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

:root {
  --canvas: #f7f7f4;
  --canvas-soft: #fafaf7;
  --surface-card: #ffffff;
  --surface-strong: #e6e5e0;
  --hairline: #e6e5e0;
  --hairline-soft: #efeee8;
  --hairline-strong: #cfcdc4;
  --primary: #f54e00;
  --primary-active: #d04200;
  --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;
  --sans: 'Inter', system-ui, 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --max: 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 { color: var(--primary); }

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

.skip-link {
  position: absolute; left: -999px; top: 0; background: var(--ink);
  color: var(--canvas); padding: 8px 16px; z-index: 200; border-radius: 8px;
}
.skip-link:focus { left: 16px; top: 12px; }

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-label {
  font-size: 11px; font-weight: 600; line-height: 1.4; letter-spacing: 0.88px;
  text-transform: uppercase; color: var(--muted); margin-bottom: 12px;
}

.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 {
  color: var(--primary); font-weight: 600; font-size: 18px; letter-spacing: -0.4px;
}
.nav-menu { display: flex; align-items: center; gap: 24px; }
.nav-link { font-size: 14px; font-weight: 500; color: var(--ink); }
.nav-link-contact {
  background: var(--ink); color: var(--canvas); padding: 9px 16px; border-radius: 8px;
}
.nav-link-contact:hover { background: var(--primary); color: var(--on-primary); }
.nav-toggle {
  display: none; background: var(--surface-card); border: 1px solid var(--hairline-strong);
  color: var(--ink); font-size: 14px; font-weight: 500; padding: 8px 14px; border-radius: 8px; cursor: pointer;
}

.btn {
  display: inline-block; font-size: 14px; font-weight: 500; line-height: 1;
  border-radius: 8px; cursor: pointer; border: 1px solid transparent;
  padding: 12px 18px; text-align: center;
}
.btn-primary { background: var(--primary); color: var(--on-primary); border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-active); border-color: var(--primary-active); color: var(--on-primary); }
.btn-secondary { background: var(--surface-card); color: var(--ink); border-color: var(--hairline-strong); }
.btn-secondary:hover { color: var(--primary); }
.btn-download { background: var(--ink); color: var(--canvas); padding: 13px 20px; }
.btn-download:hover { background: var(--primary); color: var(--on-primary); }
.btn-text { color: var(--ink); padding: 12px 4px; }
.btn-text:hover { color: var(--primary); }

.hero-band { padding: 80px 0 64px; }
.hero-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 48px; align-items: center; }
.hero-copy h1 { margin-bottom: 20px; }
.hero-sub { font-size: 18px; color: var(--body); max-width: 46ch; margin-bottom: 24px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.updated { font-size: 13px; color: var(--muted); margin-top: 16px; }

.media-card {
  background: var(--surface-card); border: 1px solid var(--hairline);
  border-radius: 12px; overflow: hidden;
}
.media-card img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 4 / 3; }
.caption { font-size: 13px; color: var(--muted); padding: 12px 16px; border-top: 1px solid var(--hairline-soft); }

section { padding: 80px 0; }
.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; }

.feature-card {
  background: var(--surface-card); border: 1px solid var(--hairline);
  border-radius: 12px; padding: 24px;
}
.feature-card h3 { font-size: 18px; font-weight: 600; letter-spacing: 0; margin-bottom: 8px; }
.feature-card p { color: var(--body); margin-bottom: 0; }

.timeline { display: flex; flex-wrap: wrap; gap: 8px; margin: 24px 0; }
.pill {
  font-size: 11px; font-weight: 600; letter-spacing: 0.88px; text-transform: uppercase;
  color: var(--ink); border-radius: 9999px; 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); }

.badge {
  display: inline-block; font-size: 11px; font-weight: 600; letter-spacing: 0.88px;
  text-transform: uppercase; background: var(--surface-strong); color: var(--ink);
  border-radius: 9999px; padding: 4px 10px;
}

.code-block {
  background: var(--surface-card); border: 1px solid var(--hairline); border-radius: 12px;
  padding: 20px; font-family: var(--mono); font-size: 13px; color: var(--ink);
  line-height: 1.5; overflow-x: auto; white-space: pre;
}

