@import url('https://fonts.googleapis.com/css2?family=Crimson+Pro:ital,wght@0,300;0,400;0,600;1,400&family=Inter:wght@400;500;600;700&family=IBM+Plex+Sans:wght@400;500;600;700&display=swap');

/* ── Design System ─────────────────────────────────────────────────────────── */
:root {
  --ink:        #0f172a;
  --ink-muted:  #64748b;
  --ink-light:  #94a3b8;
  --bg:         #ffffff;
  --bg-soft:    #f8fafc;
  --bg-dark:    #0f172a;
  --accent:     #2563eb;
  --accent-bg:  #dbeafe;
  --border:     #e2e8f0;
  --border-dark:#cbd5e1;
  --radius:     8px;
  --font:       -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', sans-serif;
  --max-w:      1120px;
  --nav-h:      64px;
}

/* ── Reset ──────────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: 'IBM Plex Sans', sans-serif; font-size: 1.0625rem; font-weight: 400; line-height: 1.6; color: #334155; background: var(--bg); -webkit-font-smoothing: antialiased; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; font: inherit; border: none; background: none; }

/* ── Typography ─────────────────────────────────────────────────────────────── */
h1 { font-family: 'Crimson Pro', serif; font-size: clamp(1.75rem, 4.4vw, 3.3rem); font-weight: 400; line-height: 1.2; letter-spacing: -0.015em; color: #1a1a1a; }
h2 { font-family: 'Crimson Pro', serif; font-size: clamp(1.4rem, 3.5vw, 2.6rem); font-weight: 600; line-height: 1.25; letter-spacing: -0.01em; margin-top: 2.5rem; color: #1a1a1a; }
h3 { font-family: 'Crimson Pro', serif; font-size: clamp(1.2rem, 2.8vw, 2rem); font-weight: 600; line-height: 1.3; letter-spacing: 0; margin-top: 2rem; color: #2d2d2d; }
h4 { font-size: 0.9rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink-muted); }
p  { color: var(--ink-muted); font-size: 1rem; line-height: 1.75; }

em { font-style: italic; color: var(--ink); }
h1 em { color: var(--accent); }

/* ── Layout ─────────────────────────────────────────────────────────────────── */
.wrap        { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
.section     { padding: 96px 0; }
.section-sm  { padding: 64px 0; }
.section-dark { background: var(--bg-dark); color: #fff; }
.section-dark p, .section-dark h4 { color: #94a3b8; }
.section-soft { background: var(--bg-soft); }

/* ── Section Labels ─────────────────────────────────────────────────────────── */
.label {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 20px;
}
.label-accent { color: var(--accent); }

/* ── Buttons ────────────────────────────────────────────────────────────────── */
.btn-primary {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--accent); color: #fff;
  padding: 12px 24px; border-radius: var(--radius);
  font-size: 0.9rem; font-weight: 600;
  transition: background 0.2s, transform 0.15s;
  white-space: nowrap;
}
.btn-primary:hover { background: #1d4ed8; transform: translateY(-1px); }

.btn-ghost {
  display: inline-flex; align-items: center; gap: 6px;
  border: 1.5px solid var(--border-dark); color: var(--ink);
  padding: 11px 23px; border-radius: var(--radius);
  font-size: 0.9rem; font-weight: 600;
  transition: border-color 0.2s, background 0.2s;
  white-space: nowrap;
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-bg); }

.btn-group { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }

/* ── Navigation ─────────────────────────────────────────────────────────────── */
.site-nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  height: var(--nav-h);
}
.nav-inner {
  display: flex; align-items: center; gap: 40px;
  max-width: var(--max-w); margin: 0 auto; padding: 0 24px;
  height: 100%;
}
.nav-logo {
  font-size: 1rem; font-weight: 800; letter-spacing: -0.02em;
  color: var(--ink); white-space: nowrap; flex-shrink: 0;
}
.nav-logo span { color: var(--accent); }
.nav-links { display: flex; gap: 32px; flex: 1; }
.nav-links a {
  font-size: 0.875rem; font-weight: 500; color: var(--ink-muted);
  transition: color 0.15s;
}
.nav-links a:hover, .nav-links a.active { color: var(--ink); }
.nav-ctas { display: flex; gap: 10px; margin-left: auto; flex-shrink: 0; }
.nav-ctas .btn-primary { padding: 9px 18px; font-size: 0.825rem; }
.nav-ctas .btn-ghost   { padding: 8px 17px; font-size: 0.825rem; }
.nav-burger { display: none; font-size: 1.25rem; color: var(--ink); padding: 8px; }

