/* EKU STUDIO · GEN — procedural music workstation */

:root{
  --bg:#0c0b10;
  --bg-2:#141220;
  --panel:#171523;
  --panel-2:#1d1a2b;
  --line:#2e2a41;
  --ink:#efeaf5;
  --ink-dim:#a49dbb;
  --ink-faint:#6e6885;
  --accent:#e0b153;
  --accent-2:#7ad0c4;
  --accent-ink:#14100a;
  --radius:10px;
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
  --sans:"Helvetica Neue",Helvetica,Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}

html[data-genre="lofi"]     { --accent:#e0b153; --accent-2:#9c86e8; --accent-ink:#17120a; }
html[data-genre="keion"]    { --accent:#ff7fa8; --accent-2:#7fd3ff; --accent-ink:#21101a; }
html[data-genre="postpunk"] { --accent:#8f9bff; --accent-2:#ff6b6b; --accent-ink:#0d1022; }
html[data-genre="citypop"]  { --accent:#22c7c0; --accent-2:#ffb14e; --accent-ink:#062019; }
html[data-genre="synthwave"]{ --accent:#ff4fd0; --accent-2:#5ce1ff; --accent-ink:#210a1c; }
html[data-genre="ambient"]  { --accent:#9fd8c0; --accent-2:#8fb8ff; --accent-ink:#0a1a14; }

*{box-sizing:border-box}
html,body{margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:
    radial-gradient(1200px 600px at 12% -10%, color-mix(in srgb, var(--accent) 12%, transparent), transparent 60%),
    radial-gradient(900px 500px at 100% 0%, color-mix(in srgb, var(--accent-2) 9%, transparent), transparent 55%),
    var(--bg);
  color:var(--ink);
  font-family:var(--sans);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  transition:background .5s ease;
  overflow-x:hidden;
}
a{color:inherit}
h1,h2,h3{line-height:1.15;margin:0}
.skip{position:absolute;left:-999px}
.skip:focus{left:12px;top:12px;z-index:99;background:var(--accent);color:var(--accent-ink);padding:8px 14px;border-radius:6px}

/* ---------- header ---------- */
.top{
  position:sticky;top:0;z-index:20;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:14px clamp(16px,4vw,48px);
  background:color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.brand{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
.brand-mark{color:var(--accent);font-size:18px;transform:translateY(1px)}
.brand-name{font-family:var(--mono);font-weight:700;letter-spacing:.14em;font-size:15px}
.brand-name b{color:var(--accent)}
.brand-sub{font-size:11px;color:var(--ink-faint);letter-spacing:.16em;text-transform:uppercase}
.top-nav{display:flex;gap:18px;font-size:12.5px;letter-spacing:.08em;color:var(--ink-dim)}
.top-nav a{text-decoration:none;padding-bottom:2px;border-bottom:1px solid transparent}
.top-nav a:hover{color:var(--accent);border-color:var(--accent)}

main{padding:0 clamp(16px,4vw,48px) 72px;max-width:1240px;margin:0 auto}

/* ---------- hero ---------- */
.hero{padding:clamp(36px,7vw,84px) 0 clamp(28px,4vw,48px);border-bottom:1px solid var(--line)}
.eyebrow{font-family:var(--mono);font-size:11.5px;letter-spacing:.26em;color:var(--accent);margin:0 0 18px}
.hero h1{
  font-size:clamp(34px,6.4vw,74px);font-weight:800;letter-spacing:-.02em;max-width:16em;
}
.hero h1 em{font-style:normal;color:var(--accent);position:relative;white-space:nowrap}
.hero h1 em::after{
  content:"";position:absolute;left:0;right:0;bottom:.06em;height:.14em;
  background:linear-gradient(90deg,var(--accent),var(--accent-2));opacity:.5;border-radius:2px;
}
.lede{max-width:60ch;color:var(--ink-dim);margin:22px 0 0;font-size:clamp(14px,1.6vw,16.5px)}
.hero-stats{list-style:none;display:flex;flex-wrap:wrap;gap:10px 34px;margin:34px 0 0;padding:0}
.hero-stats li{display:flex;flex-direction:column;gap:2px}
.hero-stats b{font-family:var(--mono);font-size:20px;color:var(--ink)}
.hero-stats span{font-size:11.5px;letter-spacing:.14em;color:var(--ink-faint);text-transform:uppercase}

