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

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

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--canvas);
  color: var(--body);
  font-family: 'Inter', system-ui, "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  letter-spacing: -0.15px;
}

h1, h2, h3, h4 {
  color: var(--ink);
  font-weight: 400;
  letter-spacing: -0.72px;
  margin: 0 0 16px;
}

h1 { font-size: 56px; line-height: 1.1; letter-spacing: -2px; }
h2 { font-size: 36px; line-height: 1.2; }
h3 { font-size: 26px; line-height: 1.25; letter-spacing: -0.325px; }
h4 { font-size: 18px; font-weight: 600; letter-spacing: 0; }

p { margin: 0 0 16px; }

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

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

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

.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;
}

/* Nav */
.site-nav {
  background: var(--canvas);
  border-bottom: 1px solid var(--hairline);
  position: sticky;
  top: 0;
  z-index: 50;
}
.nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  height: 64px;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.wordmark { font-size: 18px; font-weight: 600; color: var(--ink); letter-spacing: -0.4px; }
.wordmark:hover { text-decoration: none; }
.wordmark .dot { color: var(--primary); }
.nav-links { display: flex; align-items: center; gap: 22px; }
.nav-links a { font-size: 14px; font-weight: 500; color: var(--ink); }
.nav-cta {
  background: var(--primary);
  color: var(--on-primary) !important;
  padding: 9px 16px;
  border-radius: 8px;
}
.nav-cta:hover { background: var(--primary-active); text-decoration: none; }
.nav-toggle {
  display: none;
  background: var(--surface-card);
  border: 1px solid var(--hairline-strong);
  color: var(--ink);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 14px;
  cursor: pointer;
}

/* Buttons */
.btn {
  display: inline-block;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  padding: 11px 18px;
  cursor: pointer;
  font-family: inherit;
}
.btn-primary { background: var(--primary); color: var(--on-primary); }
.btn-primary:hover { background: var(--primary-active); text-decoration: none; }
.btn-secondary {
  background: var(--surface-card);
  color: var(--ink);
  border: 1px solid var(--hairline-strong);
}
.btn-secondary:hover { text-decoration: none; }
.btn-ink { background: var(--ink); color: var(--canvas); padding: 12px 20px; }
.btn-ink:hover { text-decoration: none; opacity: 0.92; }

/* Hero */
.hero { padding: 80px 0 64px; border-bottom: 1px solid var(--hairline); }
.hero .label { margin-bottom: 16px; display: block; }
.hero h1 { max-width: 760px; }
.hero p.lead { font-size: 18px; color: var(--body); max-width: 620px; margin-top: 20px; }
.hero-actions { display: flex; gap: 12px; margin-top: 28px; flex-wrap: wrap; }
.hero-figure {
  margin-top: 48px;
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  overflow: hidden;
}
.hero-figure img { width: 100%; height: 360px; object-fit: cover; display: block; }
.hero-figure figcaption { font-size: 13px; color: var(--muted); padding: 12px 20px; border-top: 1px solid var(--hairline); }

/* Sections */
.section { padding: 80px 0; }
.section-head { max-width: 680px; margin-bottom: 40px; }
.section-head .label { display: block; margin-bottom: 12px; }

/* Grid cards */
.grid { display: grid; gap: 20px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 24px;
}
.card h3 { font-size: 22px; letter-spacing: -0.11px; }
.card .card-meta { font-size: 13px; color: var(--muted); }
.card p { color: var(--body); }

.article-card { display: flex; flex-direction: column; }
.article-card img {
  width: 100%; height: 180px; object-fit: cover;
  border-radius: 8px; border: 1px solid var(--hairline); margin-bottom: 16px;
}
.article-card .read { margin-top: auto; font-size: 14px; font-weight: 500; color: var(--primary); }

/* Steps / timeline */
.timeline { display: flex; flex-direction: column; gap: 16px; }
.timeline-row {
  display: flex; gap: 16px; align-items: flex-start;
  background: var(--surface-card); border: 1px solid var(--hairline);
  border-radius: 12px; padding: 20px;
}
.tl-pill {
  flex-shrink: 0;
  font-size: 11px; font-weight: 600; letter-spacing: 0.88px; text-transform: uppercase;
  color: var(--ink); border-radius: 9999px; padding: 4px 10px;
}
.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); }
.timeline-row h4 { margin-bottom: 4px; }
.timeline-row p { margin: 0; color: var(--body); }

/* Code block */
.code-block {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 20px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink);
  overflow-x: auto;
}

