/* ARP Guardian — landing styles.
 *
 * Mirrors the design system of the operator console (see frontend/DESIGN.md):
 * cream canvas, coral CTAs, dark navy product surfaces, EB Garamond display
 * + Inter body + JetBrains Mono code. Fonts loaded from Google Fonts here
 * because this is the public marketing site (not the embedded console where
 * the no-CDN rule applies).
 */

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

:root {
  --canvas:        #faf9f5;
  --surface-soft:  #f5f0e8;
  --surface-card:  #efe9de;
  --surface-strong:#e8e0d2;
  --surface-dark:  #181715;
  --surface-dark-soft: #1f1e1b;
  --ink:           #141413;
  --body:          #3d3d3a;
  --body-strong:   #252523;
  --muted:         #6c6a64;
  --muted-soft:    #8e8b82;
  --on-dark:       #faf9f5;
  --on-dark-soft:  #a09d96;
  --hairline:      #e6dfd8;
  --primary:       #cc785c;
  --primary-active:#a9583e;
  --teal:          #5db8a6;
  --success:       #5db872;
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

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

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* Typography classes (mirrors DESIGN.md tokens) */
.display-xl { font-family: 'EB Garamond', serif; font-weight: 400; font-size: 64px; line-height: 1.05; letter-spacing: -1.5px; margin: 0 0 16px; }
.display-md { font-family: 'EB Garamond', serif; font-weight: 400; font-size: 40px; line-height: 1.15; letter-spacing: -0.5px; margin: 0 0 16px; }
.title-lg   { font-family: 'Inter', sans-serif; font-weight: 500; font-size: 22px; line-height: 1.3; margin: 0 0 8px; }
.title-md   { font-family: 'Inter', sans-serif; font-weight: 500; font-size: 18px; line-height: 1.4; margin: 0 0 8px; }
.eyebrow    { font-family: 'Inter', sans-serif; font-weight: 500; font-size: 12px; line-height: 1.4; letter-spacing: 1.5px; text-transform: uppercase; color: var(--muted); }
.eyebrow.center { text-align: center; display: block; margin-bottom: 12px; }
.lead       { font-size: 18px; line-height: 1.5; color: var(--body); max-width: 540px; }
.center     { text-align: center; }
.mt-xl      { margin-top: 48px; }

/* Spike-mark glyph — pure inline SVG via background */
.spike,
.spike-light {
  display: inline-block;
  width: 18px; height: 18px;
  vertical-align: -0.18em;
  background-repeat: no-repeat;
  background-size: contain;
}
.spike       { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath fill='%23141413' d='M8 0 L9 7 L16 8 L9 9 L8 16 L7 9 L0 8 L7 7 Z'/%3E%3C/svg%3E"); }
.spike-light { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath fill='%23faf9f5' d='M8 0 L9 7 L16 8 L9 9 L8 16 L7 9 L0 8 L7 7 Z'/%3E%3C/svg%3E"); }

/* ---- nav ---- */
.topnav { background: var(--canvas); border-bottom: 1px solid var(--hairline); position: sticky; top: 0; z-index: 50; }
.nav-row { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 8px; font-family: 'Inter', sans-serif; font-weight: 500; font-size: 16px; color: var(--ink); }
.nav-links { display: flex; gap: 24px; }
.nav-links a { font-size: 14px; font-weight: 500; color: var(--muted); }
.nav-links a:hover { color: var(--ink); }

/* ---- buttons ---- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; height: 40px; padding: 0 20px; border-radius: 8px; font-family: 'Inter', sans-serif; font-size: 14px; font-weight: 500; cursor: pointer; border: 1px solid transparent; transition: background 0.15s, color 0.15s, border-color 0.15s; }
.btn-primary   { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-active); color: #fff; }
.btn-secondary { background: var(--canvas); color: var(--ink); border-color: var(--hairline); }
.btn-secondary:hover { border-color: var(--muted-soft); background: var(--surface-soft); }
.btn-cream     { background: var(--canvas); color: var(--ink); }

