:root{color-scheme:dark;--bg:#080b10;--panel:#151b24;--line:rgba(255,255,255,.1);--text:#f5f7fa;--muted:#aab4c2;--lime:#c8ff45;--cyan:#59e4ff;--shadow:rgba(0,0,0,.35)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-width:320px;min-height:100vh;background:radial-gradient(circle at 50% 8%,rgba(89,228,255,.12),transparent 28rem),radial-gradient(circle at 20% 35%,rgba(200,255,69,.07),transparent 24rem),var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.6}button,select,input,a{-webkit-tap-highlight-color:transparent}.site-nav,.site-footer,.content{width:min(100% - 2rem,900px);margin-inline:auto}.site-nav{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding-block:1rem}.site-name{color:var(--text);font-weight:850;text-decoration:none}.site-links{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:.65rem 1rem}.site-links a{color:var(--muted);font-size:.86rem;text-decoration:none}.site-links a:hover,.site-links a[aria-current=page]{color:var(--cyan)}
.hero{min-height:calc(100svh - 68px);padding:1.25rem 1rem 3rem}.metronome-shell{width:min(100%,900px);margin:auto;text-align:center}.eyebrow{margin:0 0 .35rem;color:var(--lime);font-size:.75rem;font-weight:800;letter-spacing:.18em;text-transform:uppercase}h1{margin:0;font-size:clamp(2.3rem,7vw,4.8rem);line-height:1;letter-spacing:-.05em}.subtitle{max-width:46rem;margin:.75rem auto 1.35rem;color:var(--muted);font-size:clamp(1rem,2.5vw,1.18rem)}
.metronome-card,.tap-panel,.panel{border:1px solid var(--line);border-radius:1.3rem;background:rgba(21,27,36,.94);box-shadow:0 1.25rem 4rem var(--shadow)}.metronome-card{padding:clamp(1rem,3vw,1.6rem)}.tempo-readout{display:grid;justify-items:center}.tempo-readout>label,.unit{color:var(--muted);font-size:.76rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase}.tempo-control{display:flex;align-items:center;justify-content:center;gap:.6rem;margin:.2rem 0}.tempo-control input{width:clamp(7rem,25vw,10rem);border:0;background:transparent;color:var(--lime);font:900 clamp(3rem,10vw,5.8rem)/1 ui-sans-serif,system-ui;text-align:center;-moz-appearance:textfield}.tempo-control input::-webkit-inner-spin-button{appearance:none}.step-button{width:3rem;height:3rem;border:1px solid var(--line);border-radius:50%;background:rgba(255,255,255,.04);color:var(--text);font-size:1.6rem;cursor:pointer}.beat-display{display:flex;justify-content:center;gap:.65rem;min-height:1.2rem;margin:1rem 0}.beat-dot{width:.7rem;height:.7rem;border-radius:50%;background:rgba(255,255,255,.18);transition:transform 70ms ease,background 70ms ease}.beat-dot:first-child{outline:1px solid rgba(200,255,69,.6);outline-offset:3px}.beat-dot.is-active{transform:scale(1.55);background:var(--cyan)}.beat-dot:first-child.is-active{background:var(--lime)}
.play-button{display:flex;align-items:center;justify-content:center;gap:.65rem;width:min(100%,25rem);min-height:4rem;margin:0 auto 1.2rem;border:1px solid rgba(200,255,69,.7);border-radius:1rem;background:linear-gradient(145deg,#d8ff74,#9fd62e);color:#0a0e08;font:850 1rem/1 ui-sans-serif,system-ui;cursor:pointer}.play-button.is-playing{background:transparent;color:var(--lime)}.settings-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:.75rem;text-align:left}.settings-grid label,.volume-control{display:grid;gap:.35rem;color:var(--muted);font-size:.75rem;font-weight:800;letter-spacing:.06em;text-transform:uppercase}.settings-grid select{width:100%;min-height:2.9rem;border:1px solid var(--line);border-radius:.7rem;background:#0d1219;color:var(--text);padding:.6rem;font:700 .88rem/1.2 ui-sans-serif,system-ui}.volume-control{grid-template-columns:auto 1fr;align-items:center;gap:1rem;margin-top:1rem;text-align:left}.volume-control input{width:100%;accent-color:var(--lime)}
