/* Small native layout: fluid container, responsive grid, shared spacing scale. */
:root {
  color-scheme: light;
  --ink: #0f172a;
  --muted: #475569;
  --line: #dbe1e8;
  --surface: #f8fafc;
  --accent: #2563eb;
  --gutter: clamp(1rem, 3vw, 3rem);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
  color: var(--ink);
  background: #fff;
}
* { box-sizing: border-box; }
body { margin: 0; }
a { color: inherit; text-underline-offset: .2em; }
button, a { -webkit-tap-highlight-color: transparent; }
a:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }
.skip-link { position: absolute; top: -5rem; left: 1rem; padding: .5rem 1rem; background: #fff; z-index: 1; }
.skip-link:focus { top: .5rem; }
.site-header { display: flex; align-items: center; justify-content: space-between; gap: .75rem; background: #0f172a; color: #fff; }
.castudy .site-header { min-height: 4rem; padding: 0 1.5rem; }
.olqe .site-header { min-height: 2.75rem; padding: .5rem 1rem; }
.brand { min-width: 0; font-size: 1.25rem; line-height: 1.75rem; font-weight: 700; letter-spacing: -.025em; text-decoration: none; }
.header-link { flex-shrink: 0; font-size: .875rem; color: #cbd5e1; }
.olqe { --accent: #a16207; }
.olqe .brand { font-family: "Inter", sans-serif; font-size: 1.125rem; }
.brand-olqe { color: #fbbf24; }
.brand-pass { margin-left: .25em; color: #cbd5e1; }
.container-fluid { width: 100%; padding: 0 var(--gutter); }
.intro { padding: clamp(2rem, 5vw, 4rem) 0 2rem; }
.eyebrow, .section-label { margin: 0 0 .5rem; color: var(--muted); font-size: .875rem; font-weight: 600; }
h1 { margin: 0 0 1rem; font-size: clamp(1.7rem, 3vw, 2.5rem); line-height: 1.25; letter-spacing: -.03em; }
.lead { margin: 0 0 1.5rem; font-size: 1.0625rem; color: var(--muted); }
.actions { display: flex; flex-wrap: wrap; gap: .75rem; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: .5rem; min-height: 44px; padding: .65rem 1.2rem; border: 1px solid transparent; border-radius: .375rem; font-size: .9375rem; font-weight: 600; text-decoration: none; }
.button-primary { background: var(--ink); color: #fff; }
.button-primary:hover { background: #1e293b; }
.button-secondary { border-color: #cbd5e1; background: #fff; }
.button-secondary:hover { background: var(--surface); }
.reading-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid var(--line); }
.reading-section { padding: 1.5rem 0 2rem; min-width: 0; }
.reading-section + .reading-section { border-left: 1px solid var(--line); padding-left: 2rem; margin-left: 2rem; }
h2 { margin: 0 0 .75rem; font-size: 1.25rem; line-height: 1.35; }
.reading-section p:not(.section-label) { margin: 0 0 1rem; color: var(--muted); }
.text-link { color: var(--accent); font-size: .9375rem; font-weight: 600; }
.case-link { display: inline-block; margin-left: 1.5rem; }
@media (max-width: 40rem) {
  .header-link { display: none; }
  .reading-grid { grid-template-columns: minmax(0, 1fr); }
  .reading-section + .reading-section { border-top: 1px solid var(--line); border-left: 0; padding-left: 0; margin-left: 0; }
}