:root {
  --bg: #f7f8f4;
  --card: #ffffff;
  --ink: #242722;
  --muted: #657064;
  --line: #d9dfd4;
  --green: #4f8d64;
  --blue: #4f78a8;
  --gold: #d9a441;
  --clay: #b86646;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at top left, rgba(79,141,100,.18), transparent 30rem), var(--bg);
  line-height: 1.65;
}
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(247,248,244,.9);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(217,223,212,.82);
}
.nav {
  max-width: 1080px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; color: var(--ink); }
.brand-mark { width: 34px; height: 34px; border-radius: 8px; background: linear-gradient(145deg, var(--green), var(--gold)); box-shadow: 0 10px 24px rgba(79,141,100,.18); }
.nav-links { display: flex; gap: 14px; flex-wrap: wrap; justify-content: flex-end; font-size: 14px; font-weight: 700; }
.hero, .page { max-width: 1080px; margin: 0 auto; padding: 54px 20px; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(280px, .9fr); gap: 28px; align-items: center; }
.eyebrow { color: var(--clay); font-weight: 800; text-transform: uppercase; letter-spacing: .08em; font-size: 13px; }
h1 { margin: 8px 0 14px; font-size: clamp(38px, 6vw, 66px); line-height: 1.02; letter-spacing: 0; }
h2 { margin: 0 0 14px; font-size: 28px; line-height: 1.18; }
h3 { margin: 26px 0 8px; font-size: 19px; line-height: 1.28; }
p { margin: 0 0 14px; }
.lead { color: var(--muted); font-size: 18px; max-width: 680px; }
.actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 24px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 0 18px; border-radius: 8px; font-weight: 800; border: 1px solid var(--line); }
.button.primary { background: var(--ink); color: var(--card); border-color: var(--ink); }
.button.secondary { background: var(--card); color: var(--ink); }
.panel { background: rgba(255,255,255,.82); border: 1px solid var(--line); border-radius: 8px; padding: 22px; box-shadow: 0 24px 50px rgba(42, 60, 46, .08); }
.music-card { aspect-ratio: 4 / 3; display: grid; place-items: center; overflow: hidden; }
.music-visual { width: min(70%, 300px); aspect-ratio: 1; border-radius: 8px; position: relative; background: linear-gradient(145deg, rgba(79,141,100,.18), rgba(217,164,65,.18)); border: 1px solid rgba(36,39,34,.1); }
.music-visual::before { content: ""; position: absolute; left: 28%; top: 18%; width: 18%; height: 54%; border-radius: 999px; background: var(--green); box-shadow: 48px 22px 0 -6px var(--gold); transform: rotate(8deg); }
.music-visual::after { content: ""; position: absolute; left: 22%; bottom: 20%; width: 56%; height: 22%; border-radius: 999px; border: 10px solid rgba(79,120,168,.55); border-left-color: transparent; border-bottom-color: transparent; transform: rotate(-12deg); }
.summary-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 28px; }
.summary-item { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 18px; }
.summary-item strong { display: block; font-size: 15px; margin-bottom: 6px; }
.summary-item span { color: var(--muted); font-size: 14px; }
.doc-layout { display: grid; grid-template-columns: 230px minmax(0, 1fr); gap: 28px; align-items: start; }
.toc { position: sticky; top: 76px; background: rgba(255,255,255,.86); border: 1px solid var(--line); border-radius: 8px; padding: 16px; font-size: 14px; }
.toc a { display: block; padding: 7px 0; color: var(--muted); }
.document { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 30px; }
.meta { color: var(--muted); font-weight: 700; margin-bottom: 24px; }
ul { margin: 0 0 14px 22px; padding: 0; }
.footer { border-top: 1px solid var(--line); color: var(--muted); padding: 26px 20px; text-align: center; font-size: 14px; }
@media (max-width: 800px) {
  .hero-grid, .doc-layout, .summary-grid { grid-template-columns: 1fr; }
  .toc { position: static; }
  .document { padding: 22px; }
  .nav { align-items: flex-start; flex-direction: column; }
}