/* ── Hero ───────────────────────────────────────────────────────────────────── */
.hero { padding: 100px 0 80px; }
.hero-inner { max-width: 820px; }
.hero h1 { margin-bottom: 24px; }
.hero p.hero-sub {
  font-size: 1.125rem; color: var(--ink-muted);
  max-width: 620px; margin-bottom: 36px; line-height: 1.75;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 0.75rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 24px;
}
.hero-badge::before { content: '·'; font-size: 1.25rem; }

/* ── Disciplines Grid ───────────────────────────────────────────────────────── */
.disciplines-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-top: 48px;
}
.discipline-card {
  background: var(--bg);
  padding: 28px 28px 24px;
  transition: background 0.15s;
}
.discipline-card:hover { background: var(--bg-soft); }
.discipline-id {
  font-size: 0.7rem; font-weight: 700; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--accent); margin-bottom: 10px;
}
.discipline-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; color: var(--ink); }
.discipline-card p { font-size: 0.875rem; line-height: 1.6; }

/* ── Stages ─────────────────────────────────────────────────────────────────── */
.stages-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius);
  overflow: hidden;
  margin-top: 48px;
}
.stage-card {
  padding: 32px 28px;
}
.stage-num {
  font-size: 0.65rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase;
  color: #475569; margin-bottom: 12px;
}
.stage-card h3 { font-size: 1.125rem; font-weight: 700; color: #ffffff; margin-bottom: 10px; }
.stage-card p  { font-size: 0.875rem; color: #94a3b8; line-height: 1.65; }

/* ── Metrics Bar ────────────────────────────────────────────────────────────── */
.metrics-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.metric-item {
  padding: 36px 28px;
  text-align: center;
}
.metric-num {
  font-size: 2.25rem; font-weight: 800; letter-spacing: -0.03em;
  color: var(--ink); display: block; margin-bottom: 4px;
}
.metric-label { font-size: 0.8rem; color: var(--ink-muted); line-height: 1.5; }
.metric-source { font-size: 0.7rem; color: var(--ink-light); margin-top: 4px; }

/* ── Principles ─────────────────────────────────────────────────────────────── */
.principles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 32px;
  margin-top: 48px;
}
.principle-item { padding: 0; }
.principle-id {
  font-size: 0.65rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 10px; display: block;
}
.principle-item h3 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
.principle-item p  { font-size: 0.875rem; line-height: 1.7; }

/* ── Tools Library ──────────────────────────────────────────────────────────── */
.tools-category { margin-bottom: 64px; }
.tools-category-header { margin-bottom: 28px; padding-bottom: 20px; border-bottom: 1px solid var(--border); }
.tools-category-id {
  font-size: 0.7rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 6px; display: block;
}
.tools-category-header h2 { font-size: 1.25rem; font-weight: 700; margin-bottom: 4px; }
.tools-category-header p  { font-size: 0.875rem; }
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.tool-card {
  background: var(--bg); padding: 28px;
  display: flex; flex-direction: column; gap: 12px;
  transition: background 0.15s;
}
.tool-card:hover { background: var(--bg-soft); }
.tool-card-meta {
  display: flex; gap: 8px; align-items: center;
  font-size: 0.7rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase;
}
.tool-card-id    { color: var(--accent); }
.tool-card-type  { color: var(--ink-light); }
.tool-card h3    { font-size: 1rem; font-weight: 700; color: var(--ink); }
.tool-card p     { font-size: 0.875rem; line-height: 1.6; flex: 1; }
.tool-card-cta {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 0.825rem; font-weight: 600; color: var(--accent);
  transition: gap 0.15s;
}
.tool-card:hover .tool-card-cta { gap: 8px; }