/* ---- hero ---- */
.hero { padding: 96px 0; }
.hero-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.hero-copy .eyebrow { margin-bottom: 16px; }
.hero-cta { display: flex; gap: 12px; margin: 24px 0 32px; }
.hero-meta { display: flex; flex-direction: column; gap: 6px; font-size: 14px; color: var(--muted); }
.hero-meta strong { color: var(--body-strong); font-weight: 500; }
.hero-meta em     { font-style: normal; color: var(--muted-soft); font-size: 12px; }

/* code window mock-up — dark navy card from DESIGN.md product-mockup-card-dark */
.code-window {
  background: var(--surface-dark);
  color: var(--on-dark);
  border-radius: 12px;
  padding: 28px;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 13px;
  line-height: 1.6;
  overflow-x: auto;
  margin: 0;
  white-space: pre;
}
.c-comment { color: var(--on-dark-soft); }
.c-coral   { color: var(--primary); font-weight: 500; }
.c-ok      { color: var(--success); }

/* ---- sections ---- */
.section { padding: 96px 0; }
.section-soft { background: var(--surface-soft); }
.section h2.display-md { max-width: 760px; margin-left: auto; margin-right: auto; }

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

/* ---- feature cards ---- */
.feature-card {
  background: var(--surface-card);
  border-radius: 12px;
  padding: 32px;
}
.feature-card .icon {
  width: 40px; height: 40px;
  background: var(--canvas); border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-family: 'EB Garamond', serif; font-size: 24px; color: var(--primary);
  margin-bottom: 16px;
}
.feature-card p { margin: 8px 0 0; color: var(--body); font-size: 15px; }

/* card-feature variant used in Download — cream card with hairline */
.card-feature {
  background: var(--surface-card);
  border-radius: 12px;
  padding: 32px;
}
.card-feature p { color: var(--body); font-size: 15px; }
.code-block {
  background: var(--surface-dark);
  color: var(--on-dark);
  border-radius: 8px;
  padding: 16px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12.5px;
  line-height: 1.6;
  margin: 16px 0;
  white-space: pre;
  overflow-x: auto;
}

.text-link { color: var(--primary); font-weight: 500; }
.text-link:hover { color: var(--primary-active); text-decoration: underline; }

/* doc card */
.doc-card { display: block; padding: 24px; background: var(--canvas); border: 1px solid var(--hairline); border-radius: 12px; transition: border-color 0.15s; }
.doc-card:hover { border-color: var(--primary); color: var(--ink); }
.doc-card h3 { color: var(--ink); }
.doc-card p { color: var(--muted); font-size: 14px; margin: 0; }

/* diagram */
.diagram {
  background: var(--surface-dark);
  color: var(--on-dark);
  border-radius: 12px;
  padding: 32px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  line-height: 1.7;
  overflow-x: auto;
  margin: 48px auto 0;
  max-width: 920px;
}

/* CTA band */
.cta { padding: 0 0 96px; }
.cta-card { background: var(--primary); color: #fff; border-radius: 16px; padding: 64px; text-align: center; }
.cta-card h2.display-md { color: #fff; max-width: 700px; margin: 0 auto 12px; }
.cta-card p { color: rgba(255,255,255,0.85); max-width: 520px; margin: 0 auto 32px; font-size: 16px; }

/* footer */
.footer { background: var(--surface-dark); color: var(--on-dark-soft); padding: 64px 0 32px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 48px; }
.footer p { color: var(--on-dark-soft); font-size: 14px; margin-top: 12px; max-width: 280px; }
.brand-dark { color: var(--on-dark); font-weight: 500; display: inline-flex; align-items: center; gap: 8px; }
.footer-h { color: var(--on-dark); font-weight: 500; font-size: 14px; margin-bottom: 12px; }
.footer a { display: block; color: var(--on-dark-soft); font-size: 14px; margin-bottom: 8px; }
.footer a:hover { color: var(--on-dark); }
.copyright { font-size: 12px; color: var(--on-dark-soft); border-top: 1px solid var(--surface-dark-soft); padding-top: 24px; }

/* ---- responsive ---- */
@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .display-xl { font-size: 44px; letter-spacing: -1px; }
  .display-md { font-size: 30px; }
  .section { padding: 64px 0; }
  .hero { padding: 64px 0 48px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}

