:root {
  --primary: #f54e00;
  --primary-active: #d04200;
  --canvas: #f7f7f4;
  --canvas-soft: #fafaf7;
  --surface-card: #ffffff;
  --surface-strong: #e6e5e0;
  --hairline: #e6e5e0;
  --hairline-soft: #efeee8;
  --hairline-strong: #cfcdc4;
  --ink: #26251e;
  --body: #5a5852;
  --muted: #807d72;
  --muted-soft: #a09c92;
  --on-primary: #ffffff;
  --tl-thinking: #dfa88f;
  --tl-grep: #9fc9a2;
  --tl-read: #9fbbe0;
  --tl-edit: #c0a8dd;
  --tl-done: #c08532;
  --success: #1f8a65;
  --error: #cf2d56;
  --sans: "Inter", system-ui, "Helvetica Neue", Helvetica, Arial, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --r-xs: 4px;
  --r-sm: 6px;
  --r-md: 8px;
  --r-lg: 12px;
  --r-xl: 16px;
  --r-pill: 9999px;
  --maxw: 1200px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--canvas);
  color: var(--body);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.5;
  letter-spacing: -0.15px;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: var(--ink); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

.skip-link {
  position: absolute; left: -999px; top: 0;
  background: var(--ink); color: var(--canvas);
  padding: 10px 16px; border-radius: var(--r-md); z-index: 200;
}
.skip-link:focus { left: 16px; top: 16px; }

h1, h2, h3 { color: var(--ink); font-weight: 400; margin: 0 0 16px; }
h1 { font-size: 72px; line-height: 1.1; letter-spacing: -2.16px; }
h2 { font-size: 36px; line-height: 1.2; letter-spacing: -0.72px; }
h3 { font-size: 26px; line-height: 1.25; letter-spacing: -0.325px; }
p { margin: 0 0 16px; }

.section { padding: 80px 0; }
.section-soft { background: var(--canvas-soft); }

.section-label {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 16px;
}

.lead { font-size: 18px; color: var(--body); max-width: 64ch; }

.top-nav {
  background: var(--canvas);
  border-bottom: 1px solid var(--hairline);
  position: sticky; top: 0; z-index: 100;
}
.nav-inner { height: 64px; display: flex; align-items: center; justify-content: space-between; }
.wordmark { font-size: 18px; font-weight: 600; color: var(--ink); letter-spacing: -0.3px; }
.wordmark-accent { color: var(--primary); }
.nav-menu { display: flex; gap: 24px; align-items: center; }
.nav-link { font-size: 14px; font-weight: 500; color: var(--body); }
.nav-link:hover { color: var(--ink); text-decoration: none; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { width: 22px; height: 2px; background: var(--ink); display: block; }

.hero { background: var(--canvas); padding: 88px 0 72px; border-bottom: 1px solid var(--hairline); }
.hero-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: center; }
.hero h1 { margin-bottom: 20px; }
.hero .lead { margin-bottom: 24px; }
.hero-figure { border: 1px solid var(--hairline); border-radius: var(--r-lg); overflow: hidden; background: var(--surface-card); }
.hero-figure img { aspect-ratio: 4 / 3; object-fit: cover; width: 100%; }
.figure-caption { font-size: 13px; line-height: 1.4; color: var(--muted); padding: 12px 16px; }

.badge-row { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.badge-pill {
  background: var(--surface-strong); color: var(--ink);
  font-family: var(--mono); font-size: 11px; font-weight: 600;
  letter-spacing: 0.88px; text-transform: uppercase;
  border-radius: var(--r-pill); padding: 4px 10px;
}