/* ── Individual Tool Page ───────────────────────────────────────────────────── */
.breadcrumb {
  font-size: 0.8rem; color: var(--ink-muted);
  display: flex; gap: 8px; align-items: center;
  margin-bottom: 40px;
}
.breadcrumb a { color: var(--ink-muted); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb-sep { color: var(--ink-light); }
.tool-meta-strip {
  display: flex; flex-wrap: wrap; gap: 24px;
  padding: 16px 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
  margin-bottom: 48px;
}
.tool-meta-item { }
.tool-meta-key { font-size: 0.65rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-light); display: block; margin-bottom: 2px; }
.tool-meta-val { font-size: 0.825rem; font-weight: 600; color: var(--ink); }

.tool-open-cta {
  background: var(--bg-soft); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 40px;
  text-align: center; margin: 48px 0;
}
.tool-open-cta h2 { margin-bottom: 12px; }
.tool-open-cta p  { max-width: 480px; margin: 0 auto 24px; }

.rules-list { margin-top: 32px; display: flex; flex-direction: column; gap: 28px; }
.rule-item { display: flex; gap: 20px; }
.rule-num {
  font-size: 0.65rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--ink-light); white-space: nowrap; padding-top: 2px; min-width: 36px;
}
.rule-body h4 { font-size: 0.9rem; font-weight: 700; color: var(--ink); margin-bottom: 6px; text-transform: none; letter-spacing: 0; }
.rule-body p  { font-size: 0.875rem; }

.benchmarks-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 1px; background: var(--border);
  border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden;
  margin-top: 28px;
}
.benchmark-item { padding: 24px; background: var(--bg-soft); }
.benchmark-num { font-size: 1.75rem; font-weight: 800; color: var(--ink); display: block; margin-bottom: 4px; }
.benchmark-label { font-size: 0.8rem; color: var(--ink-muted); line-height: 1.5; }
.benchmark-source { font-size: 0.7rem; color: var(--ink-light); margin-top: 4px; }

/* ── Blog ───────────────────────────────────────────────────────────────────── */
.blog-header { padding: 80px 0 48px; border-bottom: 1px solid var(--border); margin-bottom: 48px; }
.blog-header h1 { margin-bottom: 12px; }
.blog-header p  { font-size: 1rem; max-width: 560px; }
.blog-grid { display: flex; flex-direction: column; gap: 0; }
.blog-card {
  padding: 36px 0; border-bottom: 1px solid var(--border);
  display: grid; grid-template-columns: 1fr auto; gap: 24px; align-items: start;
}
.blog-card-body { }
.blog-card-cat {
  font-size: 0.7rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 8px; display: block;
}
.blog-card-date { color: var(--ink-light); font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 10px; display: block; }
.blog-card h2 { font-size: 1.25rem; font-weight: 700; margin-bottom: 10px; transition: color 0.15s; }
.blog-card:hover h2 { color: var(--accent); }
.blog-card p  { font-size: 0.9rem; line-height: 1.7; }
.blog-card-cta {
  display: flex; flex-direction: column; align-items: flex-end; gap: 8px; padding-top: 4px;
}
.blog-card-link {
  font-size: 0.825rem; font-weight: 600; color: var(--accent);
  display: inline-flex; align-items: center; gap: 4px; white-space: nowrap;
}
.blog-card-read { font-size: 0.75rem; color: var(--ink-light); white-space: nowrap; }

