: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;
  --tl-thinking: #dfa88f;
  --tl-grep: #9fc9a2;
  --tl-read: #9fbbe0;
  --tl-edit: #c0a8dd;
  --tl-done: #c08532;
}

* { 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: -0.0015em;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 1200px; 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;
  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; }
h4 { font-size: 22px; line-height: 1.3; letter-spacing: -0.11px; }

p { margin: 0 0 16px; }

code, pre, .mono {
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 13px;
}

.section { padding: 80px 0; }
.section-tight { padding: 48px 0; }

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

.lead { font-size: 18px; color: var(--body); max-width: 720px; }

/* Top nav */
.top-nav {
  background: var(--canvas);
  border-bottom: 1px solid var(--hairline);
  position: sticky;
  top: 0;
  z-index: 50;
}
.top-nav .wrap {
  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 span { color: var(--primary); }
.nav-menu { display: flex; align-items: center; gap: 24px; list-style: none; margin: 0; padding: 0; }
.nav-link { font-size: 14px; font-weight: 500; color: var(--body); }
.nav-link.active { color: var(--ink); }
.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--hairline-strong);
  border-radius: 8px;
  padding: 8px 10px;
  cursor: pointer;
  font-size: 14px;
  color: var(--ink);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 500;
  border-radius: 8px;
  padding: 10px 18px;
  height: 40px;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--primary); color: var(--on-primary); }
.btn-primary:active { background: var(--primary-active); }
.btn-secondary { background: var(--surface-card); color: var(--ink); border-color: var(--hairline-strong); }
.btn-dark { background: var(--ink); color: var(--canvas); height: 44px; padding: 12px 20px; }
.btn-text { background: none; color: var(--ink); border: none; height: auto; padding: 0; }
.btn-text:hover { text-decoration: underline; }

/* Hero */
.hero { padding: 80px 0 48px; }
.hero h1 { max-width: 14ch; }
.hero .lead { margin-bottom: 24px; }
.hero-actions { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.hero-figure {
  margin-top: 48px;
  border: 1px solid var(--hairline);
  border-radius: 12px;
  overflow: hidden;
  background: var(--surface-card);
}
.hero-figure img { width: 100%; height: 420px; object-fit: cover; display: block; }
.figure-caption { font-size: 13px; color: var(--muted); padding: 12px 16px; border-top: 1px solid var(--hairline-soft); }

/* Cards grid */
.grid { display: grid; gap: 24px; }
.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; }
.card .label { margin-bottom: 8px; }

.article-card { display: flex; flex-direction: column; overflow: hidden; padding: 0; }
.article-card img { width: 100%; height: 200px; object-fit: cover; display: block; border-bottom: 1px solid var(--hairline); }
.article-card .card-body { padding: 24px; display: flex; flex-direction: column; gap: 8px; }
.article-card h3 { font-size: 22px; margin-bottom: 4px; }
.article-card p { font-size: 16px; color: var(--body); margin: 0; }
.article-card .read { margin-top: 8px; font-size: 14px; font-weight: 500; color: var(--ink); }

/* Badges / pills */
.badge {
  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;
}

/* Article layout */
.article-hero img {
  width: 100%;
  height: 380px;
  object-fit: cover;
  display: block;
  border: 1px solid var(--hairline);
  border-radius: 12px;
}
.article-body { max-width: 760px; }
.article-body h2 { font-size: 26px; letter-spacing: -0.325px; margin-top: 40px; }
.article-body h3 { font-size: 22px; margin-top: 28px; }
.article-body ul, .article-body ol { padding-left: 22px; margin: 0 0 16px; }
.article-body li { margin-bottom: 8px; }
.meta { font-size: 14px; color: var(--muted); margin-bottom: 24px; }

.callout {
  background: var(--canvas-soft);
  border: 1px solid var(--hairline);
  border-left: 3px solid var(--tl-done);
  border-radius: 12px;
  padding: 20px 24px;
  margin: 24px 0;
}
.callout .label { color: var(--tl-done); }

