:root { color-scheme: dark; }
body { margin: 0; font-family: system-ui, sans-serif; background: #0d1016; color: #e6e9ef; line-height: 1.5; }
header, main, footer { max-width: 960px; margin: 0 auto; padding: 1rem; }
h1 { font-size: 1.6rem; margin-bottom: 0.25rem; }
h2 { font-size: 1.2rem; margin-top: 2rem; }
section { border-top: 1px solid #252c38; padding-bottom: 0.5rem; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 0.75rem; }
label { display: flex; flex-direction: column; font-size: 0.85rem; gap: 0.25rem; color: #aab3c2; }
select, input, button { font: inherit; padding: 0.45rem 0.6rem; border-radius: 6px; border: 1px solid #333c4c; background: #171c26; color: #e6e9ef; }
button { cursor: pointer; background: #1f7a62; border-color: #1f7a62; font-weight: 600; }
button:disabled, select:disabled { opacity: 0.5; cursor: not-allowed; }
canvas { width: 100%; height: auto; border-radius: 8px; border: 1px solid #252c38; margin-top: 0.5rem; }
.buttons { display: flex; flex-wrap: wrap; gap: 0.75rem; align-items: flex-end; margin: 0.75rem 0; }
.chords { font-family: ui-monospace, monospace; color: #ffd166; margin-bottom: 0; }
a { color: #6cb6ff; }
footer { border-top: 1px solid #252c38; margin-top: 2rem; color: #aab3c2; }