@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=JetBrains+Mono:wght@400&display=swap');

: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;
  --t-thinking: #dfa88f;
  --t-grep: #9fc9a2;
  --t-read: #9fbbe0;
  --t-edit: #c0a8dd;
  --t-done: #c08532;
  --success: #1f8a65;
  --error: #cf2d56;
  --maxw: 1200px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, "Helvetica Neue", Helvetica, Arial, sans-serif;
  background: var(--canvas);
  color: var(--body);
  font-size: 16px;
  line-height: 1.5;
  letter-spacing: -0.15px;
  -webkit-font-smoothing: antialiased;
}

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

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

h1, h2, h3, h4 { color: var(--ink); font-weight: 400; line-height: 1.2; }
h1 { font-size: 56px; letter-spacing: -2.16px; }
h2 { font-size: 36px; letter-spacing: -0.72px; }
h3 { font-size: 26px; letter-spacing: -0.325px; }
h4 { font-size: 22px; letter-spacing: -0.11px; }
p { margin-bottom: 16px; }

.skip-link {
  position: absolute; left: -999px; top: 0; background: var(--ink); color: var(--canvas);
  padding: 10px 16px; z-index: 200; border-radius: 8px;
}
.skip-link:focus { left: 16px; top: 16px; }

.top-nav {
  background: var(--canvas);
  border-bottom: 1px solid var(--hairline);
  position: sticky; top: 0; z-index: 100;
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { font-size: 18px; font-weight: 600; color: var(--ink); letter-spacing: -0.3px; }
.brand:hover { text-decoration: none; }
.brand-mark { color: var(--primary); }
.nav-menu { display: flex; align-items: center; gap: 24px; }
.nav-link { font-size: 14px; font-weight: 500; color: var(--ink); }
.nav-link-cta {
  background: var(--primary); color: var(--on-primary); padding: 10px 18px;
  border-radius: 8px; height: 40px; display: inline-flex; align-items: center;
}
.nav-link-cta:hover { background: var(--primary-active); text-decoration: none; }
.nav-toggle { display: none; flex-direction: column; gap: 4px; 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: 80px 0 56px;
  border-bottom: 1px solid var(--hairline);
}
.hero-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.badge-pill {
  display: inline-block; background: var(--surface-strong); color: var(--ink);
  font-size: 11px; font-weight: 600; letter-spacing: 0.88px; text-transform: uppercase;
  border-radius: 9999px; padding: 4px 10px; margin-bottom: 20px;
}
.hero h1 { margin-bottom: 20px; }
.hero-lead { font-size: 18px; color: var(--body); max-width: 46ch; margin-bottom: 24px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.hero-media {
  border-radius: 12px; overflow: hidden; border: 1px solid var(--hairline); background: var(--surface-card);
}
.hero-media img { width: 100%; height: 420px; object-fit: cover; display: block; }
.media-caption { font-size: 13px; color: var(--muted); padding: 12px 16px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 14px; font-weight: 500; border-radius: 8px; cursor: pointer;
  border: 1px solid transparent; line-height: 1; text-decoration: none;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--primary); color: var(--on-primary); padding: 13px 20px; height: 44px; }
.btn-primary:hover { background: var(--primary-active); }
.btn-secondary { background: var(--surface-card); color: var(--ink); border-color: var(--hairline-strong); padding: 13px 20px; height: 44px; }
.btn-ink { background: var(--ink); color: var(--canvas); padding: 13px 20px; height: 44px; }

.section { padding: 80px 0; }
.section-soft { background: var(--canvas-soft); border-top: 1px solid var(--hairline); border-bottom: 1px solid var(--hairline); }
.section-label { font-size: 11px; font-weight: 600; letter-spacing: 0.88px; text-transform: uppercase; color: var(--muted); margin-bottom: 12px; }
.section-head { margin-bottom: 12px; }
.section-intro { max-width: 60ch; color: var(--body); margin-bottom: 40px; }

