:root {
  --bg: #0b0c0f;
  --bg-raised: #14161a;
  --border: #262a31;
  --text: #f2f3f5;
  --text-dim: #9aa0a8;
  --accent: #ffffff;
  --max: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

a { color: inherit; }

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- Header ---- */

header.site {
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(11, 12, 15, 0.92);
  backdrop-filter: blur(6px);
  z-index: 10;
}

header.site .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand-lockup { height: 26px; display: block; }
.brand-lockup img { height: 100%; display: block; }

nav.main a {
  text-decoration: none;
  color: var(--text-dim);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.02em;
  margin-left: 28px;
  transition: color 0.15s ease;
}

nav.main a:hover, nav.main a.active { color: var(--text); }

/* ---- Hero ---- */

.hero {
  padding: 96px 0 72px;
  border-bottom: 1px solid var(--border);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 20px;
}

.eyebrow svg { width: 18px; height: 18px; }

.hero h1 {
  font-size: clamp(36px, 6vw, 60px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0 0 20px;
  max-width: 16ch;
}

.hero p.lede {
  font-size: 19px;
  color: var(--text-dim);
  max-width: 54ch;
  margin: 0 0 32px;
}

.cta-row { display: flex; gap: 14px; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 22px;
  border-radius: 8px;
  font-weight: 700;
  font-size: 14.5px;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 0.12s ease, opacity 0.12s ease;
}

.btn:hover { transform: translateY(-1px); }

.btn.primary { background: var(--accent); color: #0b0c0f; }
.btn.ghost { border-color: var(--border); color: var(--text); }

/* ---- Section heading ---- */

.section { padding: 72px 0; border-bottom: 1px solid var(--border); }
.section:last-of-type { border-bottom: none; }

.section-head { max-width: 60ch; margin-bottom: 40px; }
.section-head .kicker {
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 10px;
}
.section-head h2 { font-size: 30px; margin: 0 0 12px; letter-spacing: -0.01em; }
.section-head p { color: var(--text-dim); margin: 0; font-size: 16px; }

/* ---- Pillars ---- */

.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

@media (max-width: 800px) { .pillars { grid-template-columns: 1fr; } }

.pillar {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px;
}

.pillar .icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: #0b0c0f;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}

.pillar .icon svg { width: 18px; height: 18px; }

.pillar h3 { margin: 0 0 8px; font-size: 18px; }
.pillar p { margin: 0; color: var(--text-dim); font-size: 14.5px; }

/* ---- Guide cards ---- */

.guides {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

@media (max-width: 800px) { .guides { grid-template-columns: 1fr; } }

.guide-card {
  display: block;
  text-decoration: none;
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  transition: border-color 0.15s ease;
}

.guide-card:hover { border-color: #454b56; }

.guide-card .tag {
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #0b0c0f;
  background: #fff;
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  margin: 18px 0 14px;
  margin-left: 18px;
}

.guide-card h3 { margin: 0 18px 8px; font-size: 17px; }
.guide-card p { margin: 0 18px 20px; color: var(--text-dim); font-size: 14px; }

/* ---- Footer ---- */

footer.site {
  border-top: 1px solid var(--border);
  padding: 40px 0;
}

footer.site .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

footer.site .brand-lockup { height: 20px; opacity: 0.85; }
footer.site .fine { color: var(--text-dim); font-size: 13px; }

/* ---- Article pages ---- */

.article-head { padding: 64px 0 32px; border-bottom: 1px solid var(--border); }
.article-head .tag {
  font-size: 12px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--text-dim); margin-bottom: 16px; display: block;
}
.article-head h1 { font-size: clamp(28px, 4.5vw, 42px); margin: 0 0 14px; letter-spacing: -0.01em; }
.article-head p.dek { color: var(--text-dim); font-size: 17px; max-width: 58ch; margin: 0; }

.article-body { padding: 48px 0 88px; max-width: 72ch; }
.article-body h2 { font-size: 22px; margin: 40px 0 12px; }
.article-body h3 { font-size: 18px; margin: 28px 0 10px; }
.article-body p { color: #d7d9dc; margin: 0 0 16px; font-size: 16px; }
.article-body ul, .article-body ol { color: #d7d9dc; font-size: 16px; padding-left: 22px; }
.article-body li { margin-bottom: 8px; }
.article-body code {
  background: var(--bg-raised); border: 1px solid var(--border);
  padding: 2px 6px; border-radius: 4px; font-size: 14px;
}
.article-body .callout {
  background: var(--bg-raised); border: 1px solid var(--border);
  border-left: 3px solid #fff; border-radius: 8px; padding: 16px 18px; margin: 24px 0;
  font-size: 14.5px; color: var(--text-dim);
}
.back-link {
  display: inline-flex; align-items: center; gap: 6px;
  color: var(--text-dim); text-decoration: none; font-size: 14px; font-weight: 600;
  margin-bottom: 24px;
}
.back-link:hover { color: var(--text); }

/* ---- About page ---- */

.about-hero { padding: 80px 0 48px; border-bottom: 1px solid var(--border); }
.about-hero h1 { font-size: clamp(32px, 5vw, 48px); margin: 0 0 18px; letter-spacing: -0.02em; max-width: 18ch; }
.about-hero p { color: var(--text-dim); font-size: 18px; max-width: 56ch; }