/* ─────────────────────────────────────────────────────────────────────
   LUPID.AI — Shared styles for content pages (about, security,
   quickstart, privacy, terms). The hero pages (/, /blog/, /contact/)
   each have their own CSS; this file is the common chassis for the
   simpler informational pages.
   ───────────────────────────────────────────────────────────────────── */

:root {
  --obsidian:  #0B0C0E;
  --obsidian-2: #0E1013;
  --bone:      #E7E4DC;
  --bone-2:    #BFBDB4;
  --bone-3:    #7F7E77;
  --ember:     #D4A574;
  --signal:    #C9DFE4;
  --rule:      rgba(231, 228, 220, 0.08);
  --rule-2:    rgba(231, 228, 220, 0.14);
  --rule-3:    rgba(231, 228, 220, 0.22);
  --font-sans:  'Geist', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-mono:  'Geist Mono', ui-monospace, Menlo, Consolas, monospace;
  --font-serif: 'Newsreader', 'Iowan Old Style', Georgia, serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--obsidian);
  color: var(--bone);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
  background-image:
    radial-gradient(ellipse 70% 50% at 80% 0%, rgba(212, 165, 116, 0.05) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 0% 100%, rgba(201, 223, 228, 0.03) 0%, transparent 60%);
  background-attachment: fixed;
}
::selection { background: rgba(212, 165, 116, 0.25); color: var(--bone); }

a { color: var(--bone); text-decoration: none; }
a:focus-visible { outline: 2px solid var(--ember); outline-offset: 3px; border-radius: 2px; }

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 32px; }
.wrap-narrow { max-width: 760px; margin: 0 auto; padding: 0 32px; }

/* ── nav ─────────────────────────────────────────────────────────── */
nav.site-nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11, 12, 14, 0.86);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--rule);
}
.nav-in {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 0; gap: 32px;
}
.mark-lock { display: flex; align-items: center; gap: 12px; color: var(--bone); }
.mark-lock svg { width: 22px; height: 22px; color: var(--bone); }
.mark-lock .wd { font-size: 14px; letter-spacing: 0.3em; text-transform: uppercase; font-weight: 500; color: var(--bone); }
.mark-lock .meta { font-family: var(--font-mono); font-size: 10px; color: var(--bone-3); letter-spacing: 0.12em; padding-left: 12px; border-left: 1px solid var(--rule-2); }
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a { color: var(--bone-2); font-size: 13px; letter-spacing: 0.01em; transition: color 180ms; font-weight: 400; }
.nav-links a:hover, .nav-links a.active { color: var(--bone); }
.nav-links a.active { color: var(--ember); }
.nav-right .btn { display: inline-flex; align-items: center; gap: 8px; padding: 10px 18px; border: 1px solid var(--ember); color: var(--ember); font-family: var(--font-sans); font-size: 13px; letter-spacing: 0.01em; transition: background 200ms, color 200ms; }
.nav-right .btn:hover { background: var(--ember); color: var(--obsidian); }
.nav-right .btn .arr { font-family: var(--font-mono); transition: transform 200ms; }
.nav-right .btn:hover .arr { transform: translateX(3px); }
@media (max-width: 880px) {
  .nav-links { display: none; }
  .mark-lock .meta { display: none; }
}

/* ── page header ─────────────────────────────────────────────────── */
.page-header { padding: 96px 0 56px; border-bottom: 1px solid var(--rule); }
.chapter { display: flex; align-items: baseline; gap: 16px; font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.12em; color: var(--bone-3); text-transform: uppercase; margin-bottom: 28px; }
.chapter .num { color: var(--ember); }
.page-header h1 {
  font-family: var(--font-serif); font-weight: 300; font-optical-sizing: auto;
  font-size: clamp(2.4rem, 5vw, 4rem); line-height: 1.05; letter-spacing: -0.02em;
  color: var(--bone); max-width: 920px; margin: 0 0 24px;
}
.page-header h1 em { font-style: italic; color: var(--ember); }
.page-header .lede {
  font-family: var(--font-serif); font-weight: 300;
  font-size: clamp(1.05rem, 1.5vw, 1.25rem); line-height: 1.55;
  color: var(--bone-2); max-width: 720px; margin-top: 24px;
}

/* ── article body ────────────────────────────────────────────────── */
article.page-body { padding: 64px 0 96px; }
article.page-body section { margin-bottom: 72px; scroll-margin-top: 100px; }
article.page-body section:last-child { margin-bottom: 0; }
article.page-body h2 {
  font-family: var(--font-serif); font-weight: 300; font-optical-sizing: auto;
  font-size: clamp(1.6rem, 2.6vw, 2.1rem); line-height: 1.15; letter-spacing: -0.01em;
  color: var(--bone); margin: 0 0 20px; padding-top: 8px;
}
article.page-body h2 em { font-style: italic; color: var(--ember); }
article.page-body h3 {
  font-family: var(--font-sans); font-weight: 500;
  font-size: 1rem; letter-spacing: 0.02em;
  color: var(--bone); margin: 32px 0 12px;
}
article.page-body p { font-family: var(--font-serif); font-size: 17px; line-height: 1.7; color: var(--bone-2); margin-bottom: 18px; max-width: 760px; }
article.page-body p strong, article.page-body p b { color: var(--bone); font-weight: 400; }
article.page-body p em { font-style: italic; color: var(--ember); }
article.page-body p a, article.page-body li a { color: var(--ember); border-bottom: 1px solid rgba(212, 165, 116, 0.3); transition: border-color 200ms; }
article.page-body p a:hover, article.page-body li a:hover { border-bottom-color: var(--ember); }
article.page-body ul, article.page-body ol { margin: 0 0 24px 24px; max-width: 760px; }
article.page-body li { font-family: var(--font-serif); font-size: 17px; line-height: 1.65; color: var(--bone-2); margin-bottom: 8px; }
article.page-body code, article.page-body kbd { font-family: var(--font-mono); font-size: 0.92em; color: var(--ember); background: rgba(212, 165, 116, 0.08); padding: 1px 6px; border-radius: 2px; }
article.page-body pre {
  font-family: var(--font-mono); font-size: 13px; line-height: 1.6;
  color: var(--bone); background: var(--obsidian-2); border: 1px solid var(--rule-2);
  padding: 20px 24px; margin: 24px 0; overflow-x: auto; border-left: 2px solid var(--ember);
  max-width: 760px;
}
article.page-body pre code { color: inherit; background: transparent; padding: 0; }
article.page-body pre .cmt { color: var(--bone-3); font-style: italic; }
article.page-body pre .key { color: var(--signal); }
article.page-body hr { border: none; border-top: 1px solid var(--rule); margin: 56px 0; max-width: 760px; }

/* ── card grids (used in /about/ principles, /security/ posture) ── */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; margin: 32px 0 0; max-width: 1080px; }
.card { padding: 28px 28px 32px; border: 1px solid var(--rule-2); background: rgba(231, 228, 220, 0.012); transition: border-color 220ms, background 220ms; }
.card:hover { border-color: var(--rule-3); background: rgba(231, 228, 220, 0.022); }
.card .label { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.18em; color: var(--bone-3); text-transform: uppercase; }
.card .label .num { color: var(--ember); }
.card h3 { font-family: var(--font-serif); font-weight: 300; font-optical-sizing: auto; font-size: 22px; line-height: 1.25; color: var(--bone); margin: 12px 0 12px; }
.card h3 em { font-style: italic; color: var(--ember); }
.card p { font-family: var(--font-serif); font-size: 15px; line-height: 1.6; color: var(--bone-2); margin: 0; max-width: none; }

/* ── inline CTA strip ────────────────────────────────────────────── */
.cta-strip {
  display: flex; align-items: center; justify-content: space-between;
  padding: 32px 36px; border: 1px solid var(--rule-2); background: var(--obsidian-2);
  margin-top: 48px; max-width: 1080px; gap: 24px; flex-wrap: wrap;
}
.cta-strip .left h3 { font-family: var(--font-serif); font-weight: 300; font-size: 1.4rem; color: var(--bone); margin-bottom: 6px; font-optical-sizing: auto; }
.cta-strip .left p { font-family: var(--font-serif); font-size: 15px; color: var(--bone-2); margin: 0; max-width: none; }
.cta-strip .actions { display: flex; gap: 12px; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 22px; font-family: var(--font-sans); font-size: 13px; letter-spacing: 0.01em; transition: background 200ms, color 200ms, border-color 200ms; border: 1px solid var(--rule-3); color: var(--bone); }
.btn:hover { border-color: var(--bone); }
.btn.primary { border-color: var(--ember); color: var(--ember); }
.btn.primary:hover { background: var(--ember); color: var(--obsidian); }
.btn .arr { font-family: var(--font-mono); transition: transform 200ms; }
.btn:hover .arr { transform: translateX(3px); }

/* ── footer social icons (LinkedIn / GitHub) ─────────────────────── */
.foot-social {
  display: flex; gap: 10px; margin-top: 22px;
}
.foot-social a {
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px;
  border: 1px solid var(--rule-2);
  color: var(--bone-2);
  transition: border-color 220ms ease, color 220ms ease, background 220ms ease, transform 220ms ease;
}
.foot-social a:hover {
  border-color: var(--ember);
  color: var(--ember);
  background: rgba(212, 165, 116, 0.05);
  transform: translateY(-1px);
}
.foot-social a:focus-visible {
  outline: 2px solid var(--ember); outline-offset: 3px;
}
.foot-social svg { width: 15px; height: 15px; }
@media (prefers-reduced-motion: reduce) {
  .foot-social a { transition: none; }
  .foot-social a:hover { transform: none; }
}

/* ── footer ──────────────────────────────────────────────────────── */
footer.site-footer { padding: 64px 0 32px; border-top: 1px solid var(--rule); margin-top: 96px; }
.foot-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 48px; padding-bottom: 48px; border-bottom: 1px solid var(--rule); }
.foot-brand svg { width: 28px; height: 28px; color: var(--bone); }
.foot-brand .wd { font-size: 14px; letter-spacing: 0.3em; text-transform: uppercase; font-weight: 500; color: var(--bone); margin: 12px 0 16px; }
.foot-brand p { font-size: 14px; line-height: 1.6; color: var(--bone-2); max-width: 460px; }
.foot-links { display: flex; flex-direction: column; gap: 14px; align-items: flex-start; }
.foot-links a { color: var(--bone-2); font-size: 14px; transition: color 180ms; }
.foot-links a:hover { color: var(--ember); }
.foot-bar { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px; padding-top: 28px; font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.18em; color: var(--bone-3); text-transform: uppercase; }
.foot-bar a { color: var(--bone-3); transition: color 180ms; }
.foot-bar a:hover { color: var(--ember); }
@media (max-width: 720px) {
  .foot-grid { grid-template-columns: 1fr; gap: 32px; }
  .foot-bar { flex-direction: column; align-items: flex-start; }
}

/* ── breadcrumb / TOC sidebar (optional, used by Privacy/Terms) ──── */
.breadcrumb { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.12em; color: var(--bone-3); text-transform: uppercase; margin-bottom: 20px; }
.breadcrumb a { color: var(--bone-3); transition: color 180ms; }
.breadcrumb a:hover { color: var(--ember); }
.breadcrumb .sep { padding: 0 8px; color: var(--rule-3); }

/* ── reduced motion ──────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}