:root{color-scheme:light;--bg:#F4E6C8;--surface:#fffaf0;--surface-2:#f3e9d2;--border:#DCC9A3;--text:#6F5F4A;--muted:#8A624A;--accent:#8A624A;--accent-hover:#6F5F4A;--accent-soft:#efe3cb;--on-accent:#F4E6C8;--danger:#b5482f;--shadow:0 1px 3px rgba(111,95,74,.10),0 8px 24px rgba(111,95,74,.08)}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif}
button,input,select{font:inherit}
button{cursor:pointer}
button:disabled{cursor:default;opacity:.45}
button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid var(--accent);outline-offset:3px}
.app{max-width:1120px;margin:auto;padding:28px 24px 22px}
.hero{display:flex;justify-content:space-between;align-items:center;gap:24px;margin-bottom:26px}
.eyebrow{display:flex;align-items:center;gap:9px;margin:0 0 13px;font-size:11px;font-weight:650;letter-spacing:2px}
.spark{font-size:21px;color:var(--accent);line-height:1}
.divider{margin:0 3px;color:var(--muted)}
h1{font-size:clamp(27px,4vw,38px);font-weight:650;letter-spacing:-1.5px;margin:0 0 10px;line-height:1.25}
h1>span{color:var(--accent)}
.intro{font-size:13px;color:var(--muted);margin:0;line-height:1.7}
.hero-note{font-size:10px;letter-spacing:1.8px;color:var(--muted);text-align:right;white-space:nowrap}
.hero-note b{display:block;font-size:11px;letter-spacing:1px;font-weight:500;margin-top:9px;color:var(--accent)}
.workspace{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:18px}
.stage{background:var(--surface-2);border:1px solid var(--border);border-radius:18px;overflow:hidden;color:var(--text);box-shadow:var(--shadow);display:flex;flex-direction:column;min-width:0}
.stage-heading{display:flex;justify-content:space-between;gap:12px;padding:22px 24px 0;font-size:11px;letter-spacing:.6px;color:var(--muted)}
.stage-heading>span:first-child{display:flex;align-items:center;gap:8px;color:var(--text)}
.stage-heading i{width:6px;height:6px;border-radius:50%;background:var(--accent)}
.canvas-wrap{position:relative;height:422px;flex:1;min-height:300px}
canvas{display:block;width:100%;height:100%}
.stage-bottom{display:flex;justify-content:space-between;gap:12px;padding:0 24px 17px;font-size:11px;line-height:1.7;color:var(--muted)}
#status{color:var(--text)}
#progress-text{font-variant-numeric:tabular-nums;color:var(--accent)}
.progress-track{height:3px;background:var(--border)}
.progress-track span{display:block;height:100%;width:0;background:var(--accent)}
.controls{border:1px solid var(--border);border-radius:18px;background:var(--surface);box-shadow:var(--shadow);padding:22px}
.controls-title{display:flex;align-items:center;justify-content:space-between;margin-bottom:23px}
h2{font-size:16px;font-weight:650;margin:0}
.controls-title>span{font-size:10px;color:var(--muted)}
.field-label{display:flex;align-items:center;gap:9px;font-size:12px;font-weight:600}
.field-label span{font-size:9px;letter-spacing:1px;color:var(--muted);font-weight:500}
.order-field{display:flex;align-items:center;gap:8px;background:var(--surface-2);border:1px solid var(--border);border-radius:10px;padding:8px 14px;margin:10px 0}
.order-field select{appearance:none;width:100%;min-width:0;min-height:32px;border:0;background:transparent;color:var(--text);font-size:15px;font-weight:600;line-height:1.5;cursor:pointer}
.order-field select:disabled{cursor:default;opacity:.55}
.order-field option{background:var(--surface);color:var(--text)}
.order-field>span{font-size:12px;color:var(--muted)}
.presets{display:flex;gap:7px}
.presets button{flex:1;background:var(--surface);border:1px solid var(--border);border-radius:7px;font-size:11px;padding:7px 0;color:var(--muted)}