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 14px; font-weight: 500; line-height: 1;
  border-radius: var(--r-md); padding: 12px 18px; border: 1px solid transparent;
  cursor: pointer; font-family: var(--sans);
}
.btn-ink { background: var(--ink); color: var(--canvas); height: 44px; }
.btn-ink:hover { background: #1c1b15; text-decoration: none; }
.btn-ghost { background: var(--surface-card); color: var(--ink); border-color: var(--hairline-strong); height: 44px; }
.btn-ghost:hover { background: var(--canvas-soft); text-decoration: none; }
.btn[disabled] { opacity: 0.6; cursor: not-allowed; }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }

.card {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--r-lg);
  padding: 24px;
}
.card h3 { font-size: 22px; letter-spacing: -0.11px; }
.card-kicker { font-family: var(--mono); font-size: 11px; font-weight: 600; letter-spacing: 0.88px; text-transform: uppercase; color: var(--muted); margin-bottom: 12px; }
.card-title { font-size: 18px; font-weight: 600; color: var(--ink); margin: 0 0 8px; line-height: 1.4; letter-spacing: 0; }
.card-thumb { border-radius: var(--r-md); overflow: hidden; margin-bottom: 16px; border: 1px solid var(--hairline); }
.card-thumb img { aspect-ratio: 16 / 10; object-fit: cover; width: 100%; }
.card-meta { font-size: 13px; color: var(--muted); margin-top: 12px; }
.read-link { font-size: 14px; font-weight: 500; color: var(--ink); display: inline-block; margin-top: 12px; }

.timeline { display: flex; flex-wrap: wrap; gap: 8px; margin: 24px 0; }
.tl-pill {
  font-family: var(--mono); font-size: 11px; font-weight: 600;
  letter-spacing: 0.88px; text-transform: uppercase;
  border-radius: var(--r-pill); padding: 4px 10px; color: var(--ink);
}
.tl-thinking { background: var(--tl-thinking); }
.tl-grep { background: var(--tl-grep); }
.tl-read { background: var(--tl-read); }
.tl-edit { background: var(--tl-edit); }
.tl-done { background: var(--tl-done); color: var(--on-primary); }

.season-table { width: 100%; border-collapse: collapse; background: var(--surface-card); border: 1px solid var(--hairline); border-radius: var(--r-lg); overflow: hidden; font-size: 14px; }
.season-table caption { text-align: left; font-size: 13px; color: var(--muted); padding: 0 0 12px; caption-side: bottom; }
.season-table th, .season-table td { text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--hairline-soft); }
.season-table thead th { font-family: var(--mono); font-size: 11px; font-weight: 600; letter-spacing: 0.88px; text-transform: uppercase; color: var(--muted); background: var(--canvas-soft); }
.season-table tbody tr:last-child td { border-bottom: 0; }
.season-table td:first-child, .season-table th:first-child { color: var(--ink); font-weight: 500; }

.code-block { background: var(--surface-card); border: 1px solid var(--hairline); border-radius: var(--r-lg); padding: 20px; font-family: var(--mono); font-size: 13px; color: var(--ink); overflow-x: auto; line-height: 1.6; }

.article-hero { padding: 56px 0 32px; border-bottom: 1px solid var(--hairline); background: var(--canvas); }
.article-body { padding: 48px 0 80px; }
.article-wrap { max-width: 760px; margin: 0 auto; }
.article-wrap h2 { font-size: 26px; letter-spacing: -0.325px; margin-top: 40px; }
.article-wrap h3 { font-size: 22px; letter-spacing: -0.11px; margin-top: 28px; }
.article-wrap ul, .article-wrap ol { padding-left: 22px; margin: 0 0 16px; }
.article-wrap li { margin-bottom: 8px; }
.article-figure { margin: 28px 0; border: 1px solid var(--hairline); border-radius: var(--r-lg); overflow: hidden; background: var(--surface-card); }
.article-figure img { aspect-ratio: 16 / 9; object-fit: cover; width: 100%; }
.callout { background: var(--canvas-soft); border: 1px solid var(--hairline); border-left: 3px solid var(--tl-done); border-radius: var(--r-md); padding: 16px 20px; margin: 24px 0; }
.callout p:last-child { margin-bottom: 0; }
.updated { font-family: var(--mono); font-size: 11px; font-weight: 600; letter-spacing: 0.88px; text-transform: uppercase; color: var(--muted); }