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

.feature-card {
  background: var(--surface-card); border: 1px solid var(--hairline); border-radius: 12px;
  padding: 24px; display: flex; flex-direction: column;
}
.feature-card h3 { font-size: 20px; margin-bottom: 8px; }
.feature-card p { font-size: 15px; color: var(--body); margin-bottom: 0; }

.article-card {
  background: var(--surface-card); border: 1px solid var(--hairline); border-radius: 12px;
  overflow: hidden; display: flex; flex-direction: column;
}
.article-card img { width: 100%; height: 200px; object-fit: cover; display: block; border-bottom: 1px solid var(--hairline); }
.article-card-body { padding: 24px; display: flex; flex-direction: column; flex: 1; }
.article-tag { font-size: 11px; font-weight: 600; letter-spacing: 0.88px; text-transform: uppercase; color: var(--muted); margin-bottom: 10px; }
.article-card h3 { font-size: 22px; margin-bottom: 10px; }
.article-card p { font-size: 15px; color: var(--body); flex: 1; }
.article-more { font-size: 14px; font-weight: 500; color: var(--primary); margin-top: 16px; }

.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: step; }
.step {
  background: var(--surface-card); border: 1px solid var(--hairline); border-radius: 12px; padding: 24px;
}
.step-num { font-family: 'JetBrains Mono', monospace; font-size: 13px; color: var(--muted); margin-bottom: 10px; }
.step h4 { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.step p { font-size: 14px; margin-bottom: 0; }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.split img { width: 100%; border-radius: 12px; border: 1px solid var(--hairline); display: block; }
.fact-list { list-style: none; margin-top: 16px; }
.fact-list li { padding: 12px 0; border-bottom: 1px solid var(--hairline-soft); font-size: 15px; color: var(--body); }
.fact-list li:last-child { border-bottom: 0; }
.fact-list strong { color: var(--ink); font-weight: 600; }

.contact-band { background: var(--canvas); }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.form-card { background: var(--surface-card); border: 1px solid var(--hairline); border-radius: 12px; padding: 32px; }
.field { margin-bottom: 20px; }
.field label { display: block; font-size: 14px; font-weight: 600; color: var(--ink); margin-bottom: 6px; }
.field input, .field textarea {
  width: 100%; background: var(--surface-card); color: var(--ink);
  border: 1px solid var(--hairline-strong); border-radius: 8px; padding: 12px 16px;
  font-family: inherit; font-size: 15px;
}
.field input { height: 44px; }
.field input:focus, .field textarea:focus { outline: 2px solid var(--primary); border-color: var(--primary); }
.field textarea { min-height: 120px; resize: vertical; }
.form-status { font-size: 14px; margin-top: 12px; min-height: 20px; }
.form-status.success { color: var(--success); }
.form-status.error { color: var(--error); }
.btn[disabled] { opacity: 0.6; cursor: progress; }

.cta-band { background: var(--canvas); text-align: center; padding: 96px 0; border-top: 1px solid var(--hairline); }
.cta-band h2 { margin-bottom: 24px; }

.footer { background: var(--canvas); border-top: 1px solid var(--hairline); padding: 64px 0 32px; color: var(--body); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr 1fr; gap: 24px; }
.footer-head { font-size: 16px; font-weight: 600; margin-bottom: 16px; color: var(--ink); }
.footer-link { display: block; font-size: 14px; color: var(--body); margin-bottom: 10px; }
.footer-note { font-size: 14px; color: var(--muted); margin-top: 12px; max-width: 32ch; }
.footer-bottom { margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--hairline); }
.footer-bottom p { font-size: 13px; color: var(--muted); margin-bottom: 8px; }
.disclaimer { color: var(--muted-soft); }

