:root{color-scheme:dark;--bg:#0c0c0e;--surface:#151517;--hover:#1d1d20;--active:#27272b;--line:#ffffff10;--text:#f2f1ee;--muted:#8d8d94;--focus:#8ab4ff;--radius:20px;font-family:ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;color:var(--text);background:var(--bg);font-synthesis:none;-webkit-font-smoothing:antialiased;-webkit-text-size-adjust:100%}
*{box-sizing:border-box}
body{margin:0;min-height:100svh;background:var(--bg)}
button,input{font:inherit;color:inherit}
button{cursor:pointer;-webkit-tap-highlight-color:transparent;touch-action:manipulation;transition:background .15s,color .15s,transform .15s,opacity .15s}
button:active{transform:scale(.97)}
button:disabled{cursor:wait;opacity:.6}
[hidden]{display:none!important}
:is(button,a,input):focus-visible{outline:2px solid var(--focus);outline-offset:3px}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}

.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:max(14px,env(safe-area-inset-top)) 18px 6px}
.wordmark{display:flex;align-items:center;gap:10px;font-size:15px;font-weight:600;letter-spacing:-.2px;color:inherit;text-decoration:none;min-height:44px}
.brand-mark{width:28px;height:28px;display:block}
.brand-mark svg{width:100%;height:100%}
.pill{min-height:44px;border:0;border-radius:999px;padding:0 20px;background:var(--surface);font-size:14px;font-weight:500}
.pill:hover{background:var(--hover)}
.chip{min-height:44px;border:0;border-radius:999px;padding:0 16px;background:var(--surface);font-size:14px;color:var(--muted)}
.chip:hover{color:var(--text);background:var(--hover)}

main{display:flex;flex-direction:column;align-items:center;gap:16px;padding:0 14px max(28px,env(safe-area-inset-bottom))}
.stage{position:sticky;top:0;z-index:2;width:100%;display:flex;flex-direction:column;align-items:center;gap:12px;padding:10px 0 14px;background:linear-gradient(var(--bg) 85%,transparent)}
.preview{width:min(240px,56vw,34svh);aspect-ratio:1;border-radius:32px;overflow:hidden}
.preview svg{width:100%;height:100%;display:block}
body[data-backdrop=night] .preview{box-shadow:inset 0 0 0 1px var(--line)}
body[data-backdrop=transparent] .preview{background-color:#18181b;background-image:conic-gradient(#222226 25%,transparent 0 50%,#222226 0 75%,transparent 0);background-size:20px 20px}
.stage-actions{display:flex;gap:8px}

.panel{width:min(100%,560px);background:var(--surface);border-radius:28px;padding:8px}
.tabs{display:grid;grid-template-columns:repeat(4,1fr);gap:4px;padding:4px;background:var(--bg);border-radius:20px}
.tabs button{min-height:44px;border:0;border-radius:16px;background:none;font-size:14px;font-weight:500;color:var(--muted)}
.tabs button:hover{color:var(--text)}
.tabs button[aria-selected=true]{background:var(--active);color:var(--text)}
form{padding:16px 8px 8px}
.pane{display:grid;gap:18px}
.pane-head{display:flex;align-items:center;justify-content:space-between;gap:12px}
fieldset{border:0;margin:0;padding:0;min-width:0}
legend{padding:0;margin-bottom:12px;font-size:13px;font-weight:500;color:var(--muted)}

.tile-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.tile{aspect-ratio:1;border:0;border-radius:18px;background:none;padding:0;display:grid;place-items:center;overflow:hidden}
.tile svg{width:100%;height:100%;pointer-events:none;border-radius:18px}
.tile:hover{background:var(--hover)}
.tile[aria-pressed=true]{box-shadow:0 0 0 2px var(--text)}
.more-button{min-height:48px;border:0;border-radius:16px;background:var(--hover);font-size:14px;font-weight:500;color:var(--muted)}
.more-button:hover{color:var(--text);background:var(--active)}

.switch{display:inline-flex;align-items:center;gap:10px;min-height:44px;cursor:pointer;font-size:14px;color:var(--muted)}
.switch:hover{color:var(--text)}
.switch input{appearance:none;margin:0;width:44px;height:26px;border-radius:999px;background:var(--active);position:relative;cursor:pointer;transition:background .15s}
.switch input::after{content:"";position:absolute;top:4px;left:4px;width:18px;height:18px;border-radius:50%;background:var(--muted);transition:transform .15s,background .15s}
.switch input:checked{background:var(--text)}
.switch input:checked::after{transform:translateX(18px);background:var(--bg)}