.tap-panel{display:grid;grid-template-columns:minmax(0,1.2fr) auto;gap:1rem;align-items:center;margin-top:1rem;padding:clamp(1rem,3vw,1.6rem);text-align:left}.tap-copy h2{margin:.1rem 0 .4rem}.tap-copy p:last-child{margin:0;color:var(--muted)}.tap-button{display:grid;place-items:center;width:8rem;aspect-ratio:1;border:1px solid rgba(89,228,255,.7);border-radius:50%;background:linear-gradient(145deg,#78ebff,#36bdd8);color:#071014;cursor:pointer;touch-action:manipulation;user-select:none}.tap-button:active,.tap-button.is-tapping{transform:scale(.96)}.tap-main{display:block;font-size:1.9rem;font-weight:900;line-height:1}.tap-hint{display:block;margin-top:.35rem;font-size:.58rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase}.results{grid-column:1/-1;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.7rem}.metric{display:grid;justify-items:center;padding:.8rem;border:1px solid var(--line);border-radius:.8rem;background:rgba(255,255,255,.025)}.metric-label{color:var(--muted);font-size:.68rem;font-weight:800;letter-spacing:.1em;text-transform:uppercase}.metric-value{color:var(--cyan);font-size:1.9rem;font-variant-numeric:tabular-nums}.interval-block{grid-column:1/-1}.interval-block h3{margin:.2rem 0 .5rem}.intervals{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:.45rem;margin:0;padding:0;list-style:none}.intervals li{padding:.55rem .25rem;border:1px solid var(--line);border-radius:.55rem;color:var(--muted);font-size:.82rem;text-align:center}.reset-button{display:block;margin:.75rem auto 0;padding:.6rem .9rem;border:1px solid var(--line);border-radius:.65rem;background:transparent;color:var(--text);font:700 .85rem/1 ui-sans-serif,system-ui;cursor:pointer}
.content{padding:3rem 0 5rem}.panel{padding:clamp(1.15rem,4vw,2rem)}.panel+.panel{margin-top:1rem}h2{margin:0 0 .75rem;font-size:clamp(1.25rem,4vw,1.65rem);letter-spacing:-.025em}h3{margin:1.35rem 0 .35rem;font-size:1.05rem}.panel p,.panel li{color:var(--muted)}.panel p{margin:.55rem 0}.instructions{display:grid;gap:.55rem;margin:0;padding:0;list-style:none;counter-reset:steps}.instructions li{counter-increment:steps;display:grid;grid-template-columns:2rem 1fr;gap:.7rem}.instructions li:before{content:counter(steps);display:grid;place-items:center;width:1.8rem;height:1.8rem;border-radius:50%;background:rgba(200,255,69,.12);color:var(--lime);font-size:.8rem;font-weight:850}.source-note{font-size:.85rem}.source-note a,a{color:var(--cyan)}code{color:var(--lime)}.privacy{text-align:center;color:var(--muted);font-size:.86rem}.site-footer{display:flex;flex-wrap:wrap;justify-content:space-between;gap:.75rem 1.5rem;padding-block:1.5rem 2rem;border-top:1px solid var(--line);color:var(--muted);font-size:.85rem}.site-footer p{margin:0}button:focus-visible,select:focus-visible,input:focus-visible,a:focus-visible{outline:3px solid var(--cyan);outline-offset:4px}
@media(max-width:720px){.settings-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.tap-panel{grid-template-columns:1fr}.tap-copy{text-align:center}.tap-button{margin:auto}.intervals{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:540px){.site-nav{align-items:flex-start}.site-links{gap:.5rem .75rem}.hero{padding-block:1rem 2.5rem}.settings-grid{grid-template-columns:1fr}.tempo-control input{width:7rem}.tap-button{width:7.5rem}.results{grid-template-columns:1fr 1fr}.intervals{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important}}