.param-table {
  width: 100%; border-collapse: collapse; background: var(--surface-card);
  border: 1px solid var(--hairline); border-radius: 12px; overflow: hidden;
}
.param-table th, .param-table td { text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--hairline-soft); font-size: 14px; }
.param-table th { color: var(--ink); font-weight: 600; background: var(--canvas-soft); }
.param-table td { color: var(--body); }
.param-table tr:last-child td { border-bottom: none; }

.article-wrap { max-width: 760px; margin: 0 auto; padding: 64px 0; }
.article-wrap p { font-size: 16px; letter-spacing: 0.08px; }
.article-hero { border-radius: 12px; overflow: hidden; border: 1px solid var(--hairline); margin: 24px 0 8px; }
.article-hero img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
.article-meta { font-size: 13px; color: var(--muted); margin-bottom: 24px; }
blockquote {
  margin: 24px 0; padding: 16px 20px; border-left: 3px solid var(--primary);
  background: var(--surface-card); border-radius: 0 12px 12px 0; color: var(--ink);
}
.callout {
  background: var(--canvas-soft); border: 1px solid var(--hairline); border-radius: 12px;
  padding: 20px; margin: 24px 0;
}
.callout .section-label { color: var(--primary); }
ul.checklist { list-style: none; padding: 0; margin: 16px 0; }
ul.checklist li { padding: 8px 0 8px 24px; position: relative; color: var(--body); border-bottom: 1px solid var(--hairline-soft); }
ul.checklist li::before { content: "—"; position: absolute; left: 0; color: var(--muted); }

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

.form-card {
  background: var(--surface-card); border: 1px solid var(--hairline);
  border-radius: 12px; padding: 32px;
}
.form-row { margin-bottom: 16px; }
.form-row label { display: block; font-size: 14px; font-weight: 600; color: var(--ink); margin-bottom: 6px; }
.form-row input {
  width: 100%; height: 44px; padding: 12px 16px; border-radius: 8px;
  border: 1px solid var(--hairline-strong); background: var(--surface-card);
  color: var(--ink); font-family: var(--sans); font-size: 14px;
}
.form-row input:focus { outline: 2px solid var(--primary); outline-offset: 0; border-color: var(--primary); }
.form-msg { font-size: 14px; margin-top: 12px; min-height: 20px; }
.form-msg.success { color: var(--success); }
.form-msg.error { color: var(--error); }
.btn[disabled] { opacity: 0.6; cursor: progress; }

.cta-band { padding: 96px 0; text-align: center; }
.cta-band h2 { margin-bottom: 24px; }

.footer { background: var(--canvas); border-top: 1px solid var(--hairline); padding: 48px 0 32px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr repeat(4, 1fr); gap: 24px; }
.footer-head { 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-note { font-size: 14px; color: var(--body); max-width: 32ch; }
.footer-bottom {
  display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: space-between;
  margin-top: 32px; padding-top: 24px; border-top: 1px solid var(--hairline-soft);
  font-size: 13px; color: var(--muted);
}

.cookie-banner {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 150;
  background: var(--surface-card); border-top: 1px solid var(--hairline-strong);
}
.cookie-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 16px 24px; }
.cookie-text { font-size: 13px; color: var(--body); margin: 0; max-width: 70ch; }
.cookie-actions { display: flex; gap: 8px; flex-shrink: 0; }

@media (max-width: 1024px) {
  h1 { font-size: 56px; letter-spacing: -1.4px; }
  .hero-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .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;
    flex-direction: column; align-items: flex-start; gap: 4px;
    background: var(--canvas); border-bottom: 1px solid var(--hairline); padding: 16px 24px;
  }
  .nav-menu.open { display: flex; }
}

@media (max-width: 640px) {
  h1 { font-size: 32px; letter-spacing: -0.6px; }
  h2 { font-size: 28px; letter-spacing: -0.5px; }
  .hero-grid { grid-template-columns: 1fr; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  section, .hero-band { padding: 48px 0; }
  .cookie-inner { flex-direction: column; align-items: flex-start; }
}