:root{--bg: #0c0e12;--panel: #12151b;--panel-2: #181c24;--well: #0f1218;--line: #232834;--line-strong: #303748;--text: #e9ecf2;--text-dim: #98a0b3;--accent: #c9f73a;--accent-hover: #d6ff55;--accent-soft: rgba(201, 247, 58, .14);--accent-ink: #131804;--danger: #ff5d73;--danger-ink: #ffffff;--checker-a: #171a21;--checker-b: #1f242e;--shadow-canvas: 0 20px 50px rgba(0, 0, 0, .45);--shadow-sheet: 0 -16px 40px rgba(0, 0, 0, .5);--font-ui: "Avenir Next", Avenir, "Helvetica Neue", system-ui, sans-serif;--font-mono: ui-monospace, "SF Mono", Menlo, monospace;--radius: 0;--radius-s: 0;--control-h: 34px;--space-1: 4px;--space-2: 8px;--space-3: 12px;--space-4: 16px;--space-5: 24px}:root[data-theme=light]{--bg: #eef0f4;--panel: #ffffff;--panel-2: #f1f3f7;--well: #f7f8fa;--line: #e0e4ea;--line-strong: #c2c8d4;--text: #171a20;--text-dim: #5d6675;--accent-soft: rgba(201, 247, 58, .3);--danger: #e5384f;--checker-a: #ffffff;--checker-b: #e6e9ee;--shadow-canvas: 0 16px 40px rgba(23, 26, 32, .14);--shadow-sheet: 0 -16px 40px rgba(23, 26, 32, .18)}*{box-sizing:border-box}html,body{margin:0;height:100%}body{background:var(--bg);color:var(--text);font-family:var(--font-ui);font-size:16px;line-height:1.45;-webkit-font-smoothing:antialiased}#app{display:flex;flex-direction:column;height:100dvh}button{font:inherit;color:inherit;cursor:pointer;border:none;background:none;padding:0}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}.topbar{display:flex;align-items:center;gap:var(--space-4);padding:0 var(--space-4);min-height:56px;border-bottom:1px solid var(--line);background:var(--panel);flex-wrap:wrap}.wordmark{display:flex;align-items:center;gap:2px;font-size:21px;font-weight:700;letter-spacing:-.02em;padding-block:var(--space-2)}.wordmark-mark{width:22px;height:22px;flex-shrink:0}.seed-group{display:flex;align-items:center;gap:var(--space-2);margin-left:auto}.seed-label{font-size:13px;color:var(--text-dim)}.seed-input{width:118px;height:var(--control-h);border:1px solid var(--line);background:var(--well);color:var(--text);font-family:var(--font-mono);font-size:13px;padding:0 var(--space-2)}.seed-input:focus{border-color:var(--line-strong);outline:2px solid var(--accent);outline-offset:0}.export-group{display:flex;gap:var(--space-2)}.btn{height:var(--control-h);padding:0 var(--space-3);border:1px solid var(--line);background:var(--panel-2);font-size:14px;font-weight:500;transition:border-color .12s ease,background .12s ease,transform 80ms ease}.btn:hover{border-color:var(--line-strong);background:var(--bg)}.btn:active{transform:translateY(1px)}.btn-primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink);font-weight:600}.btn-primary:hover{background:var(--accent-hover);border-color:var(--accent-hover)}.btn-block{width:100%}.btn-icon{width:var(--control-h);padding:0;display:grid;place-items:center;color:var(--text-dim)}.btn-icon:hover{color:var(--text)}.btn-icon svg{width:17px;height:17px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}.icon-moon{display:none}:root[data-theme=light] .icon-moon{display:block}:root[data-theme=light] .icon-sun{display:none}.btn.is-confirming{border-color:var(--accent);color:var(--accent)}.layout{display:flex;flex:1;min-height:0}.panel{width:300px;flex-shrink:0;border-right:1px solid var(--line);background:var(--panel);display:flex;flex-direction:column;min-height:0}.panel-scroll{overflow-y:auto;padding:var(--space-4);display:flex;flex-direction:column;gap:var(--space-4)}.sheet-handle{display:none}.stage{flex:1;min-width:0;display:grid;place-items:center;padding:var(--space-5);background-image:radial-gradient(var(--line) 1px,transparent 1px);background-size:26px 26px}.canvas-frame{width:min(100%,82vh,720px);aspect-ratio:1;border:1px solid var(--line);overflow:hidden;box-shadow:var(--shadow-canvas)}.checker{width:100%;height:100%;background:conic-gradient(var(--checker-b) 