:root {
  --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;
  --primary: #f54e00;
  --primary-active: #d04200;
  --on-primary: #ffffff;
  --success: #1f8a65;
  --error: #cf2d56;
  --t-thinking: #dfa88f;
  --t-grep: #9fc9a2;
  --t-read: #9fbbe0;
  --t-edit: #c0a8dd;
  --t-done: #c08532;
  --maxw: 1200px;
  --r-xs: 4px;
  --r-sm: 6px;
  --r-md: 8px;
  --r-lg: 12px;
  --r-xl: 16px;
  --r-pill: 9999px;
  --font: "Inter", system-ui, "Helvetica Neue", Helvetica, Arial, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--canvas);
  color: var(--body);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.5;
  letter-spacing: -0.01em;
  -webkit-font-smoothing: antialiased;
}

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

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

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

h1, h2, h3, h4 {
  color: var(--ink);
  font-weight: 400;
  margin: 0 0 16px;
  line-height: 1.2;
}

h1 { font-size: 72px; letter-spacing: -2.16px; line-height: 1.1; }
h2 { font-size: 36px; letter-spacing: -0.72px; }
h3 { font-size: 26px; letter-spacing: -0.325px; line-height: 1.25; }
h4 { font-size: 18px; font-weight: 600; letter-spacing: 0; }

p { margin: 0 0 16px; }

.eyebrow {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 12px;
}

.topnav {
  background: var(--canvas);
  border-bottom: 1px solid var(--hairline);
  position: sticky;
  top: 0;
  z-index: 50;
}
.topnav-inner {
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.wordmark {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.02em;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.wordmark-mark { color: var(--primary); font-size: 14px; }
.nav-menu { display: flex; align-items: center; gap: 24px; }
.nav-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--body);
}
.nav-link.is-active, .nav-link:hover { color: var(--ink); }
.nav-cta {
  background: var(--primary);
  color: var(--on-primary);
  padding: 10px 18px;
  border-radius: var(--r-md);
  height: 40px;
  display: inline-flex;
  align-items: center;
}
.nav-cta:hover { background: var(--primary-active); color: var(--on-primary); }
.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 22px;
  color: var(--ink);
  cursor: pointer;
}

.section { padding: 80px 0; }
.section-tight { padding: 48px 0; }
.section-divider { border-top: 1px solid var(--hairline); }

.hero { padding: 80px 0 64px; }
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
}
.hero p.lead { font-size: 18px; color: var(--body); max-width: 46ch; }
.hero-actions { display: flex; gap: 16px; align-items: center; margin-top: 24px; flex-wrap: wrap; }

.btn {
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--r-md);
  padding: 10px 18px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: 1px solid transparent;
  font-family: var(--font);
}
.btn-primary { background: var(--primary); color: var(--on-primary); }
.btn-primary:hover { background: var(--primary-active); color: var(--on-primary); }
.btn-download { background: var(--ink); color: var(--canvas); padding: 12px 20px; height: 44px; }
.btn-download:hover { color: var(--canvas); opacity: 0.92; }
.btn-secondary { background: var(--surface-card); color: var(--ink); border: 1px solid var(--hairline-strong); }
.btn-secondary:hover { color: var(--ink); }
.btn-text { background: none; color: var(--ink); padding: 0; height: auto; }
.btn-text:hover { color: var(--primary); }

.hero-media {
  border-radius: var(--r-lg);
  border: 1px solid var(--hairline);
  overflow: hidden;
  background: var(--surface-card);
}
.hero-media img { width: 100%; height: 420px; object-fit: cover; }
.media-caption {
  font-size: 13px;
  color: var(--muted);
  padding: 12px 16px;
  border-top: 1px solid var(--hairline);
}

.badges { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 24px; }
.badge {
  background: var(--surface-strong);
  color: var(--ink);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  border-radius: var(--r-pill);
  padding: 4px 10px;
}

.section-head { max-width: 60ch; margin-bottom: 32px; }
.section-head p { color: var(--body); }

.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-article { padding: 0; overflow: hidden; display: flex; flex-direction: column; }
.card-article img { width: 100%; height: 200px; object-fit: cover; }
.card-article .card-body { padding: 24px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.card-kicker {
  font-size: 11px; font-weight: 600; letter-spacing: 0.88px; text-transform: uppercase; color: var(--muted);
}
.card-article h3 { font-size: 22px; letter-spacing: -0.11px; margin: 0; }
.card-article p { color: var(--body); margin: 0; }
.card-meta { font-size: 13px; color: var(--muted); margin-top: auto; }

.feature-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.feature-list li {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--r-md);
  padding: 16px 20px;
  color: var(--body);
}
.feature-list li strong { color: var(--ink); font-weight: 600; }

