:root {
  --cream: #eaf4e7;
  --paper: #fffdf4;
  --ink: #263238;
  --muted: #5a6e67;
  --cobalt: #2356a8;
  --coral: #ff6b5e;
  --sunflower: #f2c94c;
  --line: #c8d8cf;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--cream); color: var(--ink); font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif; }
a { color: inherit; }
.site-header { display: flex; align-items: center; justify-content: space-between; padding: 22px clamp(22px, 5vw, 76px); border-bottom: 1px solid rgba(25,56,59,.14); }
.brand { display: flex; align-items: center; gap: 11px; font-weight: 720; text-decoration: none; }
.brand-mark { display: grid; place-items: center; width: 35px; height: 35px; border-radius: 50%; background: var(--cobalt); color: #fff; font-family: Georgia, serif; }
.book-chip { padding: 8px 13px; border: 1px solid var(--line); border-radius: 999px; font-size: 13px; }
.hero { position: relative; overflow: hidden; min-height: 570px; padding: clamp(72px,10vw,126px) clamp(22px,9vw,140px) 96px; background: radial-gradient(circle at 84% 18%,rgba(242,201,76,.55),transparent 24%),linear-gradient(130deg,var(--paper),#e5f1e7 68%,#d4e7df); }
.hero-copy-wrap { position: relative; z-index: 1; }
.eyebrow { margin: 0 0 18px; color: var(--cobalt); font-size: 12px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
h1,h2,h3 { font-family: Georgia,"Times New Roman",serif; }
h1 { max-width: 880px; margin: 0; font-size: clamp(50px,8vw,102px); line-height: .96; letter-spacing: -.045em; }
.hero-copy { max-width: 660px; margin: 30px 0; font-size: clamp(18px,2vw,23px); line-height: 1.55; color: #3c5555; }
.primary-link { display: inline-block; padding: 14px 20px; border-radius: 999px; background: var(--ink); color: #fff; font-weight: 760; text-decoration: none; }
.decision-motif { position: absolute; right: clamp(10px,7vw,100px); bottom: 38px; width: 290px; height: 210px; opacity: .94; }
.device-card { position: absolute; right: 18px; top: 0; width: 122px; height: 178px; border: 3px solid var(--cobalt); border-radius: 22px; background: rgba(255,255,255,.36); box-shadow: inset 0 0 0 8px rgba(35,86,168,.06); }
.route { position: absolute; left: 12px; width: 175px; height: 92px; border-top: 5px solid; border-radius: 50%; transform: rotate(-10deg); }
.route-one { top: 52px; color: var(--coral); }
.route-two { top: 105px; left: 40px; color: var(--sunflower); transform: rotate(13deg); }
.choice-dot { position: absolute; width: 20px; height: 20px; border-radius: 50%; box-shadow: 0 0 0 7px rgba(255,255,255,.65); }
.dot-one { left: 13px; top: 45px; background: var(--coral); }
.dot-two { left: 206px; top: 147px; background: var(--sunflower); }
.how { padding: 68px clamp(22px,7vw,110px); background: var(--ink); color: #fff; }
.how .eyebrow { color: var(--sunflower); }
.how h2 { max-width: 820px; margin: 0 0 28px; font-size: clamp(36px,5vw,62px); line-height: 1.04; }
.how ol { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 24px; margin: 0; padding-left: 22px; }
.how li { padding-right: 18px; line-height: 1.6; color: #e8efec; }
.track-section { padding: 80px clamp(22px,7vw,110px) 110px; }
.section-heading { display: flex; justify-content: space-between; gap: 35px; align-items: end; margin-bottom: 36px; }
.section-heading h2 { margin: 0; font-size: clamp(38px,5vw,64px); }
.section-heading > p { max-width: 480px; color: var(--muted); line-height: 1.6; }
.unit-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 22px; }
.unit-card { scroll-margin-top: 20px; padding: clamp(24px,4vw,38px); border: 1px solid var(--line); border-radius: 25px; background: rgba(255,253,244,.88); box-shadow: 0 18px 50px rgba(35,86,168,.07); }
.unit-number { color: var(--cobalt); font-size: 12px; font-weight: 850; letter-spacing: .12em; text-transform: uppercase; }
.unit-card h3 { margin: 12px 0 10px; font-size: clamp(27px,3vw,39px); line-height: 1.08; }
.unit-card > p { min-height: 48px; color: var(--muted); line-height: 1.5; }
.track { margin-top: 18px; padding: 15px; border-radius: 16px; background: #fff; border: 1px solid #eaded3; }
.track.dialogue { background: #eef3ff; }
.track-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 10px; }
.track-heading strong { font-size: 15px; }
.track-heading small { color: var(--muted); }
audio { display: block; width: 100%; height: 42px; }
.download { display: inline-block; margin-top: 9px; color: var(--cobalt); font-size: 13px; font-weight: 750; text-decoration-thickness: 1px; text-underline-offset: 3px; }
.loading,.error { grid-column: 1/-1; padding: 32px; border-radius: 18px; background: #fff; color: var(--muted); }
footer { display: flex; justify-content: space-between; gap: 20px; padding: 34px clamp(22px,7vw,110px); background: #102d30; color: #e7efec; font-size: 13px; }
footer p { margin: 0; }

@media (max-width: 760px) {
  .book-chip { display: none; }
  .hero { min-height: 650px; }
  h1 { font-size: 44px; line-height: 1.02; letter-spacing: -.035em; }
  .decision-motif { right: -35px; opacity: .5; }
  .how ol,.unit-grid { grid-template-columns: 1fr; }
  .section-heading { display: block; }
  footer { display: block; }
  footer p + p { margin-top: 8px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }