/*
 * style-claude.css
 * Warm editorial theme based on Anthropic/Claude design language.
 * Swap href="style.css" → href="style-claude.css" in index.html to compare.
 */

/* ─── Tokens ─────────────────────────────────────────────── */
:root {
  --near-black:    #141413;
  --terracotta:    #c96442;
  --coral:         #d97757;
  --parchment:     #f5f4ed;
  --ivory:         #faf9f5;
  --white:         #ffffff;
  --warm-sand:     #e8e6dc;
  --dark-surface:  #30302e;
  --charcoal-warm: #4d4c48;
  --olive-gray:    #5e5d59;
  --stone-gray:    #87867f;
  --warm-silver:   #b0aea5;
  --border-cream:  #f0eee6;
  --border-warm:   #e8e6dc;
  --ring-warm:     #d1cfc5;

  --bg:     var(--parchment);
  --text:   var(--near-black);
  --muted:  var(--olive-gray);
  --border: var(--border-cream);
  --max:    1200px;
}

/* ─── Reset ──────────────────────────────────────────────── */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

a { color: inherit; text-decoration: none; }
p { margin: 0; }

h1, h2, h3 {
  font-family: Georgia, ui-serif, serif;
  font-weight: 500;
  margin-top: 0;
}

/* ─── Layout ─────────────────────────────────────────────── */
.container {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
}

/* ─── Navigation ─────────────────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(245, 244, 237, 0.88);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-cream);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: Georgia, ui-serif, serif;
  font-weight: 500;
  font-size: 1.05rem;
  color: var(--near-black);
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: var(--warm-sand);
  border: 1px solid var(--border-warm);
  color: var(--charcoal-warm);
  font-size: 13px;
  font-weight: 600;
  font-family: Inter, ui-sans-serif, system-ui, sans-serif;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.94rem;
  color: var(--olive-gray);
}

.nav-links a:hover { color: var(--near-black); }

/* ─── Hero ───────────────────────────────────────────────── */
.hero { padding: 72px 0 56px; }

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 24px;
  align-items: stretch;
}

/* ─── Cards ──────────────────────────────────────────────── */
.card {
  background: var(--ivory);
  border: 1px solid var(--border-cream);
  border-radius: 16px;
  box-shadow: rgba(0, 0, 0, 0.05) 0px 4px 24px;
}

/* ─── Hero copy ──────────────────────────────────────────── */
.hero-copy { padding: 40px; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  margin-bottom: 20px;
  border-radius: 999px;
  background: var(--warm-sand);
  border: 1px solid var(--border-warm);
  color: var(--charcoal-warm);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.02em;
}

h1 {
  margin: 0;
  font-size: clamp(2.8rem, 6vw, 4rem);
  line-height: 1.10;
  letter-spacing: -0.02em;
  color: var(--near-black);
}

.hero-copy .lead {
  margin: 22px 0 0;
  font-size: 1.1rem;
  color: var(--muted);
  max-width: 58ch;
  line-height: 1.6;
}

/* ─── CTA buttons ────────────────────────────────────────── */
.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 8px;
  border: 1px solid var(--border-warm);
  background: var(--warm-sand);
  color: var(--charcoal-warm);
  font-size: 0.94rem;
  font-weight: 500;
  transition: box-shadow 0.15s ease, background 0.15s ease;
  cursor: pointer;
}

.btn:hover {
  background: var(--border-warm);
  box-shadow: var(--warm-sand) 0px 0px 0px 0px, var(--ring-warm) 0px 0px 0px 1px;
}

.btn-primary {
  background: var(--terracotta);
  border-color: var(--terracotta);
  color: var(--ivory);
  box-shadow: var(--terracotta) 0px 0px 0px 0px, var(--terracotta) 0px 0px 0px 1px;
}

.btn-primary:hover {
  background: var(--coral);
  border-color: var(--coral);
  box-shadow: var(--terracotta) 0px 0px 0px 0px, var(--coral) 0px 0px 0px 1px;
}

/* ─── Hero panel ─────────────────────────────────────────── */
.hero-panel {
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 20px;
}

.mini-label {
  color: var(--stone-gray);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: 14px;
}

/* ─── Storage layers ─────────────────────────────────────── */
.storage-layers {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.layer {
  display: flex;
  flex-direction: column;
  padding: 12px 14px;
  border-radius: 8px;
  background: var(--white);
  border: 1px solid var(--border-warm);
  box-shadow: var(--white) 0px 0px 0px 0px, var(--ring-warm) 0px 0px 0px 1px;
}

.layer strong {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--near-black);
  font-family: Inter, ui-sans-serif, system-ui, sans-serif;
}

