:root{--bg:#12101a;--a1:#ff3d9a;--a2:#2de2e6;--a3:#ffb627;--panel:rgba(255,255,255,.04);}
body{margin:0;background:var(--bg);color:#eee;font-family:'IBM Plex Mono',monospace;min-height:100vh;transition:background .6s;}
body::before{content:"";position:fixed;inset:0;pointer-events:none;z-index:0;opacity:.5;transition:all .6s}
body[data-decade="60s"]{--a1:#ff6b35;--a2:#c77dff;--a3:#ffd60a;--bg:#1a0f1f}
body[data-decade="60s"]::before{background:repeating-radial-gradient(circle at 30% 20%,rgba(199,125,255,.08) 0 20px,rgba(255,107,53,.06) 20px 40px)}
body[data-decade="70s"]{--a1:#e76f2e;--a2:#d4a373;--a3:#f4d35e;--bg:#1c120b}
body[data-decade="70s"]::before{background:repeating-linear-gradient(92deg,rgba(212,163,115,.06) 0 3px,transparent 3px 11px)}
body[data-decade="80s"]{--a1:#ff3d9a;--a2:#2de2e6;--a3:#ffb627;--bg:#12101a}
body[data-decade="80s"]::before{background:linear-gradient(transparent 60%,rgba(255,61,154,.12)),repeating-linear-gradient(0deg,rgba(45,226,230,.07) 0 1px,transparent 1px 40px),repeating-linear-gradient(90deg,rgba(45,226,230,.07) 0 1px,transparent 1px 40px)}
body[data-decade="90s"]{--a1:#9ef01a;--a2:#f72585;--a3:#4cc9f0;--bg:#121212}
body[data-decade="90s"]::before{background:repeating-conic-gradient(rgba(255,255,255,.025) 0 25%,transparent 0 50%) 0 0/6px 6px}
body[data-decade="00s"]{--a1:#a0c4ff;--a2:#e0e0e0;--a3:#ff7aa2;--bg:#0f1218}
body[data-decade="00s"]::before{background:linear-gradient(160deg,rgba(255,255,255,.08),transparent 30%,rgba(160,196,255,.08) 60%,transparent)}
body[data-decade="10s"]{--a1:#ff9ecd;--a2:#8ae1fc;--a3:#c8f69b;--bg:#16141f}
body[data-decade="10s"]::before{background:radial-gradient(circle at 80% 10%,rgba(255,158,205,.12),transparent 40%),radial-gradient(circle at 10% 90%,rgba(138,225,252,.12),transparent 40%)}
#root{position:relative;z-index:1}
.title{font-family:'Bungee Shade',cursive;color:var(--a1);text-shadow:0 0 18px var(--a1)}
.bungee{font-family:'Bungee',cursive}
.panel{background:var(--panel);border:1px solid rgba(255,255,255,.08);border-radius:14px;backdrop-filter:blur(4px)}
.led{font-family:'Bungee',cursive;color:var(--a2);text-shadow:0 0 8px var(--a2);background:#000;border-radius:8px;padding:4px 12px;letter-spacing:2px}
.btn{border:1px solid rgba(255,255,255,.15);border-radius:10px;padding:6px 12px;background:rgba(255,255,255,.05);transition:all .15s;cursor:pointer}
.btn:hover{border-color:var(--a2);color:var(--a2)}
.btn-hot{background:var(--a1);color:#111;border-color:var(--a1);font-weight:700}
.btn-hot:hover{color:#111;filter:brightness(1.15);box-shadow:0 0 14px var(--a1)}
.cell{width:100%;aspect-ratio:1;border-radius:5px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.05);transition:background .08s}
.cell.beat{background:rgba(255,255,255,.12)}
.cell.on{background:var(--a2);box-shadow:0 0 8px var(--a2)}
.cell.acc{background:var(--a1);box-shadow:0 0 10px var(--a1)}
.cell.now{outline:2px solid var(--a3)}
.light{height:6px;border-radius:3px;background:rgba(255,255,255,.08)}
.light.lit{background:var(--a3);box-shadow:0 0 8px var(--a3)}
.tab{font-family:'Bungee',cursive;padding:10px 6px;border-radius:6px 6px 0 0;background:repeating-linear-gradient(90deg,#222 0 4px,#2a2a2a 4px 8px);color:#888;border-bottom:3px solid transparent}
.tab.active{color:#111;background:var(--a3);border-bottom-color:var(--a1)}
.kit{border:1px solid rgba(255,255,255,.1);border-radius:12px;padding:10px;background:rgba(0,0,0,.25);transition:transform .15s}
.kit:hover{transform:translateY(-2px);border-color:var(--a3)}
.trash:hover{animation:wob .3s infinite}
@keyframes wob{0%,100%{transform:rotate(-12deg)}50%{transform:rotate(12deg)}}
.drop{border:2px dashed rgba(255,255,255,.2);border-radius:14px;transition:all .2s}
.drop.over{border-color:var(--a2);background:rgba(45,226,230,.08)}
input[type=range]{accent-color:var(--a1)}
select,input[type=text],input[type=number]{background:#0005;border:1px solid #fff2;border-radius:6px;padding:2px 6px;color:#eee}
.fadein{animation:fi .5s both}
@keyframes fi{from{opacity:0;transform:translateY(10px)}to{opacity:1}}