.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 70px;
  padding: 10px clamp(18px, 5vw, 72px);
  border-bottom: 1px solid var(--line);
  background: oklch(0.985 0.004 90 / 0.96);
  backdrop-filter: blur(12px);
}
.brand-link { display: inline-flex; align-items: center; gap: 11px; min-width: 0; }
.brand-link img { width: 40px; height: 40px; }
.brand-link strong { display: block; color: var(--ink); font-size: var(--text-lg); line-height: 1.1; }
.brand-link small { display: block; margin-top: 3px; color: var(--muted); font-size: var(--text-xs); }
.site-nav { display: flex; align-items: center; gap: 3px; }
.site-nav > a, .site-nav form > button, .language-switcher a { display: inline-flex; align-items: center; min-height: 38px; padding: 8px 11px; border-radius: var(--radius-sm); color: var(--slate); font-size: var(--text-sm); font-weight: 750; }
.site-nav > a:hover, .site-nav > a.is-active, .language-switcher a.is-active { color: var(--ink); background: var(--yellow-soft); }
.site-nav form { margin: 0; }
.site-nav .button { margin-left: 6px; }
.language-switcher { display: inline-flex; gap: 2px; margin-left: 6px; padding: 2px; border: 1px solid var(--line); border-radius: var(--radius-sm); }
.language-switcher a { min-height: 29px; padding: 4px 7px; font-size: var(--text-xs); }
.nav-toggle { display: none; width: 42px; height: 42px; padding: 0; color: var(--ink); border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--surface); }
.nav-toggle .icon { width: 19px; height: 19px; }

.public-hero { overflow: hidden; border-bottom: 1px solid var(--line); background: var(--surface); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.95fr); align-items: center; gap: clamp(32px, 7vw, 96px); max-width: 1440px; min-height: calc(100svh - 70px); padding: clamp(48px, 8vw, 112px) clamp(18px, 6vw, 86px); margin: 0 auto; }
.hero-copy h1 { max-width: 11ch; margin-bottom: 20px; font-size: var(--text-hero); }
.hero-copy > p:not(.eyebrow) { max-width: 59ch; margin-bottom: 0; font-size: var(--text-lg); line-height: 1.65; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.hero-proof { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 28px; color: var(--slate); font-size: var(--text-sm); }
.hero-proof span { display: inline-flex; align-items: center; gap: 7px; }
.hero-proof .icon { color: var(--blue); }

.campus-preview { position: relative; min-height: 480px; padding: clamp(18px, 3vw, 34px); border-radius: var(--radius-lg); background: var(--surface-dark); box-shadow: var(--shadow-md); }
.campus-preview::after { content: ""; position: absolute; inset: auto -9% -9% auto; width: 180px; height: 180px; border-radius: 50%; background: var(--yellow); }
.preview-window { position: relative; z-index: 1; display: grid; grid-template-columns: 86px minmax(0, 1fr); min-height: 410px; overflow: hidden; border-radius: 8px; background: var(--surface); box-shadow: var(--shadow-sm); }
.preview-rail { display: grid; align-content: space-between; padding: 16px 12px; color: oklch(0.78 0.01 258); background: var(--ink); }
.preview-rail div { display: grid; gap: 13px; }
.preview-rail span { display: block; width: 28px; height: 6px; border-radius: 99px; background: currentColor; opacity: 0.58; }
.preview-rail span:first-child { background: var(--yellow); opacity: 1; }
.preview-content { display: grid; align-content: start; gap: 18px; padding: 22px; background: var(--paper); }
.preview-bar { width: 42%; height: 10px; border-radius: 99px; background: var(--line); }
.preview-card { display: grid; gap: 12px; padding: 16px; border-radius: 7px; color: var(--surface); background: var(--blue); }
.preview-card small { opacity: 0.75; }
.preview-card strong { font-size: var(--text-lg); }
.preview-row { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 12px; }
.preview-mini { min-height: 100px; padding: 14px; border: 1px solid var(--line); border-radius: 7px; background: var(--surface); }
.preview-mini b { display: block; margin-bottom: 16px; font-size: var(--text-sm); }
.preview-mini span { display: block; height: 8px; margin-top: 8px; border-radius: 99px; background: var(--line); }
.preview-mini .signal { width: 62%; background: var(--yellow); }