.layer span {
  font-size: 0.82rem;
  color: var(--stone-gray);
  margin-top: 2px;
}

.layer-arrow {
  font-size: 0.75rem;
  color: var(--stone-gray);
  padding-left: 14px;
  opacity: 0.55;
}

/* ─── Panel note ─────────────────────────────────────────── */
.panel-note {
  color: var(--stone-gray);
  font-size: 0.88rem;
  margin: 0;
  line-height: 1.55;
}

/* ─── Stats ──────────────────────────────────────────────── */
.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.stat {
  padding: 14px;
  border-radius: 8px;
  background: var(--warm-sand);
  border: 1px solid var(--border-warm);
}

.stat strong {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 3px;
  color: var(--near-black);
}

.stat span {
  color: var(--stone-gray);
  font-size: 0.80rem;
  line-height: 1.4;
}

/* ─── Sections ───────────────────────────────────────────── */
section { padding: 24px 0 32px; }

.section-title {
  margin: 0 0 14px;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  line-height: 1.20;
  letter-spacing: -0.01em;
  color: var(--near-black);
}

.section-intro {
  color: var(--muted);
  margin: 0 0 28px;
  font-size: 1.06rem;
  max-width: 68ch;
}

/* ─── Grids ──────────────────────────────────────────────── */
.grid-3,
.grid-2 {
  display: grid;
  gap: 16px;
}

.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

/* ─── Content cards ──────────────────────────────────────── */
.feature,
.story,
.roadmap,
.code-card {
  padding: 28px;
}

h2 { margin-top: 0; }

h3 {
  margin-bottom: 10px;
  font-size: 1.1rem;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.feature p,
.story p,
.roadmap p {
  color: var(--muted);
  font-size: 0.96rem;
}

.feature-icon {
  width: 40px;
  height: 40px;
  margin-bottom: 16px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: var(--warm-sand);
  border: 1px solid var(--border-warm);
  color: var(--charcoal-warm);
  font-weight: 700;
  font-size: 13px;
}

/* ─── Quote ──────────────────────────────────────────────── */
.quote {
  padding: 28px 32px;
  border-left: 3px solid var(--terracotta);
  background: var(--ivory);
  border-radius: 0 12px 12px 0;
  color: var(--charcoal-warm);
  font-size: 1.06rem;
  line-height: 1.65;
}

.quote strong { color: var(--near-black); }

/* ─── Code card ──────────────────────────────────────────── */
.code-card pre {
  margin: 0;
  padding: 18px;
  overflow-x: auto;
  border-radius: 8px;
  background: var(--near-black);
  border: 1px solid var(--dark-surface);
  color: var(--warm-silver);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 13px;
  line-height: 1.7;
  letter-spacing: -0.02em;
}

/* ─── Roadmap lists ──────────────────────────────────────── */
.roadmap ul {
  margin: 14px 0 0;
  padding-left: 20px;
  color: var(--muted);
  font-size: 0.96rem;
}

.roadmap li + li { margin-top: 8px; }

/* ─── Principles section — dark alternation ──────────────── */
#principles {
  background: var(--near-black);
  padding: 56px 0;
}

#principles .section-title { color: var(--ivory); }
#principles .section-intro { color: var(--warm-silver); }

#principles .card {
  background: var(--dark-surface);
  border-color: rgba(255, 255, 255, 0.08);
  box-shadow: none;
}

#principles h3 { color: var(--ivory); }
#principles .feature p { color: var(--warm-silver); }

#principles .feature-icon {
  background: rgba(201, 100, 66, 0.18);
  border-color: rgba(201, 100, 66, 0.35);
  color: var(--coral);
}

/* ─── Footer ─────────────────────────────────────────────── */
.footer {
  padding: 40px 0 56px;
  color: var(--stone-gray);
  font-size: 0.90rem;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding-top: 22px;
  border-top: 1px solid var(--border-warm);
}

.footer a:hover { color: var(--near-black); }

/* ─── Responsive ─────────────────────────────────────────── */
@media (max-width: 960px) {
  .hero-grid,
  .grid-3,
  .grid-2,
  .stats {
    grid-template-columns: 1fr;
  }

  .hero { padding-top: 44px; }

  .hero-copy,
  .hero-panel,
  .feature,
  .story,
  .roadmap,
  .code-card {
    padding: 22px;
  }

  .nav-inner,
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(var(--max), calc(100% - 24px));
  }

  .nav-links {
    flex-wrap: wrap;
    gap: 12px;
  }

  .cta-row {
    flex-direction: column;
  }

  .btn { width: 100%; }
}