.presets button[aria-pressed="true"]{color:var(--on-accent);background:var(--accent);border-color:var(--accent);font-weight:650}
.field-hint{font-size:10px;color:var(--muted);margin:10px 0 21px;line-height:1.6}
.field-hint b{font-weight:550;color:var(--text)}
.error{font-size:12px;color:var(--danger);line-height:1.7;margin:8px 0}
.speed-heading{display:flex;justify-content:space-between;align-items:center}
output{background:var(--accent-soft);color:var(--accent);padding:3px 7px;border-radius:5px;font-size:11px;font-weight:650;min-width:40px;text-align:center}
input[type="range"]{display:block;accent-color:var(--accent);width:100%;margin:14px 0 8px;cursor:pointer}
.range-caption{display:flex;justify-content:space-between;font-size:9px;color:var(--muted)}
.action-row{display:flex;gap:8px;margin-top:22px}
.button{border:1px solid transparent;border-radius:9px;padding:11px 12px;font-size:12px;font-weight:600;min-height:42px}
.button span[aria-hidden]{font-size:10px;margin-right:5px}
.primary{flex:1;background:var(--accent);color:var(--on-accent)}
.primary:not(:disabled):hover{background:var(--accent-hover)}
.secondary{background:var(--surface-2);color:var(--text);border-color:var(--border)}
.secondary:not(:disabled):hover{background:var(--accent-soft)}
.utility-row{display:flex;justify-content:space-between;gap:10px;margin-top:15px}
.utility-row button{background:none;border:0;font-size:11px;padding:4px 0}
.reset{color:var(--muted)}
.download{color:var(--accent);font-weight:600}
.download-hint{font-size:9px;color:var(--muted);margin:9px 0 21px;line-height:1.6}
.metrics{display:grid;grid-template-columns:1fr 1fr;gap:14px;padding-top:16px;border-top:1px solid var(--border)}
.metrics>div:last-child{grid-column:1/-1;display:flex;align-items:center;justify-content:space-between}
.metrics>div>span{display:block;font-size:10px;color:var(--muted)}
.metrics strong{display:block;font-size:22px;font-weight:600;margin-top:5px;line-height:1.1;font-variant-numeric:tabular-nums}
.metrics>div:last-child strong{font-size:16px;margin:0}
.metrics strong span{font-size:12px;padding-left:3px;color:var(--muted)}
.explainer{display:flex;align-items:center;gap:14px;margin-top:17px;padding:13px 4px 0;border-top:1px solid var(--border)}
.explainer-icon{display:grid;place-items:center;width:29px;height:29px;border:1px solid var(--border);border-radius:8px;flex:none;color:var(--accent)}
.explainer p{font-size:11px;line-height:1.9;color:var(--muted);margin:0;max-width:710px}
.explainer strong{color:var(--text);font-weight:600}
.formula{margin-left:auto;white-space:nowrap;font-family:Georgia,serif;font-size:15px;color:var(--accent)}
@media(min-width:761px){.canvas-wrap{height:auto}}
@media(max-width:760px){.app{padding:20px 14px}.hero{margin-bottom:20px}.hero-note{display:none}.workspace{grid-template-columns:1fr;gap:14px}.canvas-wrap{height:320px;flex:none;min-height:0}.stage-heading{padding:18px 18px 0}.stage-bottom{padding:0 18px 15px}.controls{padding:20px}.controls-title{margin-bottom:18px}.metrics{grid-template-columns:1fr 1fr 1.2fr;gap:8px}.metrics>div:last-child{grid-column:auto;display:block}.metrics>div:last-child strong{font-size:22px;margin-top:5px}.formula{display:none}.explainer{align-items:flex-start}.intro{font-size:12px}}
@media(max-width:360px){.canvas-wrap{height:270px}.range-caption{font-size:8px}}
html[data-embedded="true"] body{background:transparent}
html[data-embedded="true"] .app{padding:0}
html[data-embedded="true"] .hero,html[data-embedded="true"] .explainer{display:none}