/* ── Blog Post ──────────────────────────────────────────────────────────────── */
.post-header { padding: 80px 0 48px; border-bottom: 1px solid var(--border); margin-bottom: 56px; max-width: 740px; }
.post-header h1 { margin-bottom: 20px; }
.post-meta { display: flex; gap: 20px; flex-wrap: wrap; align-items: center; }
.post-meta-cat { font-size: 0.7rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); }
.post-meta-date { font-size: 0.75rem; color: var(--ink-light); font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; }
.post-meta-read { font-size: 0.75rem; color: var(--ink-light); }
.post-body { max-width: 700px; }
.post-body h2 { font-size: 1.375rem; margin: 48px 0 16px; color: var(--ink); }
.post-body h3 { font-size: 1.1rem; margin: 32px 0 12px; color: var(--ink); }
.post-body p  { font-size: 1rem; line-height: 1.8; margin-bottom: 20px; }
.post-body blockquote {
  border-left: 3px solid var(--accent); padding: 4px 0 4px 20px;
  margin: 28px 0; color: var(--ink);
}
.post-body blockquote p { font-size: 1.05rem; font-style: italic; margin: 0; color: var(--ink); }
.post-callout {
  background: var(--bg-soft); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px 28px; margin: 32px 0;
}
.post-callout p { margin: 0; }
.post-cta {
  background: var(--bg-soft); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 36px; margin-top: 64px;
}
.post-cta h3 { margin-bottom: 8px; }
.post-cta p  { margin-bottom: 20px; }

/* ── FAQ ────────────────────────────────────────────────────────────────────── */
.faq-list { margin-top: 40px; }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-q {
  width: 100%; text-align: left; padding: 24px 0;
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
  font-size: 1rem; font-weight: 600; color: var(--ink);
  cursor: pointer;
}
.faq-icon { font-size: 1.25rem; color: var(--ink-muted); transition: transform 0.2s; flex-shrink: 0; }
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-a { display: none; padding-bottom: 24px; }
.faq-a p { font-size: 0.9rem; line-height: 1.75; }
.faq-item.open .faq-a { display: block; }

/* ── Footer CTA ─────────────────────────────────────────────────────────────── */
.footer-cta {
  background: var(--bg-soft); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
  padding: 80px 0; text-align: center;
}
.footer-cta h2 { margin-bottom: 12px; max-width: 520px; margin-left: auto; margin-right: auto; }
.footer-cta p  { max-width: 480px; margin: 0 auto 28px; }

/* ── Footer ─────────────────────────────────────────────────────────────────── */
.site-footer { background: var(--bg-dark); padding: 64px 0 32px; }
.footer-cols { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 48px; }
.footer-brand p { font-size: 0.85rem; color: #64748b; line-height: 1.75; margin-top: 12px; }
.footer-col h4 { font-size: 0.65rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: #475569; margin-bottom: 16px; }
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col li a { font-size: 0.85rem; color: #64748b; transition: color 0.15s; }
.footer-col li a:hover { color: #fff; }
.footer-logo { font-size: 1rem; font-weight: 800; color: #fff; letter-spacing: -0.02em; }
.footer-logo span { color: var(--accent); }
.footer-legal {
  border-top: 1px solid #1e293b; padding-top: 28px;
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px;
}
.footer-legal-copy { font-size: 0.8rem; color: #475569; }
.footer-legal-links { display: flex; gap: 20px; }
.footer-legal-links a { font-size: 0.8rem; color: #475569; transition: color 0.15s; }
.footer-legal-links a:hover { color: #94a3b8; }

/* ── Cookie Banner ──────────────────────────────────────────────────────────── */
.cookie-banner {
  position: fixed; bottom: 20px; left: 20px; right: 20px; max-width: 480px;
  background: var(--ink); color: #fff;
  border-radius: var(--radius); padding: 20px 24px;
  display: flex; gap: 16px; align-items: flex-start;
  box-shadow: 0 8px 32px rgba(0,0,0,0.2);
  z-index: 1000; transition: opacity 0.3s, transform 0.3s;
}
.cookie-banner.hidden { opacity: 0; transform: translateY(20px); pointer-events: none; }
.cookie-banner p { font-size: 0.8rem; color: #94a3b8; line-height: 1.6; flex: 1; margin: 0; }
.cookie-banner a { color: var(--accent); }
.cookie-accept {
  background: var(--accent); color: #fff;
  padding: 8px 16px; border-radius: 6px;
  font-size: 0.8rem; font-weight: 600; cursor: pointer;
  white-space: nowrap; flex-shrink: 0;
}
.cookie-accept:hover { background: #1d4ed8; }

