp(1.6rem, 4vw, 2.2rem); font-weight: 750; letter-spacing: -.02em; }
.facts dd { margin: 0; color: var(--muted); font-size: .92rem; }

/* Cards */
.cards { display: grid; gap: 16px; margin-top: 32px; }
@media (min-width: 640px) { .cards { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1000px) { .cards { grid-template-columns: repeat(3, 1fr); } .card--wide { grid-column: span 2; } }
@media (min-width: 640px) and (max-width: 999px) { .card--wide { grid-column: span 2; } }
.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px; position: relative;
}
.card::before {
  content: ""; display: block; width: 28px; height: 3px; border-radius: 2px;
  background: var(--accent); margin-bottom: 18px;
}
.card p { color: var(--muted); margin: 0; font-size: .97rem; }

/* Stack */
.stack { display: grid; gap: 28px; }
@media (min-width: 640px) { .stack { grid-template-columns: repeat(2, 1fr); } }
.stack h3 { font: 600 .8rem/1 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--muted); margin-bottom: 12px; }
.tags { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.tags li { padding: 6px 12px; border: 1px solid var(--line); border-radius: 999px; background: var(--surface); font-size: .92rem; }

/* Steps */
.steps { list-style: none; margin: 32px 0 0; padding: 0; display: grid; gap: 16px; counter-reset: step; }
@media (min-width: 720px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1040px) { .steps { grid-template-columns: repeat(5, 1fr); } }
.steps li { counter-increment: step; padding: 20px 0 0; border-top: 1px solid var(--line); }
.steps li::before {
  content: counter(step, decimal-leading-zero);
  display: block; font: 700 1.6rem/1 var(--mono); color: var(--accent); margin-bottom: 14px;
}
.steps p { color: var(--muted); font-size: .95rem; margin: 0; }

/* Cases */
.cases { display: grid; gap: 20px; margin-top: 32px; }
@media (min-width: 820px) { .cases { grid-template-columns: repeat(2, 1fr); } }
.case {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; display: flex; flex-direction: column; box-shadow: var(--shadow);
}
.case__tag { font: 600 .78rem/1.3 var(--mono); color: var(--accent); background: var(--accent-soft); align-self: flex-start; padding: 5px 10px; border-radius: 6px; margin-bottom: 16px; }
.case p { color: var(--muted); font-size: .97rem; }
.case__result { margin: auto 0 0; padding-top: 14px; border-top: 1px dashed var(--line); color: var(--text) !important; }

/* Contact */
.section--contact { background: var(--bg-alt); }
.contact { display: grid; gap: 32px; align-items: center; }
@media (min-width: 900px) { .contact { grid-template-columns: 1.2fr 1fr; gap: 64px; } }
.contact__list { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.contact__item {
  display: flex; flex-direction: column; gap: 2px; padding: 20px 24px;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  text-decoration: none; color: var(--text); transition: border-color .15s, transform .15s;
}
.contact__item:hover { border-color: var(--accent); transform: translateX(3px); }
.contact__label { font: 600 .78rem/1.2 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
.contact__value { font-size: 1.2rem; font-weight: 650; overflow-wrap: anywhere; }

/* Footer */
.footer { border-top: 1px solid var(--line); padding: 28px 0; color: var(--muted); font-size: .92rem; }
.footer__inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; }
.footer a { color: var(--muted); }

/* 404 */
.notfound { min-height: 100vh; display: grid; place-items: center; text-align: center; padding: 32px 16px; }
.notfound__code { font: 800 clamp(5rem, 20vw, 9rem)/1 var(--mono); color: var(--accent); letter-spacing: -.04em; margin: 0 0 12px; }
.notfound p { color: var(--muted); }