90deg,var(--checker-a) 90deg 180deg,var(--checker-b) 180deg 270deg,var(--checker-a) 270deg) 0 0 / 18px 18px}#preview svg{display:block;width:100%;height:100%}.control-section{display:flex;flex-direction:column;gap:var(--space-3)}.control-section+.control-section{border-top:1px solid var(--line);padding-top:var(--space-4)}.section-title{margin:0;font-size:16px;font-weight:600;color:var(--text)}.section-hint{margin:-8px 0 0;font-size:13px;color:var(--text-dim)}.sub-title{margin:0 0 var(--space-2);font-size:12px;font-weight:600;letter-spacing:.03em;color:var(--text-dim)}.slider-row{display:grid;grid-template-columns:1fr auto;gap:var(--space-1) var(--space-2);align-items:center}.slider-row label{font-size:14px}.slider-row output{font-family:var(--font-mono);font-size:12px;color:var(--text-dim);background:var(--well);border:1px solid var(--line);padding:1px 6px;min-width:42px;text-align:right}.slider-row input[type=range]{grid-column:1 / -1}.slider-row.is-disabled label,.slider-row.is-disabled output{opacity:.45}input[type=range]{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:100%;height:22px;background:transparent;margin:0}input[type=range]::-webkit-slider-runnable-track{height:5px;background:var(--line-strong)}input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:18px;height:18px;background:var(--accent);border:3px solid var(--panel);box-shadow:0 0 0 1px var(--line-strong);margin-top:-6.5px}input[type=range]:disabled::-webkit-slider-thumb{background:var(--text-dim)}input[type=range]::-moz-range-track{height:5px;background:var(--line-strong)}input[type=range]::-moz-range-thumb{width:12px;height:12px;border-radius:0;background:var(--accent);border:3px solid var(--panel);box-shadow:0 0 0 1px var(--line-strong)}input[type=range]:disabled::-moz-range-thumb{background:var(--text-dim)}.switch-row{display:flex;align-items:center;justify-content:space-between;gap:var(--space-3);font-size:14px;cursor:pointer}.switch{position:relative;flex-shrink:0}.switch input{position:absolute;opacity:0;top:0;right:0;bottom:0;left:0;margin:0;cursor:pointer}.switch-track{display:block;width:36px;height:20px;background:var(--line-strong);transition:background .14s ease}.switch-track:after{content:"";position:absolute;top:3px;left:3px;width:14px;height:14px;background:var(--text);transition:transform .14s ease,background .14s ease}.switch input:checked+.switch-track{background:var(--accent)}.switch input:checked+.switch-track:after{transform:translate(16px);background:var(--accent-ink)}.switch input:focus-visible+.switch-track{outline:2px solid var(--accent);outline-offset:2px}.shape-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(44px,1fr));gap:var(--space-2)}.shape-cell{position:relative}.shape-toggle{width:100%;aspect-ratio:1;border:1px solid var(--line);background:var(--panel-2);display:grid;place-items:center;color:var(--text-dim);transition:border-color .12s ease,color .12s ease,background .12s ease}.shape-toggle svg{width:24px;height:24px;fill:currentColor;stroke:currentColor;pointer-events:none}.shape-toggle:hover{border-color:var(--line-strong)}.shape-toggle[aria-pressed=true]{border-color:var(--accent);background:var(--accent-soft);color:var(--text)}.shape-remove{position:absolute;top:-5px;right:-5px;width:16px;height:16px;background:var(--danger);color:var(--danger-ink);font-size:11px;line-height:1;display:grid;place-items:center}.custom-add{display:flex;flex-direction:column;gap:var(--space-2)}.custom-add textarea{width:100%;background:var(--well);border:1px solid var(--line);color:var(--text);font-family:var(--font-mono);font-size:12px;padding:var(--space-2);resize:vertical}.status-line{margin:0;font-size:13px;color:var(--text-dim);min-height:1.2em}.status-line.is-error{color:var(--danger)}.blur-controls{display:flex;flex-direction:column;gap:var(--space-3)}.blur-controls.is-disabled