/* ---------- section heads ---------- */
.sec-head{display:flex;align-items:baseline;justify-content:space-between;gap:20px;flex-wrap:wrap;margin:clamp(40px,6vw,64px) 0 22px}
.sec-head h2{font-size:clamp(19px,2.6vw,26px);letter-spacing:-.01em}
.sec-head h2::before{content:"— ";color:var(--accent);font-family:var(--mono)}
.sec-head p{margin:0;color:var(--ink-faint);font-size:13px;font-family:var(--mono)}

/* ---------- genre grid ---------- */
.genre-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(196px,1fr));gap:12px}
.gcard{
  text-align:left;cursor:pointer;position:relative;overflow:hidden;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:16px 16px 14px;color:var(--ink);font:inherit;
  transition:transform .18s ease,border-color .18s ease,background .18s ease;
}
.gcard::before{
  content:"";position:absolute;inset:0 auto 0 0;width:3px;background:var(--gc,var(--accent));
  transform:scaleY(.18);transform-origin:top;transition:transform .28s ease;
}
.gcard:hover{transform:translateY(-3px);border-color:color-mix(in srgb, var(--gc,var(--accent)) 55%, var(--line))}
.gcard:hover::before{transform:scaleY(1)}
.gcard[aria-pressed="true"]{background:var(--panel-2);border-color:var(--gc,var(--accent))}
.gcard[aria-pressed="true"]::before{transform:scaleY(1)}
.gcard-en{font-family:var(--mono);font-size:10.5px;letter-spacing:.2em;color:var(--gc,var(--accent));text-transform:uppercase}
.gcard-name{display:block;font-size:17px;font-weight:700;margin:7px 0 5px}
.gcard-desc{display:block;font-size:12.3px;color:var(--ink-dim);min-height:2.9em}
.gcard-meta{display:flex;justify-content:space-between;gap:8px;margin-top:11px;font-family:var(--mono);font-size:10.5px;color:var(--ink-faint)}
.gcard-live{color:var(--gc,var(--accent))}

/* ---------- deck ---------- */
.deck{
  display:grid;grid-template-columns:minmax(230px,300px) 1fr;gap:clamp(18px,3vw,34px);
  background:linear-gradient(180deg,var(--panel),color-mix(in srgb,var(--panel) 70%, var(--bg)));
  border:1px solid var(--line);border-radius:14px;padding:clamp(16px,2.6vw,28px);
}
.deck-left{display:flex;flex-direction:column;align-items:center;gap:16px}
.platter{
  position:relative;width:100%;max-width:272px;aspect-ratio:1;
  background:radial-gradient(circle at 50% 50%,#1b1826 0 62%,#121019 62% 100%);
  border-radius:50%;border:1px solid var(--line);
  display:grid;place-items:center;
  box-shadow:inset 0 0 40px rgba(0,0,0,.6);
}
.disc{
  width:88%;aspect-ratio:1;border-radius:50%;
  background:radial-gradient(circle at 50% 50%, #0b0a0f 0 30%, #15131d 30% 100%);
  border:1px solid #2a2638;display:grid;place-items:center;
  animation:spin 6s linear infinite;animation-play-state:paused;
}
.disc.spinning{animation-play-state:running}
@keyframes spin{to{transform:rotate(360deg)}}
.grooves{
  position:absolute;inset:7%;border-radius:50%;
  background:repeating-radial-gradient(circle at 50% 50%, rgba(255,255,255,.045) 0 1px, transparent 1px 4px);
  pointer-events:none;
}
.label{
  position:relative;width:44%;aspect-ratio:1;border-radius:50%;
  background:linear-gradient(140deg,var(--accent),color-mix(in srgb,var(--accent) 35%, var(--accent-2)));
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;
  color:var(--accent-ink);text-align:center;padding:6px;
}
.label-genre{font-family:var(--mono);font-size:11px;font-weight:700;letter-spacing:.1em}
.label-seed{font-family:var(--mono);font-size:8.5px;letter-spacing:.08em;opacity:.75}
.spindle{position:absolute;width:8px;height:8px;border-radius:50%;background:#0a0910;border:1px solid #35304a}
.meter{display:flex;gap:5px;align-items:flex-end;height:26px}
.meter span{width:6px;background:var(--line);border-radius:2px;height:20%;transition:height .1s linear,background .1s linear}
.meter span.on{background:var(--accent)}

