@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
  --bg: #FFFFFF;
  --surface: #FAFAFA;
  --surface-2: #F2F2F2;
  --line: #E2E2E2;
  --line-soft: #ECECEC;
  --fg-1: #111111;
  --fg-2: #333333;
  --fg-3: #6B6B6B;
  --fg-4: #9A9A9A;
  --accent: #111111;
  --accent-dim: #F2F2F2;
  --accent-line: #CCCCCC;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg-2);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-weight: 400;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

.wrap { max-width: 740px; margin: 0 auto; padding: 0 28px; }
.wrap-wide { max-width: 900px; margin: 0 auto; padding: 0 28px; }

/* ---- Top nav ---- */
.topnav {
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(10px);
  z-index: 20;
}
.topnav .wrap-wide { display: flex; align-items: center; justify-content: space-between; padding-top: 18px; padding-bottom: 18px; }
.topnav .brand { font-weight: 600; color: var(--fg-1); text-decoration: none; font-size: 15px; letter-spacing: -0.01em; }
.topnav .brand span { color: var(--fg-1); border-bottom: 2px solid var(--fg-1); }
.topnav nav { display: flex; gap: 28px; }
.topnav nav a { text-decoration: none; color: var(--fg-3); font-size: 14px; font-weight: 400; transition: color .15s; }
.topnav nav a:hover { color: var(--fg-1); }

/* ---- Hero (case pages) ---- */
.hero { padding: 88px 28px 56px; border-bottom: 1px solid var(--line); }
.hero .wrap { text-align: left; }
.kicker {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-3);
  margin: 0 0 20px;
}
.hero h1 {
  font-size: clamp(30px, 4.4vw, 46px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.18;
  color: var(--fg-1);
  margin: 0 0 24px;
  max-width: 650px;
}
.byline { font-size: 14px; color: var(--fg-3); margin: 0; }
.byline strong { color: var(--fg-1); font-weight: 500; }
.byline .sep { color: var(--fg-4); margin: 0 8px; }

/* ---- Stat strip ---- */
.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  margin-top: 40px;
}
@media (max-width: 560px) { .stats { grid-template-columns: repeat(2, 1fr); } }
.stat { background: var(--bg); padding: 22px 18px; }
.stat .num { font-size: clamp(19px, 2.4vw, 26px); font-weight: 700; color: var(--fg-1); letter-spacing: -0.01em; white-space: nowrap; }
.stat .num .accent { color: var(--fg-1); }
.stat .lbl { font-size: 12px; color: var(--fg-3); margin-top: 6px; }

/* ---- Body ---- */
main { padding: 8px 28px 96px; }
section { padding: 48px 0; border-bottom: 1px solid var(--line); }
section:last-child { border-bottom: none; }

h2 {
  font-size: 22px;
  font-weight: 600;
  color: var(--fg-1);
  letter-spacing: -0.01em;
  margin: 0 0 24px;
}
h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--fg-1);
  margin: 32px 0 12px;
}
h3:first-child { margin-top: 0; }

p { margin: 0 0 16px; font-size: 15.5px; color: var(--fg-2); }
p.lead { font-size: 18px; color: var(--fg-1); font-weight: 400; line-height: 1.65; }
strong { color: var(--fg-1); font-weight: 600; }
em { color: var(--fg-1); font-style: italic; }

ul, ol { margin: 0 0 18px; padding-left: 22px; }
li { font-size: 15.5px; margin-bottom: 8px; color: var(--fg-2); }
li::marker { color: var(--fg-4); }

.callout {
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--fg-1);
  border-radius: 6px;
  padding: 20px 22px;
  margin: 20px 0;
  font-size: 15.5px;
  color: var(--fg-1);
}
.callout strong { color: var(--fg-1); }

table {
  width: 100%;
  border-collapse: collapse;
  margin: 8px 0 20px;
  font-size: 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
}
th, td { text-align: left; padding: 11px 14px; border-bottom: 1px solid var(--line); }
th {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--fg-3);
  background: var(--surface-2);
}
td { color: var(--fg-2); background: var(--bg); }
td.delta { color: var(--fg-1); font-weight: 600; }
tr:last-child td { border-bottom: none; }

.phase {
  border-left: 2px solid var(--line);
  padding-left: 20px;
  margin: 0 0 28px;
}
.phase .ph-label { font-size: 12px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: var(--fg-3); margin-bottom: 6px; }
.phase .ph-title { font-size: 16px; font-weight: 600; color: var(--fg-1); margin-bottom: 10px; }
.phase .ph-impl { font-size: 13px; color: var(--fg-4); margin: 10px 0; }

.results-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px,1fr)); gap: 12px; margin: 8px 0 4px; }
.result-card { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 16px 18px; }
.result-card .v { font-size: 20px; font-weight: 700; color: var(--fg-1); }
.result-card .v .accent { color: var(--fg-1); }
.result-card .k { font-size: 12.5px; color: var(--fg-3); margin-top: 4px; }

