:root {
  --bg: #16181d;
  --panel: #1e2129;
  --panel-2: #262a34;
  --line: #333844;
  --text: #e6e8ee;
  --muted: #9aa1b1;
  --accent: #7c9cff;
  --accent-2: #57d1a0;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: radial-gradient(1200px 600px at 50% -10%, #23283a 0%, var(--bg) 60%);
  color: var(--text);
  min-height: 100vh;
}
header { text-align: center; padding: 34px 16px 8px; }
h1 { margin: 0; font-size: 30px; letter-spacing: 0.2px; }
.tagline { color: var(--muted); margin: 6px 0 0; }
.app-logo { width: 72px; height: 72px; border-radius: 16px; margin-bottom: 6px; cursor: pointer; }
.help-link { margin: 10px 0 0; font-size: 14px; }
.help-link a { color: var(--accent); text-decoration: none; }
.help-link a:hover { text-decoration: underline; }
main { max-width: 920px; margin: 0 auto; padding: 18px 18px 40px; }

.drop {
  border: 2px dashed var(--line);
  border-radius: 14px;
  background: var(--panel);
  padding: 34px 18px;
  text-align: center;
  cursor: pointer;
  transition: border-color .15s, background .15s, transform .05s;
}
.drop:hover { border-color: var(--accent); }
.drop.over { border-color: var(--accent-2); background: var(--panel-2); }
.drop-icon { font-size: 30px; opacity: .7; margin-bottom: 8px; }
.file-name { color: var(--accent-2); margin-top: 10px; font-size: 14px; min-height: 18px; }

.controls { display: flex; align-items: center; gap: 12px; margin: 22px 2px 4px; flex-wrap: wrap; }
.switch { color: var(--muted); font-size: 14px; user-select: none; cursor: pointer; }
.switch input { accent-color: var(--accent); margin-right: 6px; }

h2 { font-size: 16px; color: var(--muted); font-weight: 600; margin: 24px 2px 12px; text-transform: uppercase; letter-spacing: .6px; }

.analysis { }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 10px; }
.stat { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; }
.stat-label { display: block; color: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: .5px; }
.stat-val { font-size: 18px; font-weight: 600; }
.scale { margin-top: 12px; }
.scale-notes, .chords-palette { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.note { background: var(--panel-2); border: 1px solid var(--line); border-radius: 8px; padding: 6px 12px; font-weight: 600; }
.note.tonic { border-color: var(--accent-2); color: var(--accent-2); }
.deg { background: var(--panel-2); border: 1px solid var(--line); border-radius: 8px; padding: 6px 10px; font-size: 14px; }
.deg b { color: var(--accent); margin-right: 3px; }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 14px; align-items: start; }
.card {
  display: flex; flex-direction: column;
  background: var(--panel); border: 1px solid var(--line); border-radius: 12px;
  padding: 14px 16px 16px; cursor: pointer; transition: border-color .15s, transform .05s, box-shadow .15s;
}
.card:hover { border-color: var(--accent); }
.card.playing { border-color: var(--accent-2); box-shadow: 0 0 0 1px var(--accent-2) inset; }
.card:active { transform: scale(.997); }
.card-head { display: flex; justify-content: space-between; align-items: baseline; }
.card-title { font-size: 16px; font-weight: 700; }
.card-dl { color: var(--muted); font-size: 13px; }
.card:hover .card-dl { color: var(--accent); }
.card-hint { color: var(--muted); font-size: 13px; margin: 2px 0 12px; }
.chords { display: flex; flex-wrap: wrap; align-items: stretch; gap: 6px; }
.chord {
  flex: 1 1 0; min-width: 64px;
  background: var(--panel-2); border: 1px solid var(--line); border-radius: 8px;
  padding: 7px 8px; text-align: center;
}
.chord-name { font-size: 16px; font-weight: 700; }
.chord-roman { color: var(--accent); font-size: 11px; margin-top: 1px; }
.chord-notes { color: var(--muted); font-size: 10px; margin-top: 5px; letter-spacing: .2px; }
.roll {
  width: 100%; height: 96px; display: block; margin-top: 12px;
  background: #14161c; border: 1px solid var(--line); border-radius: 8px;
}
.error { color: #ff8a8a; background: var(--panel); border: 1px solid #543; border-radius: 10px; padding: 14px; }

footer { text-align: center; color: var(--muted); font-size: 12px; padding: 8px 16px 30px; }
footer p { margin: 4px 0; }
.footer-links a { color: var(--muted); text-decoration: none; }
.footer-links a:hover { color: var(--accent); }
.footer-promo { margin-top: 8px; font-size: 12px; color: var(--muted); }
.footer-promo a { color: var(--accent); text-decoration: none; }
.footer-promo a:hover { text-decoration: underline; }

/* Ad slots */
.ad-slot { margin: 26px auto 4px; text-align: center; min-height: 90px; }
.ad-placeholder {
  display: flex; align-items: center; justify-content: center;
  min-height: 90px; color: var(--muted); font-size: 12px; letter-spacing: .5px;
  border: 1px dashed var(--line); border-radius: 10px; background: rgba(255,255,255,0.015);
}

/* Tutorial / privacy prose pages */
.prose { line-height: 1.6; }
.prose h3 { margin: 0 0 6px; font-size: 17px; }
.prose p { color: #cfd3dd; margin: 8px 0; }
.prose a { color: var(--accent); text-decoration: none; }
.prose a:hover { text-decoration: underline; }
.prose ul { color: #cfd3dd; }
.steps { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.steps > li { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 14px 18px; }
.tip { background: var(--panel-2); border: 1px solid var(--line); border-left: 3px solid var(--accent-2); border-radius: 8px; padding: 12px 16px; margin: 20px 0; color: #cfd3dd; }
.center { text-align: center; }
.btn { display: inline-block; margin-top: 10px; padding: 9px 18px; background: var(--panel-2); border: 1px solid var(--line); border-radius: 8px; color: var(--text) !important; text-decoration: none; }
.btn:hover { border-color: var(--accent); }

/* Tutorial video */
.app-logo-link { display: contents; }

/* Tutorial video */
.tutorial-video { display: block; width: 100%; max-width: 720px; margin: 0 auto 28px; border-radius: 12px; border: 1px solid var(--line); }

/* Cross-promo */
.cross-promo { text-align: center; margin: 28px 0 8px; color: var(--muted); font-size: 14px; }
.meditation-link { color: #a8886a; text-decoration: none; font-weight: 500; }
.meditation-link:hover { text-decoration: underline; color: #c87941; }