.breadcrumb { font-size: 13px; color: var(--muted); margin-bottom: 16px; }
.breadcrumb a { color: var(--muted); }

.related { border-top: 1px solid var(--hairline); margin-top: 40px; padding-top: 24px; }
.related h2 { font-size: 22px; letter-spacing: -0.11px; }

.contact-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 48px; align-items: start; }
.form-card { background: var(--surface-card); border: 1px solid var(--hairline); border-radius: var(--r-lg); padding: 32px; }
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 14px; font-weight: 500; color: var(--ink); margin-bottom: 6px; }
.field input {
  width: 100%; height: 44px; padding: 12px 16px;
  background: var(--surface-card); color: var(--ink);
  border: 1px solid var(--hairline-strong); border-radius: var(--r-md);
  font-family: var(--sans); font-size: 16px;
}
.field input:focus { outline: 2px solid var(--ink); outline-offset: 1px; border-color: var(--ink); }
.field input:invalid:not(:placeholder-shown) { border-color: var(--error); }
.form-status { font-size: 14px; margin-top: 12px; min-height: 20px; }
.form-status.success { color: var(--success); }
.contact-info dt { font-family: var(--mono); font-size: 11px; font-weight: 600; letter-spacing: 0.88px; text-transform: uppercase; color: var(--muted); margin-top: 16px; }
.contact-info dd { margin: 4px 0 0; color: var(--ink); }

.ref-list { list-style: none; padding: 0; margin: 0; }
.ref-list li { padding: 12px 0; border-bottom: 1px solid var(--hairline-soft); font-size: 14px; }
.ref-list li:last-child { border-bottom: 0; }
.ref-list a { color: var(--ink); }

.footer { background: var(--canvas); border-top: 1px solid var(--hairline); padding: 64px 0 48px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 32px; }
.footer-head { font-family: var(--mono); font-size: 11px; font-weight: 600; letter-spacing: 0.88px; text-transform: uppercase; color: var(--muted); margin-bottom: 12px; }
.footer-link { display: block; font-size: 14px; color: var(--body); padding: 4px 0; }
.footer-link:hover { color: var(--ink); }
.footer-note { font-size: 14px; color: var(--body); margin-top: 12px; max-width: 36ch; }
.footer-bottom { margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--hairline); }
.footer-disclaimer { font-size: 13px; color: var(--muted); max-width: 80ch; }
.footer-copy { font-size: 13px; color: var(--muted-soft); margin-bottom: 0; }

.cookie-banner { position: fixed; left: 0; right: 0; bottom: 0; background: var(--surface-card); border-top: 1px solid var(--hairline-strong); z-index: 150; }
.cookie-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 16px 24px; }
.cookie-text { font-size: 14px; color: var(--body); margin: 0; max-width: 70ch; }
.cookie-actions { display: flex; gap: 12px; flex-shrink: 0; }

@media (max-width: 1024px) {
  h1 { font-size: 56px; letter-spacing: -1.4px; }
  .hero-grid { grid-template-columns: 1fr; gap: 32px; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .nav-menu { display: none; position: absolute; top: 64px; left: 0; right: 0; flex-direction: column; gap: 0; background: var(--canvas); border-bottom: 1px solid var(--hairline); padding: 8px 0; }
  .nav-menu.open { display: flex; }
  .nav-menu .nav-link { padding: 12px 24px; width: 100%; }
}

@media (max-width: 640px) {
  h1 { font-size: 32px; letter-spacing: -0.8px; }
  h2 { font-size: 28px; letter-spacing: -0.5px; }
  .section { padding: 56px 0; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .cookie-inner { flex-direction: column; align-items: flex-start; }
}