.callout {
  background: var(--canvas-soft);
  border: 1px solid var(--hairline);
  border-left: 3px solid var(--t-grep);
  border-radius: var(--r-md);
  padding: 20px 24px;
  margin: 24px 0;
  color: var(--body);
}

.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;
  margin: 24px 0;
}

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

.article-hero { padding: 56px 0 0; }
.article-wrap { max-width: 760px; margin: 0 auto; }
.article-wrap h1 { font-size: 48px; letter-spacing: -1.2px; }
.article-figure { margin: 32px 0; }
.article-figure img { width: 100%; height: 380px; object-fit: cover; border-radius: var(--r-lg); border: 1px solid var(--hairline); }
.article-figure figcaption { font-size: 13px; color: var(--muted); margin-top: 12px; }
.article-body h2 { font-size: 30px; margin-top: 40px; }
.article-body h3 { font-size: 22px; letter-spacing: -0.11px; margin-top: 28px; }
.article-body ul, .article-body ol { color: var(--body); padding-left: 22px; }
.article-body li { margin-bottom: 8px; }
.article-meta { font-size: 13px; color: var(--muted); }
.divider { border: none; border-top: 1px solid var(--hairline); margin: 40px 0; }

.related { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin-top: 16px; }
.related a { border: 1px solid var(--hairline); border-radius: var(--r-md); padding: 16px 20px; background: var(--surface-card); }
.related a span { display: block; font-size: 11px; letter-spacing: 0.88px; text-transform: uppercase; color: var(--muted); margin-bottom: 4px; }

.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: 600; color: var(--ink); margin-bottom: 8px; }
.field input {
  width: 100%;
  background: var(--surface-card);
  border: 1px solid var(--hairline-strong);
  border-radius: var(--r-md);
  padding: 12px 16px;
  height: 44px;
  font-size: 16px;
  font-family: var(--font);
  color: var(--ink);
}
.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-note { font-size: 13px; color: var(--muted); }
.form-status { font-size: 14px; margin-top: 12px; min-height: 20px; }
.form-status.success { color: var(--success); }
.contact-meta dl { margin: 0; }
.contact-meta dt { font-size: 11px; letter-spacing: 0.88px; text-transform: uppercase; color: var(--muted); margin-top: 16px; }
.contact-meta dd { margin: 4px 0 0; color: var(--ink); }

.legal-wrap { max-width: 760px; margin: 0 auto; }
.legal-wrap h1 { font-size: 44px; letter-spacing: -1.1px; }
.legal-wrap h2 { font-size: 24px; margin-top: 36px; }
.legal-wrap p, .legal-wrap li { color: var(--body); }

.site-footer { background: var(--canvas); border-top: 1px solid var(--hairline); padding: 64px 0 48px; margin-top: 80px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr 1fr; gap: 32px; }
.footer-col { display: flex; flex-direction: column; gap: 8px; }
.footer-head { font-size: 11px; letter-spacing: 0.88px; text-transform: uppercase; color: var(--muted); margin: 0 0 8px; font-weight: 600; }
.footer-link { font-size: 14px; color: var(--body); }
.footer-link:hover { color: var(--ink); }
.footer-note { font-size: 14px; color: var(--body); max-width: 32ch; }
.footer-bottom { border-top: 1px solid var(--hairline); margin-top: 40px; padding-top: 24px; display: flex; flex-direction: column; gap: 6px; }
.footer-bottom p { font-size: 13px; color: var(--muted); margin: 0; }

.cookie-banner {
  position: fixed;
  left: 24px;
  right: 24px;
  bottom: 24px;
  max-width: 720px;
  margin: 0 auto;
  background: var(--surface-card);
  border: 1px solid var(--hairline-strong);
  border-radius: var(--r-lg);
  padding: 20px 24px;
  display: none;
  z-index: 80;
  align-items: center;
  gap: 24px;
  justify-content: space-between;
  flex-wrap: wrap;
}
.cookie-banner.is-visible { display: flex; }
.cookie-text { font-size: 14px; color: var(--body); flex: 1; min-width: 240px; }
.cookie-text a { color: var(--ink); text-decoration: underline; }
.cookie-actions { display: flex; gap: 12px; }

@media (max-width: 1024px) {
  h1 { font-size: 56px; letter-spacing: -1.6px; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-media img { height: 340px; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
  .nav-toggle { display: block; }
  .nav-menu {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--canvas);
    border-bottom: 1px solid var(--hairline);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 8px 24px 16px;
  }
  .nav-menu.is-open { display: flex; }
  .nav-menu .nav-link { padding: 12px 0; width: 100%; }
  .nav-cta { width: auto; }
}

@media (max-width: 640px) {
  h1 { font-size: 32px; letter-spacing: -0.6px; }
  h2 { font-size: 28px; letter-spacing: -0.4px; }
  .section { padding: 48px 0; }
  .grid-3, .grid-2, .related { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .article-wrap h1 { font-size: 34px; }
}