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
@media (max-width: 640px) { .two-col { grid-template-columns: 1fr; } }
.two-col h3 { margin-top: 0; }

.tools-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px,1fr)); gap: 24px; }
.tools-grid h4 { font-size: 13px; font-weight: 600; color: var(--fg-3); text-transform: uppercase; letter-spacing: 0.04em; margin: 0 0 10px; }
.tools-grid ul { margin-bottom: 0; }

footer.site-footer { padding: 56px 28px 72px; border-top: 1px solid var(--line); margin-top: 24px; }
footer.site-footer .wrap-wide { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px; }
footer.site-footer p { font-size: 13px; color: var(--fg-4); margin: 0; }
footer.site-footer .links { display: flex; gap: 20px; }
footer.site-footer .links a { font-size: 13px; color: var(--fg-3); text-decoration: none; }
footer.site-footer .links a:hover { color: var(--fg-1); }

.back-link { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; color: var(--fg-3); text-decoration: none; margin-bottom: 8px; }
.back-link:hover { color: var(--fg-1); }

/* ---- Home page ---- */
.home-hero { padding: 96px 28px 64px; }
.home-hero .eyebrow { font-size: 13px; font-weight: 500; letter-spacing: 0.08em; text-transform: uppercase; color: var(--fg-3); margin: 0 0 18px; }
.home-hero h1 { font-size: clamp(32px, 5vw, 52px); font-weight: 700; letter-spacing: -0.02em; line-height: 1.15; color: var(--fg-1); margin: 0 0 22px; max-width: 720px; }
.home-hero p.intro { font-size: 18px; color: var(--fg-2); max-width: 620px; line-height: 1.7; margin: 0 0 32px; }
.home-hero .cta-row { display: flex; gap: 14px; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 11px 20px; border-radius: 8px; font-size: 14px; font-weight: 500; text-decoration: none; transition: all .15s; }
.btn-primary { background: var(--fg-1); color: #FFFFFF; }
.btn-primary:hover { opacity: 0.82; }
.btn-ghost { border: 1px solid var(--line); color: var(--fg-2); }
.btn-ghost:hover { border-color: var(--fg-1); color: var(--fg-1); }

.section-label { font-size: 12px; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; color: var(--fg-4); margin: 0 0 28px; }

.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; }
.card {
  display: block;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 26px 26px 24px;
  text-decoration: none;
  transition: border-color .15s, transform .15s;
}
.card:hover { border-color: var(--fg-1); transform: translateY(-2px); }
.card .card-kicker { font-size: 11px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--fg-3); margin: 0 0 12px; }
.card h3 { margin: 0 0 10px; font-size: 18px; color: var(--fg-1); }
.card p { font-size: 14px; color: var(--fg-3); margin: 0 0 16px; line-height: 1.6; }
.card .card-meta { font-size: 12.5px; color: var(--fg-4); display: flex; gap: 10px; flex-wrap: wrap; }
.card .card-meta span:not(:last-child)::after { content: '\00b7'; margin-left: 10px; color: var(--line); }

.product-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; }
.product-card {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  transition: border-color .15s, transform .15s;
}
.product-card:hover { border-color: var(--fg-1); transform: translateY(-2px); }
.product-card .thumb { display: block; border-bottom: 1px solid var(--line-soft); background: var(--surface); }
.product-card .thumb img { display: block; width: 100%; aspect-ratio: 16 / 9; object-fit: cover; object-position: top; }
.product-card .product-body { padding: 22px 26px 24px; }
.product-card h3 { margin: 0 0 10px; font-size: 18px; color: var(--fg-1); }
.product-card p { font-size: 14px; color: var(--fg-3); margin: 0 0 16px; line-height: 1.6; }
.product-card p.card-kicker { font-size: 11px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--fg-3); margin: 0 0 12px; }
.product-links { display: flex; gap: 16px; flex-wrap: wrap; }
.product-links a { font-size: 13px; color: var(--fg-2); text-decoration: none; border-bottom: 1px solid var(--accent-line); padding-bottom: 1px; }
.product-links a:hover { color: var(--fg-1); border-bottom-color: var(--fg-1); }

.tag-row { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 14px; }
.tag { font-size: 11.5px; padding: 4px 10px; border-radius: 999px; background: var(--surface); border: 1px solid var(--line); color: var(--fg-3); }

.home-section { padding: 20px 0 72px; }

.about-block { display: grid; grid-template-columns: 1fr; gap: 20px; }
.about-block p { font-size: 15.5px; }

@media print {
  section, .phase, .callout, .result-card, table, .results-grid { break-inside: avoid; }
  h2, h3 { break-after: avoid; }
}