:root {
  --bg: #0b1020;
  --bg-2: #11182d;
  --panel: rgba(19, 28, 50, 0.74);
  --panel-border: rgba(255, 255, 255, 0.1);
  --text: #eef2ff;
  --muted: #b8c0db;
  --accent: #8fd3ff;
  --accent-2: #d7b4ff;
  --learned-bg: rgba(150, 240, 193, 0.12);
  --learned-border: rgba(150, 240, 193, 0.38);
  --song-bg: rgba(255, 215, 120, 0.12);
  --song-border: rgba(255, 215, 120, 0.38);
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.34);
  --radius: 24px;
  --max-width: 1180px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(143, 211, 255, 0.18), transparent 32%),
    radial-gradient(circle at 85% 15%, rgba(215, 180, 255, 0.16), transparent 28%),
    linear-gradient(160deg, var(--bg) 0%, var(--bg-2) 100%);
  line-height: 1.55;
}
a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; }
.shell { width: min(calc(100% - 2rem), var(--max-width)); margin: 0 auto; }
.site-header { padding: 1.25rem 0 0; }
.brand {
  display: inline-flex; align-items: center; gap: .7rem; padding: .7rem 1rem;
  border: 1px solid rgba(255,255,255,.1); border-radius: 999px;
  background: rgba(255,255,255,.04); backdrop-filter: blur(12px);
  box-shadow: 0 10px 30px rgba(0,0,0,.18); font-size: .95rem; color: var(--muted);
}
.brand-mark {
  width: .75rem; height: .75rem; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 18px rgba(143,211,255,.7);
}
main { padding-bottom: 2rem; }
.hero { padding: 2.5rem 0 1.4rem; }
.hero-panel, .panel {
  position: relative; overflow: hidden; border: 1px solid var(--panel-border); border-radius: calc(var(--radius) + 6px);
  background: linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.02)); backdrop-filter: blur(18px); box-shadow: var(--shadow);
}
.hero-panel::before, .panel::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(circle at 15% 20%, rgba(143, 211, 255, 0.16), transparent 25%), radial-gradient(circle at 85% 80%, rgba(215,180,255,.12), transparent 24%);
  pointer-events: none;
}
.hero-content, .panel-content { position: relative; padding: clamp(1.5rem, 3vw, 3rem); }
.crumbs {
  display: flex; flex-wrap: wrap; gap: .55rem;
  margin-bottom: 1rem; color: var(--muted); font-size: .95rem;
}
.crumbs a:hover { color: var(--text); }
.eyebrow, .chip, .badge {
  display: inline-flex; align-items: center; gap: .55rem; width: fit-content; padding: .45rem .85rem; border-radius: 999px;
  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.08); color: var(--muted); font-size: .92rem;
}
.badge.learned {
  background: var(--learned-bg);
  border-color: var(--learned-border);
  color: #d6ffe8;
}
.badge.song {
  background: var(--song-bg);
  border-color: var(--song-border);
  color: #ffe8a7;
}
.hero h1 { margin: .6rem 0 0; font-size: clamp(2.5rem, 6vw, 4.8rem); line-height: .95; letter-spacing: -0.04em; }
.lead { max-width: 68ch; margin: 1rem 0 0; color: var(--muted); font-size: clamp(1.02rem, 1.6vw, 1.14rem); }
.quick-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 1rem; margin-top: 1.6rem; }
.mini-stat, .search-panel, .list-panel, .card-link, .results-panel { position: relative; border-radius: var(--radius); background: var(--panel); border: 1px solid rgba(255,255,255,.09); box-shadow: 0 12px 30px rgba(0,0,0,.18); }
.mini-stat { padding: 1rem 1.1rem; }
.mini-stat strong { display: block; font-size: 1.65rem; letter-spacing: -0.03em; }
.mini-stat span { color: var(--muted); font-size: .94rem; }
.section { padding: 0 0 1.6rem; }
.section-head { display:flex; justify-content:space-between; gap:1rem; align-items:end; margin-bottom: .85rem; }
.section h2 { margin: 0 0 .2rem; font-size: clamp(1.5rem, 2vw, 2rem); letter-spacing: -0.03em; }
.section-copy { color: var(--muted); max-width: 72ch; margin:0; }
.card-grid { display:grid; grid-template-columns: repeat(auto-fit,minmax(220px,1fr)); gap:1rem; }
.card-link { display:grid; gap:.85rem; padding:1.25rem; min-height: 190px; transition: transform .18s ease, border-color .18s ease, background .18s ease, box-shadow .18s ease; cursor:pointer; text-align:left; }
.card-link:hover, .card-link:focus-visible { transform: translateY(-4px); border-color: rgba(143,211,255,.35); background: rgba(24,35,61,.86); box-shadow: 0 20px 40px rgba(0,0,0,.24); outline:none; }