.swatch-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(48px,1fr));gap:12px;justify-items:center}
.swatch{width:48px;height:48px;border-radius:50%;border:0;padding:0}
.swatch:hover{transform:scale(1.06)}
.swatch[aria-pressed=true]{outline:2px solid var(--text);outline-offset:3px}
.custom-swatch{background:conic-gradient(#e8364a,#f5a524,#2bb673,#2f86f6,#9466f0,#ef4f9a,#e8364a)}
.custom-swatch[aria-expanded=true]{outline:2px dashed var(--muted);outline-offset:3px}
.custom-swatch.active{outline:2px solid var(--text);outline-offset:3px}
.mixer{display:grid;gap:16px;padding:16px;background:var(--bg);border-radius:22px}
.mixer-head{display:flex;align-items:center;gap:14px}
.mixer-chip{width:56px;height:56px;border-radius:18px;flex-shrink:0;box-shadow:inset 0 0 0 1px var(--line)}
.hex-field{flex:1;display:grid;gap:6px;font-size:12px;color:var(--muted)}
.hex-field input{min-height:48px;width:100%;border:0;border-radius:14px;background:var(--hover);padding:0 14px;font-size:17px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:.5px;text-transform:lowercase}
.hex-field input[aria-invalid=true]{box-shadow:inset 0 0 0 2px #e8364a}
.slider{display:grid;gap:8px;font-size:12px;color:var(--muted)}
.slider input{appearance:none;-webkit-appearance:none;width:100%;height:44px;margin:0;border-radius:999px;background:var(--track);cursor:pointer;touch-action:none}
.slider input::-webkit-slider-thumb{-webkit-appearance:none;box-sizing:border-box;width:44px;height:44px;border-radius:50%;background:transparent;border:4px solid #fff;box-shadow:0 0 0 1px #0006,0 2px 8px #0008}
.slider input::-moz-range-thumb{box-sizing:border-box;width:44px;height:44px;border-radius:50%;background:transparent;border:4px solid #fff;box-shadow:0 0 0 1px #0006,0 2px 8px #0008}
.hue{--track:linear-gradient(90deg,hsl(0 90% 55%),hsl(60 90% 55%),hsl(120 90% 45%),hsl(180 90% 45%),hsl(240 90% 60%),hsl(300 90% 55%),hsl(359 90% 55%))}
.sat{--track:linear-gradient(90deg,hsl(var(--h) 0% var(--l)),hsl(var(--h) 100% var(--l)))}
.lit{--track:linear-gradient(90deg,hsl(var(--h) var(--s) 4%),hsl(var(--h) var(--s) 50%),hsl(var(--h) var(--s) 96%))}
.hint{margin:0;font-size:12px;color:var(--muted)}

.option-row{display:grid;gap:8px}
.option-row.four{grid-template-columns:repeat(4,1fr)}
.option-row.three{grid-template-columns:repeat(3,1fr)}
.option{display:grid;justify-items:center;gap:8px;min-height:44px;border:0;border-radius:18px;background:none;padding:8px 4px 10px;font-size:13px;color:var(--muted)}
.option:hover{background:var(--hover);color:var(--text)}
.option[aria-pressed=true]{background:var(--active);color:var(--text)}
.option .art{display:block;width:100%;max-width:64px;aspect-ratio:1;border-radius:16px;overflow:hidden}
.option .art svg{width:100%;height:100%;display:block}
.art[data-backdrop=paper]{background:#f4f4f2}
.art[data-backdrop=night]{background:#0f1013;box-shadow:inset 0 0 0 1px var(--line)}
.art[data-backdrop=transparent]{background-color:#2a2a2e;background-image:conic-gradient(#3a3a3f 25%,transparent 0 50%,#3a3a3f 0 75%,transparent 0);background-size:12px 12px}

.light-pad{display:grid;grid-template-columns:repeat(2,1fr);gap:8px;width:min(100%,220px);aspect-ratio:2/1.3;transition:opacity .15s}
.light-pad.dormant{opacity:.45}
.light-pad.dormant:hover,.light-pad.dormant:focus-within{opacity:1}
.light{position:relative;border:0;border-radius:16px;background:var(--hover);min-height:48px}
.light::before{content:"";position:absolute;width:14px;height:14px;border-radius:50%;background:var(--muted);box-shadow:0 0 0 0 #fff0}
.light[data-corner=NW]::before{top:12px;left:12px}
.light[data-corner=NE]::before{top:12px;right:12px}
.light[data-corner=SW]::before{bottom:12px;left:12px}
.light[data-corner=SE]::before{bottom:12px;right:12px}
.light:hover{background:var(--active)}
.light[aria-pressed=true]::before{background:#fff;box-shadow:0 0 18px 6px #fff6}
.dormant .light[aria-pressed=true]::before{background:var(--muted);box-shadow:none}

.export-row{position:sticky;bottom:max(12px,env(safe-area-inset-bottom));z-index:2;display:flex;gap:10px;width:min(100%,560px)}
.export-row .pill{min-height:52px;box-shadow:0 10px 30px #000a}
.primary{flex:1;background:var(--text);color:#111;font-weight:600}
.primary:hover{background:#fff}
.export-row .pill:not(.primary){background:var(--active)}
#status{margin:0;min-height:0;font-size:13px;color:var(--muted);text-align:center}
.fineprint{margin:8px 0 0;max-width:560px;font-size:12px;line-height:1.5;color:#6c6c73;text-align:center}
noscript{display:block;padding:20px;text-align:center}

@media(min-width:560px){.tile-grid{grid-template-columns:repeat(6,1fr)}.preview{width:min(300px,34svh)}main{gap:20px}.panel{padding:10px}form{padding:20px 12px 12px}}
@media(min-width:960px){
  .topbar{padding:24px 48px}
  main{display:grid;grid-template-columns:minmax(0,1fr) 520px;grid-template-areas:"stage panel" "stage export" "stage status" "stage fineprint";align-items:start;justify-content:center;column-gap:56px;row-gap:16px;max-width:1200px;margin:0 auto;padding:24px 48px 56px}
  .stage{grid-area:stage;top:24px;background:none;padding:0}
  .preview{width:min(440px,100%)}
  .panel{grid-area:panel;width:100%}
  .export-row{grid-area:export;position:static;width:100%}
  .export-row .pill{box-shadow:none}
  #status{grid-area:status}
  .fineprint{grid-area:fineprint}
}
@media(prefers-reduced-motion:reduce){*{transition:none!important}button:active{transform:none}}