/* ── About ──────────────────────────────────────────────────────────────────── */
.about-hero { padding: 80px 0 64px; border-bottom: 1px solid var(--border); }
.about-hero h1 { max-width: 700px; margin-bottom: 20px; }
.about-hero p  { font-size: 1.0625rem; max-width: 620px; line-height: 1.8; }
.timeline { margin-top: 40px; display: flex; flex-direction: column; gap: 0; }
.timeline-item {
  display: flex; gap: 28px;
  padding: 20px 0; border-bottom: 1px solid var(--border);
}
.timeline-year { font-size: 0.75rem; font-weight: 700; color: var(--ink-muted); min-width: 48px; padding-top: 2px; }
.timeline-body h4 { font-size: 0.9rem; font-weight: 700; color: var(--ink); margin-bottom: 4px; text-transform: none; letter-spacing: 0; }
.timeline-body p  { font-size: 0.85rem; }
.fit-check {
  background: var(--bg-soft); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 40px; margin-top: 48px;
}
.fit-check h3 { margin-bottom: 20px; }
.fit-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; margin-top: 24px; }
.fit-col h4 { font-size: 0.7rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 14px; }
.fit-col h4.good { color: #16a34a; }
.fit-col h4.bad  { color: #dc2626; }
.fit-col ul { display: flex; flex-direction: column; gap: 8px; }
.fit-col li { font-size: 0.875rem; color: var(--ink-muted); padding-left: 16px; position: relative; }
.fit-col li::before { content: '—'; position: absolute; left: 0; color: var(--ink-light); }

/* ── Privacy / Contact ──────────────────────────────────────────────────────── */
.prose-page { max-width: 700px; padding: 80px 0; }
.prose-page h1 { margin-bottom: 12px; font-size: 2rem; }
.prose-page .updated { font-size: 0.8rem; color: var(--ink-light); margin-bottom: 40px; display: block; }
.prose-page h2 { font-size: 1.25rem; font-weight: 700; margin: 40px 0 14px; color: var(--ink); }
.prose-page p  { font-size: 0.95rem; line-height: 1.8; margin-bottom: 16px; }
.prose-page a  { color: var(--accent); }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; padding: 80px 0; }
.contact-form { display: flex; flex-direction: column; gap: 16px; }
.contact-form label { font-size: 0.8rem; font-weight: 600; color: var(--ink-muted); display: block; margin-bottom: 4px; }
.contact-form input, .contact-form textarea, .contact-form select {
  width: 100%; padding: 10px 14px;
  border: 1.5px solid var(--border); border-radius: var(--radius);
  font: inherit; font-size: 0.9rem; color: var(--ink);
  transition: border-color 0.2s;
}
.contact-form input:focus, .contact-form textarea:focus { outline: none; border-color: var(--accent); }
.contact-form textarea { min-height: 120px; resize: vertical; }

/* ── Responsive ─────────────────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .stages-grid   { grid-template-columns: repeat(2, 1fr); }
  .metrics-bar   { grid-template-columns: repeat(2, 1fr); }
  .footer-cols   { grid-template-columns: 1fr 1fr; }
  .blog-card     { grid-template-columns: 1fr; }
  .blog-card-cta { flex-direction: row; align-items: center; }
  .fit-cols      { grid-template-columns: 1fr; }
  .contact-grid  { grid-template-columns: 1fr; gap: 40px; }
  .benchmarks-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .nav-links     { display: none; }
  .nav-burger    { display: block; }
  .nav-ctas .btn-ghost { display: none; }
  .nav-ctas .btn-primary { padding: 8px 14px; font-size: 0.8rem; }
  .stages-grid   { grid-template-columns: 1fr; }
  .metrics-bar   { grid-template-columns: 1fr 1fr; }
  .footer-cols   { grid-template-columns: 1fr 1fr; gap: 28px; }
  .benchmarks-grid { grid-template-columns: 1fr; }
  .hero { padding: 64px 0 48px; }
  .section { padding: 64px 0; }
  .disciplines-grid { grid-template-columns: 1fr; }
}