:root {
  color-scheme: dark;
  --ink: #f8f3ff;
  --muted: #afa6c8;
  --panel: rgba(27, 20, 49, .88);
  --line: rgba(255, 255, 255, .11);
  --violet: #9f7aea;
  --pink: #ff73c7;
  --cyan: #63e6ff;
  --gold: #ffd166;
}

* { box-sizing: border-box; }

html { min-height: 100%; background: #0a0714; }

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  font-family: ui-rounded, "SF Pro Rounded", "Avenir Next", system-ui, sans-serif;
  background:
    radial-gradient(circle at 12% 8%, rgba(159, 122, 234, .27), transparent 32rem),
    radial-gradient(circle at 88% 12%, rgba(255, 115, 199, .18), transparent 28rem),
    linear-gradient(145deg, #0a0714 0%, #15102a 52%, #090714 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .16;
  background-image: linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: linear-gradient(to bottom, black, transparent 75%);
}

button, input { font: inherit; }

button {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: .72rem 1rem;
  background: rgba(255,255,255,.06);
  color: var(--ink);
  font-weight: 750;
  cursor: pointer;
  transition: transform .16s ease, border-color .16s ease, background .16s ease;
}

button:hover { transform: translateY(-1px); border-color: rgba(255,255,255,.28); background: rgba(255,255,255,.1); }
button:focus-visible, input:focus-visible, a:focus-visible { outline: 3px solid var(--cyan); outline-offset: 3px; }

.shell { width: min(1180px, calc(100% - 28px)); margin: 0 auto; padding: 42px 0 32px; position: relative; }
.hero { display: flex; justify-content: space-between; align-items: end; gap: 24px; margin-bottom: 24px; }
.eyebrow { margin: 0 0 7px; color: var(--cyan); font-size: .76rem; font-weight: 850; letter-spacing: .16em; text-transform: uppercase; }
h1 { margin: 0; font-size: clamp(3rem, 8vw, 6.6rem); line-height: .86; letter-spacing: -.065em; background: linear-gradient(115deg, #fff 12%, #d6c4ff 46%, #ff90d2 80%); color: transparent; background-clip: text; }
.dek { max-width: 650px; margin: 16px 0 0; color: var(--muted); font-size: clamp(1rem, 2vw, 1.18rem); }
.score-card { min-width: 180px; padding: 18px 20px; border: 1px solid var(--line); border-radius: 20px; background: linear-gradient(145deg, rgba(255,255,255,.09), rgba(255,255,255,.035)); box-shadow: 0 20px 60px rgba(0,0,0,.26); }
.score-card span, .score-card small { display: block; color: var(--muted); }
.score-card strong { display: block; margin: 2px 0; font-size: 2.2rem; color: var(--gold); }

.transport { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; padding: 14px; border: 1px solid var(--line); border-radius: 18px 18px 0 0; background: rgba(13, 10, 27, .74); backdrop-filter: blur(16px); }
.transport .primary { min-width: 112px; background: linear-gradient(135deg, #8d66ee, #d65cbb); border-color: transparent; box-shadow: 0 8px 26px rgba(159,122,234,.22); }
.transport .primary.playing { background: linear-gradient(135deg, #f05fbd, #7f64ed); }
.tempo, .swing { display: grid; grid-template-columns: auto minmax(90px, 140px) 66px; align-items: center; gap: 9px; margin-left: auto; color: var(--muted); font-size: .82rem; font-weight: 700; }
.swing { margin-left: 0; }
input[type="range"] { accent-color: var(--pink); width: 100%; }
output { color: var(--ink); font-variant-numeric: tabular-nums; }

.studio { padding: 16px; overflow-x: auto; border: 1px solid var(--line); border-top: 0; border-radius: 0 0 20px 20px; background: var(--panel); box-shadow: 0 28px 80px rgba(0,0,0,.32); }
.step-head, .track, .playhead-row { min-width: 850px; display: grid; grid-template-columns: 128px 1fr; gap: 10px; align-items: center; }
.numbers, .steps, .playhead { display: grid; grid-template-columns: repeat(16, minmax(32px, 1fr)); gap: 6px; }
.numbers span { text-align: center; padding: 3px 0 7px; color: #766e8c; font-size: .7rem; font-weight: 800; }
.numbers span.downbeat { color: #c3b7df; }
.tracks { display: grid; gap: 9px; }
.track-label { display: grid; grid-template-columns: 38px 1fr; gap: 9px; align-items: center; width: 100%; padding: 8px; text-align: left; }
.track-0 { --track: #ff73c7; }
.track-1 { --track: #ffd166; }
.track-2 { --track: #9f7aea; }
.track-3 { --track: #63e6ff; }
.track-label.muted { opacity: .48; }
.track-dot { width: 29px; height: 29px; display: grid; place-items: center; border-radius: 9px; background: var(--track); color: #120d24; font-size: .72rem; }
.track-label small { display: block; color: var(--muted); font-size: .68rem; font-weight: 650; }
.step { aspect-ratio: 1; min-height: 34px; padding: 0; border-radius: 9px; border-color: rgba(255,255,255,.07); background: rgba(255,255,255,.035); box-shadow: inset 0 -4px 10px rgba(0,0,0,.15); }
.step:nth-child(4n+1) { border-left-color: rgba(255,255,255,.25); }
.step.active { background: var(--track); border-color: color-mix(in srgb, var(--track), white 24%); box-shadow: 0 0 20px color-mix(in srgb, var(--track), transparent 62%), inset 0 0 0 2px rgba(255,255,255,.25); }
.step.beating { transform: scale(.82); filter: brightness(1.35); }
.playhead-row { margin-top: 9px; }
.playhead i { height: 4px; border-radius: 9px; background: rgba(255,255,255,.055); transition: background .06s; }
.playhead i.current { background: var(--cyan); box-shadow: 0 0 12px var(--cyan); }

.footer-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 18px; }
.footer-grid article { padding: 17px 18px; border: 1px solid var(--line); border-radius: 16px; background: rgba(255,255,255,.035); }
.footer-grid h2 { margin: 0 0 5px; color: #e5d9ff; font-size: .82rem; letter-spacing: .08em; text-transform: uppercase; }
.footer-grid p { margin: 0; color: var(--muted); font-size: .86rem; line-height: 1.5; }
kbd { padding: .08rem .35rem; border: 1px solid var(--line); border-radius: 5px; background: rgba(255,255,255,.08); color: var(--ink); }
.credit { margin: 20px auto 0; max-width: 840px; text-align: center; color: #7f7696; font-size: .72rem; }
a { color: #bfa6ff; }
.toast { position: fixed; left: 50%; bottom: 22px; transform: translate(-50%, 18px); padding: 10px 16px; border: 1px solid rgba(255,255,255,.18); border-radius: 999px; background: #251a42; color: white; font-weight: 750; opacity: 0; pointer-events: none; transition: .2s ease; }
.toast.show { opacity: 1; transform: translate(-50%, 0); }

@media (max-width: 850px) {
  .shell { padding-top: 28px; }
  .hero { align-items: start; }
  .score-card { min-width: 145px; }
  .tempo { margin-left: 0; }
  .footer-grid { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .hero { display: grid; }
  .score-card { width: 100%; display: grid; grid-template-columns: 1fr auto; align-items: center; }
  .score-card small { grid-column: 1 / -1; }
  .transport > button { flex: 1; }
  .tempo, .swing { width: 100%; grid-template-columns: 48px 1fr 65px; }
}

@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; transition-duration: .01ms !important; } }