.card-top { display:flex; align-items:center; justify-content:space-between; gap:1rem; }
.card-kicker { display:inline-flex; align-items:center; width: fit-content; padding:.4rem .75rem; border-radius:999px; background: rgba(255,255,255,.07); color:var(--muted); font-size:.82rem; text-transform: uppercase; letter-spacing:.08em; }
.arrow { display:grid; place-items:center; width:2.4rem; height:2.4rem; border-radius:999px; background: linear-gradient(135deg, rgba(143,211,255,.18), rgba(215,180,255,.18)); font-size:1.15rem; }
.card-link h3 { margin:0; font-size:1.5rem; font-weight:600; letter-spacing:-0.02em; line-height:1.2; color:#d6ecff; text-shadow: 0 0 6px rgba(214,236,255,.15); }
.card-link p { margin:0; color: rgba(230,237,243,.65); font-size:.95rem; line-height:1.4; }
.card-footer { align-self:end; color: var(--accent); font-weight: 600; font-size:.9rem; }
.layout-two { display:grid; grid-template-columns: 1.18fr .82fr; gap:1rem; }
.search-panel, .list-panel, .results-panel { padding:1.2rem; }
.search-grid { display:grid; grid-template-columns: 1.4fr 1fr 1fr; gap:.9rem; }
.field { display:grid; gap:.42rem; }
label { font-size:.92rem; color: var(--muted); }
input[type="search"], select {
  width:100%; border:1px solid rgba(255,255,255,.12); border-radius: 16px; background: rgba(7,12,24,.75); color:var(--text);
  padding:.9rem 1rem; outline:none;
}
input[type="search"]:focus, select:focus { border-color: rgba(143,211,255,.46); box-shadow: 0 0 0 3px rgba(143,211,255,.12); }
.toggle-row, .preset-row { display:flex; flex-wrap: wrap; gap:.55rem; margin-top: .9rem; }
.toggle-row button, .preset-row button, .browse-link {
  border:1px solid rgba(255,255,255,.12); background: rgba(255,255,255,.05); color: var(--text); border-radius: 999px; padding:.6rem .9rem; cursor:pointer;
}
.toggle-row button.is-active, .preset-row button.is-active { background: rgba(143,211,255,.18); border-color: rgba(143,211,255,.35); }
.suggestions { margin-top:.55rem; border-radius: 18px; background: rgba(7,12,24,.9); border:1px solid rgba(255,255,255,.08); overflow:hidden; display:none; }
.suggestions.has-items { display:block; }
.suggestion { display:block; width:100%; text-align:left; padding:.75rem .9rem; border:0; border-bottom:1px solid rgba(255,255,255,.06); cursor:pointer; background:transparent; color:var(--text); }
.suggestion:last-child { border-bottom:none; }
.suggestion:hover { background: rgba(255,255,255,.05); }
.suggestion strong { display:block; }
.suggestion small { color: var(--muted); }
.browse-grid { display:grid; grid-template-columns: repeat(auto-fit,minmax(210px,1fr)); gap:.8rem; }
.browse-link {
  padding:.9rem 1rem; border-radius: 18px; background: rgba(255,255,255,.04);
  display:flex; justify-content:space-between; gap:.8rem; align-items:center;
}
.browse-link span:last-child { color: var(--muted); }
.results-list { list-style:none; padding:0; margin:0; display:grid; gap:.75rem; }
.result-item {
  border-radius: 18px; border:1px solid rgba(255,255,255,.08); background: rgba(255,255,255,.035); padding: .95rem 1rem;
}
.result-item.learned { border-color: var(--learned-border); background: linear-gradient(180deg, rgba(150,240,193,.09), rgba(255,255,255,.03)); box-shadow: inset 0 0 0 1px rgba(150,240,193,.06); }
.result-title { font-size:1.07rem; font-weight:650; letter-spacing:-0.01em; }
.meta-row { display:flex; flex-wrap:wrap; gap:.55rem; margin-top:.45rem; color: var(--muted); font-size:.92rem; }
.empty-note { color: var(--muted); padding: .8rem 0 .2rem; }
.footer-panel { display:flex; justify-content:space-between; gap:1rem; align-items:center; padding:1rem 1.2rem; border-radius:18px; background: rgba(255,255,255,.04); border:1px solid rgba(255,255,255,.08); color: var(--muted); font-size:.95rem; }
.site-footer { padding: 0 0 2rem; }
@media (max-width: 920px) {
  .layout-two, .search-grid, .quick-grid { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
  .card-grid, .browse-grid { grid-template-columns: 1fr; }
  .footer-panel { flex-direction:column; align-items:flex-start; }
}


.tuning-card .tuning-card-title { font-size: clamp(1.45rem, 2.2vw, 1.8rem); font-weight: 700; line-hei