.article-hero { padding: 64px 0 40px; border-bottom: 1px solid var(--hairline); }
.article-hero .badge-pill { margin-bottom: 16px; }
.breadcrumb { font-size: 13px; color: var(--muted); margin-bottom: 20px; }
.breadcrumb a { color: var(--muted); }
.article-meta { font-size: 13px; color: var(--muted); margin-top: 16px; font-family: 'JetBrains Mono', monospace; }
.article-body { padding: 56px 0 80px; }
.article-layout { display: grid; grid-template-columns: minmax(0, 720px) 1fr; gap: 56px; }
.prose h2 { font-size: 30px; margin: 40px 0 16px; }
.prose h3 { font-size: 22px; margin: 28px 0 12px; }
.prose p { font-size: 16px; color: var(--body); letter-spacing: 0.08px; }
.prose ul, .prose ol { margin: 0 0 16px 22px; }
.prose li { font-size: 16px; color: var(--body); margin-bottom: 8px; }
.prose figure { margin: 28px 0; }
.prose figure img { width: 100%; border-radius: 12px; border: 1px solid var(--hairline); display: block; }
.prose figcaption { font-size: 13px; color: var(--muted); margin-top: 8px; }
.callout { background: var(--canvas-soft); border: 1px solid var(--hairline); border-left: 3px solid var(--t-done); border-radius: 8px; padding: 20px 24px; margin: 28px 0; }
.callout h4 { font-size: 16px; font-weight: 600; margin-bottom: 8px; }
.callout p { margin-bottom: 0; font-size: 15px; }
.code-block { background: var(--surface-card); border: 1px solid var(--hairline); border-radius: 12px; padding: 20px; font-family: 'JetBrains Mono', monospace; font-size: 13px; color: var(--ink); margin: 28px 0; overflow-x: auto; }
.sidebar { position: sticky; top: 88px; align-self: start; }
.sidebar-card { background: var(--surface-card); border: 1px solid var(--hairline); border-radius: 12px; padding: 24px; margin-bottom: 24px; }
.sidebar-card h4 { font-size: 16px; font-weight: 600; margin-bottom: 12px; }
.sidebar-card a { display: block; font-size: 14px; color: var(--body); padding: 8px 0; border-bottom: 1px solid var(--hairline-soft); }
.sidebar-card a:last-child { border-bottom: 0; }

.page-body { padding: 56px 0 80px; }
.page-body .prose { max-width: 760px; margin: 0 auto; }
.page-body h1 { font-size: 44px; margin-bottom: 16px; }
.updated { font-size: 13px; color: var(--muted); font-family: 'JetBrains Mono', monospace; margin-bottom: 32px; }

.cookie-banner { position: fixed; bottom: 16px; left: 16px; right: 16px; z-index: 150; background: var(--surface-card); border: 1px solid var(--hairline-strong); border-radius: 12px; }
.cookie-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 20px 24px; }
.cookie-text { font-size: 14px; color: var(--body); margin-bottom: 0; }
.cookie-actions { display: flex; gap: 12px; flex-shrink: 0; }
.cookie-actions .btn { height: 40px; padding: 10px 18px; }

@media (max-width: 1024px) {
  h1 { font-size: 44px; }
  .footer-grid { grid-template-columns: repeat(3, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .nav-menu { display: none; position: absolute; top: 64px; left: 0; right: 0; flex-direction: column; align-items: flex-start; gap: 0; background: var(--canvas); border-bottom: 1px solid var(--hairline); padding: 8px 24px 16px; }
  .nav-menu.open { display: flex; }
  .nav-menu .nav-link { padding: 12px 0; width: 100%; }
  .hero-grid, .split, .contact-grid, .article-layout { grid-template-columns: 1fr; }
  .grid-3, .grid-2, .steps, .footer-grid { grid-template-columns: 1fr; }
  h1 { font-size: 32px; letter-spacing: -1px; }
  h2 { font-size: 28px; }
  .hero-media img { height: 280px; }
  .cookie-inner { flex-direction: column; align-items: stretch; }
  .sidebar { position: static; }
}