/* ─── Article pages ─────────────────────────────────────────────────────── */
.article-shell { padding: 96px 0; }
.article-shell .meta { display: flex; gap: 16px; align-items: center; margin-bottom: 16px; font-size: 14px; color: var(--muted); }
.article-shell .meta a { color: var(--primary); }
.article-shell article { max-width: 760px; margin: 0 auto; }
.article-shell h1 { font-family: 'EB Garamond', serif; font-weight: 400; font-size: 48px; line-height: 1.1; letter-spacing: -1px; margin: 0 0 16px; }
.article-shell .lede { font-size: 20px; line-height: 1.5; color: var(--body); margin: 0 0 48px; }
.article-shell h2 { font-family: 'EB Garamond', serif; font-weight: 400; font-size: 30px; line-height: 1.2; margin: 48px 0 16px; letter-spacing: -0.5px; }
.article-shell h3 { font-family: 'Inter', sans-serif; font-weight: 500; font-size: 20px; margin: 32px 0 12px; }
.article-shell p, .article-shell ul, .article-shell ol { font-size: 17px; line-height: 1.7; color: var(--body); margin: 16px 0; }
.article-shell li { margin-bottom: 8px; }
.article-shell strong { color: var(--ink); font-weight: 500; }
.article-shell pre { margin: 24px 0; }
.article-shell code:not(pre code) { background: var(--surface-card); padding: 1px 6px; border-radius: 4px; font-family: 'JetBrains Mono', monospace; font-size: 14px; color: var(--ink); }
.article-shell table { width: 100%; border-collapse: collapse; margin: 24px 0; font-size: 15px; }
.article-shell th, .article-shell td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--hairline); }
.article-shell th { color: var(--muted); font-weight: 500; font-size: 13px; text-transform: uppercase; letter-spacing: 0.5px; }
.article-shell blockquote { border-left: 3px solid var(--primary); margin: 24px 0; padding: 8px 0 8px 20px; color: var(--body-strong); font-style: italic; }
.article-shell .callout { background: var(--surface-card); border-radius: 12px; padding: 20px 24px; margin: 24px 0; }
.article-shell .callout strong { display: block; margin-bottom: 6px; color: var(--ink); }

.article-toc { margin-bottom: 48px; padding: 24px; background: var(--surface-card); border-radius: 12px; }
.article-toc-h { font-size: 12px; text-transform: uppercase; letter-spacing: 1.5px; color: var(--muted); margin-bottom: 12px; font-weight: 500; }
.article-toc ol { list-style: decimal inside; margin: 0; padding: 0; font-size: 15px; }
.article-toc li { padding: 4px 0; }
.article-toc a { color: var(--ink); }
.article-toc a:hover { color: var(--primary); }

.article-nav { display: flex; justify-content: space-between; margin-top: 64px; padding-top: 32px; border-top: 1px solid var(--hairline); gap: 24px; }
.article-nav a { padding: 16px 20px; background: var(--surface-card); border-radius: 12px; flex: 1; max-width: 320px; }
.article-nav .label { display: block; font-size: 12px; text-transform: uppercase; letter-spacing: 1.5px; color: var(--muted); margin-bottom: 4px; }
.article-nav .title { color: var(--ink); font-weight: 500; }
.article-nav .next { text-align: right; }

/* Articles index */
.articles-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-top: 48px; }
.articles-grid a { display: block; padding: 24px; background: var(--surface-card); border-radius: 12px; }
.articles-grid a:hover { background: var(--surface-strong); color: inherit; }
.articles-grid .article-no { font-size: 12px; text-transform: uppercase; letter-spacing: 1.5px; color: var(--muted); margin-bottom: 8px; }
.articles-grid h3 { font-family: 'EB Garamond', serif; font-weight: 400; font-size: 24px; line-height: 1.2; margin: 0 0 8px; color: var(--ink); }
.articles-grid p { color: var(--body); font-size: 15px; margin: 0; }

@media (max-width: 960px) {
  .articles-grid { grid-template-columns: 1fr; }
  .article-shell h1 { font-size: 36px; }
  .article-nav { flex-direction: column; }
}