/* Article body */
.article-wrap { padding: 56px 0 80px; }
.article-header { max-width: 760px; margin: 0 auto 32px; }
.article-header h1 { font-size: 44px; letter-spacing: -1.4px; }
.article-header .meta { font-size: 13px; color: var(--muted); margin-top: 12px; }
.article-figure { max-width: 920px; margin: 0 auto 40px; }
.article-figure img { width: 100%; height: 380px; object-fit: cover; border-radius: 12px; border: 1px solid var(--hairline); }
.article-figure figcaption { font-size: 13px; color: var(--muted); margin-top: 10px; text-align: center; }
.article-body { max-width: 760px; margin: 0 auto; }
.article-body h2 { font-size: 28px; margin-top: 40px; }
.article-body h3 { font-size: 21px; margin-top: 28px; }
.article-body p { color: var(--body); }
.article-body ul, .article-body ol { color: var(--body); padding-left: 22px; }
.article-body li { margin-bottom: 8px; }
.callout {
  background: var(--canvas-soft);
  border: 1px solid var(--hairline);
  border-left: 3px solid var(--primary);
  border-radius: 8px;
  padding: 16px 20px;
  margin: 24px 0;
}
.callout p { margin: 0; color: var(--ink); }
.refs { border-top: 1px solid var(--hairline); margin-top: 40px; padding-top: 24px; }
.refs h4 { color: var(--ink); }
.refs li { margin-bottom: 8px; font-size: 14px; }
.article-nav { display: flex; justify-content: space-between; gap: 16px; margin-top: 48px; flex-wrap: wrap; }

/* Spec table */
.spec-table { width: 100%; border-collapse: collapse; margin: 20px 0; font-size: 15px; }
.spec-table th, .spec-table td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--hairline); }
.spec-table th { color: var(--ink); font-weight: 600; }
.spec-table td { color: var(--body); }

/* Contact form */
.contact-band { background: var(--canvas); border-top: 1px solid var(--hairline); }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.form-card {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 32px;
}
.field { margin-bottom: 18px; }
.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);
  border: 1px solid var(--hairline-strong);
  border-radius: 8px;
  padding: 12px 16px;
  font-size: 15px;
  font-family: inherit;
  color: var(--ink);
}
.field textarea { min-height: 110px; resize: vertical; }
.field input:focus, .field textarea:focus { outline: 2px solid var(--primary); outline-offset: 0; border-color: var(--primary); }
.form-status { font-size: 14px; margin-top: 8px; }
.form-status.success { color: var(--success); }
.form-status.error { color: var(--error); }
.contact-info p { color: var(--body); }
.contact-info .info-row { margin-bottom: 16px; }
.contact-info .info-row span { display: block; }
.contact-info .k { font-size: 11px; font-weight: 600; letter-spacing: 0.88px; text-transform: uppercase; color: var(--muted); }
.contact-info .v { color: var(--ink); font-size: 16px; }
.btn[disabled] { opacity: 0.6; cursor: progress; }

/* Footer */
.site-footer { background: var(--canvas); border-top: 1px solid var(--hairline); padding: 64px 0 0; }
.footer-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 0 24px;
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 32px;
}
.footer-col h4 { font-size: 13px; text-transform: uppercase; letter-spacing: 0.88px; color: var(--muted); margin-bottom: 14px; }
.footer-col a { display: block; color: var(--body); font-size: 14px; margin-bottom: 10px; }
.footer-brand p { color: var(--body); font-size: 14px; max-width: 320px; margin-top: 12px; }
.footer-note { font-size: 14px; color: var(--muted); }
.footer-base {
  max-width: var(--maxw); margin: 48px auto 0; padding: 24px; border-top: 1px solid var(--hairline);
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  font-size: 13px; color: var(--muted);
}

/* Cookie banner */
.cookie-banner {
  position: fixed; bottom: 20px; left: 20px; right: 20px; max-width: 720px; margin: 0 auto;
  background: var(--surface-card); border: 1px solid var(--hairline-strong);
  border-radius: 12px; padding: 18px 22px; z-index: 100;
  display: flex; align-items: center; justify-content: space-between; gap: 18px; flex-wrap: wrap;
}
.cookie-banner p { margin: 0; font-size: 14px; color: var(--body); flex: 1 1 320px; }
.cookie-actions { display: flex; gap: 10px; }

/* Responsive */
@media (max-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  h1 { font-size: 38px; letter-spacing: -1.2px; }
  h2 { font-size: 28px; }
  .nav-links {
    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-links.open { display: flex; }
  .nav-links a { padding: 10px 0; width: 100%; }
  .nav-cta { width: 100%; text-align: center; margin-top: 8px; }
  .nav-toggle { display: inline-block; }
  .grid-3, .grid-2, .contact-grid, .footer-inner { grid-template-columns: 1fr; }
  .article-header h1 { font-size: 32px; }
}