.deck-right{display:flex;flex-direction:column;gap:18px;min-width:0}
.transport{display:flex;flex-wrap:wrap;gap:10px}
.btn{
  cursor:pointer;font:inherit;font-size:13.5px;color:var(--ink);
  background:var(--panel-2);border:1px solid var(--line);border-radius:8px;
  padding:11px 17px;display:inline-flex;align-items:center;gap:8px;
  transition:border-color .16s ease,background .16s ease,transform .16s ease;
}
.btn:hover{border-color:var(--accent);transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn.primary{background:var(--accent);color:var(--accent-ink);border-color:transparent;font-weight:700}
.btn.primary:hover{filter:brightness(1.08)}
.btn[disabled]{opacity:.5;cursor:progress;transform:none}
.ico{font-size:11px;line-height:1}

.knobs{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px 20px}
.knob{display:grid;grid-template-columns:1fr auto;align-items:center;gap:6px 10px}
.knob-name{grid-column:1/-1;font-family:var(--mono);font-size:10.5px;letter-spacing:.18em;color:var(--ink-faint);text-transform:uppercase}
input[type=range]{
  -webkit-appearance:none;appearance:none;width:100%;height:4px;border-radius:3px;
  background:linear-gradient(90deg,var(--accent) 0 var(--fill,80%), var(--line) var(--fill,80%) 100%);
  outline:none;cursor:pointer;
}
input[type=range]::-webkit-slider-thumb{
  -webkit-appearance:none;width:15px;height:15px;border-radius:50%;background:var(--ink);
  border:3px solid var(--accent);cursor:grab;
}
input[type=range]::-moz-range-thumb{width:13px;height:13px;border-radius:50%;background:var(--ink);border:3px solid var(--accent)}
output{font-family:var(--mono);font-size:12px;color:var(--ink-dim);min-width:3.5em;text-align:right}
select,input[type=text]{
  grid-column:1/-1;font:inherit;font-family:var(--mono);font-size:12.5px;color:var(--ink);
  background:var(--bg-2);border:1px solid var(--line);border-radius:7px;padding:8px 10px;width:100%;
}
select:focus,input:focus{outline:2px solid color-mix(in srgb,var(--accent) 60%, transparent);outline-offset:1px}

.readout{display:flex;flex-direction:column;gap:10px;background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);padding:14px}
.ro-row{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
.ro-k{font-family:var(--mono);font-size:10px;letter-spacing:.16em;color:var(--ink-faint);text-transform:uppercase}
.ro-v{font-family:var(--mono);font-size:13px;color:var(--ink);margin-right:8px}
.ro-v.big{font-size:17px;font-weight:700;color:var(--accent);letter-spacing:.02em}
.prog{list-style:none;display:flex;flex-wrap:wrap;gap:6px;margin:2px 0 0;padding:0}
.prog li{
  font-family:var(--mono);font-size:11px;padding:3px 9px;border-radius:99px;
  background:var(--panel-2);border:1px solid var(--line);color:var(--ink-dim);
}
.prog li.now{background:var(--accent);color:var(--accent-ink);border-color:transparent;font-weight:700}

.visual{display:flex;flex-direction:column;gap:8px}
canvas{width:100%;display:block;border:1px solid var(--line);border-radius:8px;background:#0a0910}
#wave{opacity:.75}

.structure{display:flex;gap:5px;margin-top:16px;overflow-x:auto;padding-bottom:4px}
.structure .blk{
  flex:1 0 58px;background:var(--panel);border:1px solid var(--line);border-radius:6px;
  padding:7px 8px;font-family:var(--mono);font-size:10px;letter-spacing:.1em;color:var(--ink-faint);
  text-align:center;white-space:nowrap;transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.structure .blk.now{background:var(--accent);color:var(--accent-ink);border-color:transparent;font-weight:700}

/* ---------- about ---------- */
.about-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(232px,1fr));gap:14px}
.about-grid article{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px}
.about-grid h3{font-size:14.5px;margin-bottom:8px}
.about-grid h3::before{content:"◈ ";color:var(--accent)}
.about-grid p{margin:0;font-size:12.8px;color:var(--ink-dim)}

.foot{
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
  border-top:1px solid var(--line);margin-top:24px;padding:18px clamp(16px,4vw,48px) 30px;
  font-family:var(--mono);font-size:11px;color:var(--ink-faint);letter-spacing:.1em;
}

@media (max-width:820px){
  .deck{grid-template-columns:1fr}
  .platter{max-width:216px}
  .top-nav{display:none}
}
@media (min-width:1000px){
  .genre-grid{grid-template-columns:repeat(3,1fr)}
}
@media (prefers-reduced-motion:reduce){
  .disc{animation:none}
  html{scroll-behavior:auto}
}