:root {
  --ink: #151615;
  --paper: #eae6f4;
  --accent: #c5f77d;
  --violet: #dbccfa;
  --light: #f8f7f3;
  --muted: #51504e;
  font-family: "Geist", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper);
}
* { box-sizing: border-box; }
body { margin: 0; }
.wrap { width: min(calc(100% - 3rem), 74rem); margin-inline: auto; }
a { color: inherit; text-underline-offset: .2em; }
a:focus-visible { outline: 2px solid #7041b0; outline-offset: 4px; }
header .wrap, footer, nav, .brand { display: flex; align-items: center; }
header .wrap, footer { justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
header .wrap { min-height: 74px; padding-block: .6rem; }
nav { gap: clamp(.6rem, 3vw, 2rem); flex-wrap: wrap; }
nav a { font-size: .93rem; font-weight: 650; }
header nav a { text-decoration: none; }
header nav a:hover, nav a[aria-current] { text-decoration: underline; }
.brand { gap: .55rem; font-size: 1.3rem; font-weight: 820; letter-spacing: -.04em; text-decoration: none; }
.brand img { border-radius: 10px; }
.nav-cta, .button { border-radius: 999px; text-decoration: none; font-weight: 750; }
.nav-cta { padding: .35rem .9rem; background: var(--ink); color: var(--accent); }
h1, h2, h3 { line-height: 1.05; letter-spacing: -.045em; margin: 0; }
p { margin: .55rem 0 1rem; }
.hero { background: var(--ink); color: var(--light); border-radius: clamp(1.5rem, 6vw, 5rem); }
.hero-layout { display: grid; grid-template-columns: 1.25fr 1fr; align-items: center; gap: clamp(2rem, 5vw, 5rem); padding-block: clamp(3rem, 8vw, 8rem); }
.eyebrow { font-weight: 750; text-transform: uppercase; letter-spacing: .11em; font-size: .77rem; color: var(--accent); margin: 0 0 1.2rem; }
h1 { font-size: clamp(2.7rem, 6.9vw, 6rem); }
h1 em { color: var(--violet); font-style: normal; }
.intro { max-width: 39ch; font-size: clamp(1.06rem, 2vw, 1.3rem); color: #d5d3d0; margin-block: 1.25rem 1.75rem; }
.button { display: inline-flex; align-items: center; justify-content: space-between; gap: 1rem; padding: .7rem 1.2rem; color: var(--ink); background: var(--accent); width: fit-content; }
.button:hover { text-decoration: underline; }
.button.dark { background: var(--ink); color: var(--accent); }
.fretboard { margin: 0; padding: clamp(.9rem, 2.5vw, 1.7rem); border-radius: 1.7rem; background: #262926; border: 1px solid #6a7362; }
.fretboard figcaption { font-size: 1.25rem; font-weight: 750; }
.fretboard .board-instruction { margin: .25rem 0 .8rem; font-size: .9rem; color: #d3d9cd; }
.fret-numbers, .string { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); text-align: center; }
.fret-numbers { color: #d3d9cd; font-size: .75rem; font-weight: 650; }
.strings { background: repeating-linear-gradient(90deg, transparent 0 calc(100% / 6 - 1px), #687061 calc(100% / 6 - 1px) calc(100% / 6)); }
.string { position: relative; align-items: center; height: 2.75rem; }
.string::before { content: ""; position: absolute; inset-inline: 0; height: 1px; background: #a6ab9e; }
.note { position: relative; grid-column: var(--fret); grid-row: 1; justify-self: center; width: min(100%, 2.75rem); height: 2.75rem; border: 0; background: transparent; color: var(--ink); cursor: pointer; font: inherit; font-weight: 800; isolation: isolate; }
.note::before { content: ""; position: absolute; inset: 50% auto auto 50%; transform: translate(-50%, -50%); width: 1.8rem; height: 1.8rem; border-radius: 50%; background: var(--accent); z-index: -1; }
.note:hover::before, .note:focus-visible::before { background: #e5ffba; }
.note.is-playing::before { background: var(--violet); box-shadow: 0 0 0 3px #dbccfa55; }
.board-controls { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem .85rem; margin-top: .8rem; }
.riff-button { min-height: 44px; padding: .35rem .9rem; border-radius: 999px; border: 1px solid var(--accent); background: transparent; color: var(--accent); font: inherit; font-weight: 750; cursor: pointer; }
.riff-button:hover { background: var(--accent); color: var(--ink); }
.fretboard button:focus-visible { outline: 2px solid var(--violet); outline-offset: -2px; }
.riff-notes, .board-status { color: #d3d9cd; font-size: .8rem; }
.board-status:empty { display: none; }
.practice { padding-block: clamp(3rem, 7vw, 6rem); }
.practice h2, .help-band h2 { font-size: clamp(2rem, 4.2vw, 3.7rem); max-width: 18ch; }
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-top: 1.6rem; }
.features article { border-radius: 1.5rem; padding: 1.5rem; background: var(--light); }
.features article:nth-child(2) { background: var(--violet); }
.features h3 { font-size: 1.55rem; }
.features p { margin-bottom: 0; }
.help-band { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1rem; border-radius: 1.75rem; background: var(--accent); padding: clamp(1.5rem, 4vw, 3rem); }
.help-band p { margin-bottom: 0; }
footer.wrap { margin-top: 3rem; padding-block: 1.2rem 2rem; font-size: .9rem; border-top: 1px solid #c8c1d5; }
.detail main { width: min(calc(100% - 2rem), 54rem); background: var(--light); border-radius: clamp(1.25rem, 4vw, 2.75rem); padding: clamp(1.3rem, 6vw, 4.3rem); margin-top: 1rem; }
.detail h1 { font-size: clamp(2.45rem, 7vw, 4.4rem); }
.detail h2 { font-size: 1.45rem; margin-top: 1.6rem; }
.detail .intro { color: var(--muted); }
.detail .contact { padding: 1rem 1.25rem; border-radius: 1rem; background: var(--violet); overflow-wrap: anywhere; }
.contact h2:first-child, .contact p:first-child { margin-top: 0; }
.contact p:last-child { margin-bottom: 0; }
@media (max-width: 700px) {
  .wrap { width: calc(100% - 2rem); }
  .hero-layout, .features { grid-template-columns: 1fr; }
}
@media (max-width: 420px) {
  header .wrap { column-gap: .6rem; }
  header nav { gap: .55rem; }
  header nav a { font-size: .8rem; }
  .nav-cta { padding-inline: .6rem; }
  .brand { font-size: 1.1rem; }
  .brand img { width: 30px; height: 30px; }
}