.public-section { padding: clamp(56px, 8vw, 110px) clamp(18px, 6vw, 86px); }
.public-section-inner { max-width: 1280px; margin: 0 auto; }
.public-section-tint { background: var(--surface-alt); }
.section-intro { display: grid; grid-template-columns: minmax(0, 0.8fr) minmax(260px, 0.55fr); gap: 36px; align-items: end; margin-bottom: 36px; }
.section-intro h2 { max-width: 17ch; margin-bottom: 0; font-size: clamp(2rem, 4vw, 3.5rem); }
.section-intro p { max-width: 52ch; margin-bottom: 0; }
.method-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1px; border: 1px solid var(--line); background: var(--line); }
.method-grid article { min-height: 210px; padding: 22px; background: var(--surface); }
.method-grid .icon { width: 24px; height: 24px; margin-bottom: 34px; color: var(--blue); }
.method-grid h3 { margin-bottom: 8px; font-size: var(--text-lg); }
.method-grid p { margin-bottom: 0; font-size: var(--text-sm); }
.level-route { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.level-route article { min-height: 190px; padding: 22px; border-top: 4px solid var(--blue); background: var(--surface); }
.level-route article:nth-child(2) { border-top-color: oklch(0.58 0.12 255); }
.level-route article:nth-child(3) { border-top-color: var(--yellow-strong); }
.level-route article:nth-child(4) { border-top-color: var(--ink); }
.level-route small { color: var(--muted); font-size: var(--text-xs); font-weight: 800; text-transform: uppercase; letter-spacing: 0.07em; }
.level-route h3 { margin: 14px 0 8px; }
.level-route p { font-size: var(--text-sm); }
.theo-section { display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(320px, 1.1fr); gap: clamp(28px, 6vw, 84px); align-items: center; }
.theo-statement { padding: clamp(26px, 5vw, 50px); color: var(--surface); background: var(--ink); }
.theo-statement h2, .theo-statement p { color: inherit; }
.theo-statement p { opacity: 0.78; }
.diagnostic-list { display: grid; gap: 0; border-top: 1px solid var(--line); }
.diagnostic-list li { display: grid; grid-template-columns: 36px 1fr; gap: 12px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.diagnostic-list b { display: grid; width: 28px; height: 28px; place-items: center; border-radius: 50%; color: var(--ink); background: var(--yellow); font-size: var(--text-xs); }
.diagnostic-list p { margin: 4px 0 0; font-size: var(--text-sm); }
.plan-comparison { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.plan-card { display: grid; align-content: start; gap: 18px; min-height: 100%; padding: 24px; border: 1px solid var(--line); background: var(--surface); }
.plan-card.is-highlighted { border-color: var(--yellow-strong); box-shadow: inset 0 4px 0 var(--yellow); }
.plan-card h3 { margin: 0; }
.plan-price { display: flex; align-items: baseline; gap: 8px; }
.plan-price strong { font-size: var(--text-2xl); }
.plan-price span { color: var(--muted); font-size: var(--text-sm); }
.benefit-list { display: grid; gap: 10px; padding: 0; margin: 0; list-style: none; }
.benefit-list li { display: flex; gap: 8px; color: var(--slate); font-size: var(--text-sm); }
.benefit-list .icon { margin-top: 2px; color: var(--blue); }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { padding: 20px 0; border-bottom: 1px solid var(--line); }
.faq-list summary { display: flex; align-items: center; justify-content: space-between; gap: 16px; cursor: pointer; color: var(--ink); font-weight: 750; }
.faq-list summary::after { content: "+"; color: var(--blue); font-size: var(--text-xl); }
.faq-list details[open] summary::after { content: "−"; }
.faq-list p { max-width: 72ch; margin: 12px 0 0; }
.public-cta { padding: clamp(42px, 7vw, 80px); color: var(--surface); background: var(--blue); }
.public-cta h2, .public-cta p { color: inherit; }
.public-cta p { max-width: 58ch; opacity: 0.83; }
.public-cta .button-primary { background: var(--yellow); }

.site-footer { display: flex; align-items: flex-start; justify-content: space-between; gap: 24px; padding: 32px clamp(18px, 6vw, 86px); color: oklch(0.86 0.01 258); background: var(--ink); }
.site-footer strong { display: block; color: var(--surface); }
.site-footer span { display: block; margin-top: 4px; font-size: var(--text-sm); }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 16px; font-size: var(--text-sm); }
.site-footer a:hover { color: var(--yellow); }