.note-pane {
  background: var(--canvas-soft);
  border: 1px solid var(--hairline);
  border-radius: 8px;
  padding: 16px;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 13px;
  color: var(--body);
  margin: 24px 0;
}

.steps { counter-reset: step; list-style: none; padding: 0; }
.steps li {
  counter-increment: step;
  position: relative;
  padding-left: 44px;
  margin-bottom: 16px;
}
.steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 28px;
  height: 28px;
  border-radius: 9999px;
  background: var(--ink);
  color: var(--canvas);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
}

.spec-table { width: 100%; border-collapse: collapse; margin: 24px 0; }
.spec-table th, .spec-table td { text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--hairline); font-size: 14px; }
.spec-table th { color: var(--ink); font-weight: 600; }
.spec-table td { color: var(--body); }

.related { border-top: 1px solid var(--hairline); margin-top: 48px; padding-top: 32px; }

/* Form */
.form-grid { max-width: 560px; }
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 14px; font-weight: 600; color: var(--ink); margin-bottom: 6px; }
.field input {
  width: 100%;
  background: var(--surface-card);
  border: 1px solid var(--hairline-strong);
  border-radius: 8px;
  padding: 12px 16px;
  height: 44px;
  font-size: 16px;
  color: var(--ink);
  font-family: inherit;
}
.field input:focus { outline: none; border-color: var(--ink); }
.form-msg { display: none; margin-top: 16px; font-size: 14px; color: var(--success); font-weight: 500; }
.form-msg.show { display: block; }
.btn .spinner { display: none; }
.btn.loading .spinner {
  display: inline-block;
  width: 14px; height: 14px;
  border: 2px solid rgba(255,255,255,0.45);
  border-top-color: #fff;
  border-radius: 9999px;
  margin-right: 8px;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Contact band */
.contact-info { list-style: none; padding: 0; margin: 0; font-size: 14px; color: var(--body); }
.contact-info li { margin-bottom: 8px; }

/* Footer */
.footer { background: var(--canvas); border-top: 1px solid var(--hairline); padding: 64px 0 48px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 32px; }
.footer h4 { font-size: 13px; font-weight: 600; letter-spacing: 0.4px; color: var(--ink); margin-bottom: 12px; }
.footer ul { list-style: none; padding: 0; margin: 0; }
.footer li { margin-bottom: 8px; }
.footer-link { font-size: 14px; color: var(--body); }
.footer-bottom { border-top: 1px solid var(--hairline); margin-top: 40px; padding-top: 24px; font-size: 13px; color: var(--muted); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
.footer .disclaimer { font-size: 13px; color: var(--muted); max-width: 420px; margin-top: 8px; }

/* Cookie banner */
.cookie-banner {
  position: fixed;
  left: 24px;
  right: 24px;
  bottom: 24px;
  max-width: 1152px;
  margin: 0 auto;
  background: var(--surface-card);
  border: 1px solid var(--hairline-strong);
  border-radius: 12px;
  padding: 20px 24px;
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  z-index: 100;
}
.cookie-banner.show { display: flex; }
.cookie-banner p { margin: 0; font-size: 14px; color: var(--body); }
.cookie-actions { display: flex; gap: 12px; flex-shrink: 0; }

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

@media (max-width: 768px) {
  .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: 12px 24px;
  }
  .nav-menu.open { display: flex; }
  .nav-menu li { width: 100%; padding: 8px 0; }
  .nav-toggle { display: inline-flex; }
}

@media (max-width: 640px) {
  h1 { font-size: 32px; letter-spacing: -0.6px; }
  h2 { font-size: 28px; letter-spacing: -0.4px; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .hero-figure img { height: 240px; }
  .article-hero img { height: 220px; }
  .cookie-banner { flex-direction: column; align-items: stretch; }
  .cookie-actions { justify-content: stretch; }
  .cookie-actions .btn { flex: 1; }
}