label,.blur-controls.is-disabled output,.blur-controls.is-disabled .mode-chip{opacity:.45}.mode-row{display:grid;grid-template-columns:repeat(3,1fr);align-items:stretch;gap:2px;padding:3px;border:1px solid var(--line);background:var(--well)}.mode-chip{min-height:30px;padding:5px 4px;font-size:12px;line-height:1.2;color:var(--text-dim);transition:background .12s ease,color .12s ease}.mode-chip:hover{color:var(--text)}.mode-chip[aria-pressed=true]{background:var(--accent);color:var(--accent-ink);font-weight:600}.origin-row{display:flex;align-items:center;justify-content:space-between}.origin-label{font-size:14px}.origin-grid{display:grid;grid-template-areas:"tl . tr" ". c ." "bl . br";gap:6px;padding:8px;border:1px solid var(--line);background:var(--well)}.origin-dot{width:18px;height:18px;display:grid;place-items:center}.origin-dot:after{content:"";width:8px;height:8px;background:var(--line-strong);transition:background .12s ease,box-shadow .12s ease}.origin-dot:hover:after{background:var(--text-dim)}.origin-dot[aria-pressed=true]:after{background:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}.origin-dot[data-origin=top-left]{grid-area:tl}.origin-dot[data-origin=top-right]{grid-area:tr}.origin-dot[data-origin=centre]{grid-area:c}.origin-dot[data-origin=bottom-left]{grid-area:bl}.origin-dot[data-origin=bottom-right]{grid-area:br}.colour-group>.switch-row{margin-bottom:var(--space-2)}.preset-row{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-2)}.preset-chip{width:100%;height:30px;border:1px solid var(--line);transition:border-color .12s ease,transform 80ms ease}.preset-chip:hover{border-color:var(--line-strong);transform:translateY(-1px)}.palette-editor{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-2)}.swatch{position:relative;width:100%;height:44px;border:1px solid var(--line);cursor:pointer}.swatch input[type=color]{position:absolute;top:0;right:0;bottom:0;left:0;opacity:0;cursor:pointer;width:100%;height:100%}.swatch-remove{position:absolute;top:-5px;right:-5px;width:18px;height:18px;background:var(--danger);color:var(--danger-ink);font-size:12px;line-height:1;display:grid;place-items:center}.swatch-add{width:100%;height:44px;border:1px dashed var(--line-strong);color:var(--text-dim);font-size:18px;display:grid;place-items:center}.swatch-add:hover{color:var(--text);border-color:var(--text-dim)}.bg-swatch{display:block;width:calc((100% - var(--space-2) * 2) / 3)}.bg-swatch.is-transparent{background:conic-gradient(var(--checker-b) 90deg,var(--checker-a) 90deg 180deg,var(--checker-b) 180deg 270deg,var(--checker-a) 270deg) 0 0 / 14px 14px}.bg-swatch.is-transparent input[type=color]{cursor:default}@media(prefers-reduced-motion:no-preference){.control-section,.canvas-frame{animation:rise .36s ease both}.control-section:nth-child(2){animation-delay:40ms}.control-section:nth-child(3){animation-delay:80ms}.control-section:nth-child(4){animation-delay:.12s}.canvas-frame{animation-delay:60ms}@keyframes rise{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}}@media(max-width:767px){.topbar{gap:var(--space-2);padding:var(--space-2) var(--space-3)}.wordmark{order:1}#theme-toggle{order:2;margin-left:auto}.seed-group{order:3;width:100%;margin-left:0}.seed-input{flex:1;width:auto}.export-group{order:4;width:100%;flex-wrap:wrap}.export-group .btn{flex:1 1 calc(50% - var(--space-2))}.layout{flex-direction:column}.stage{padding:var(--space-3);padding-bottom:52vh}.panel{position:fixed;left:0;right:0;bottom:0;width:auto;max-height:48vh;border-right:none;border-top:1px solid var(--line-strong);box-shadow:var(--shadow-sheet);z-index:10;transition:transform .22s ease}.sheet-handle{display:flex;flex-direction:column;align-items:center;gap:2px;padding:var(--space-2) 0 var(--space-1);width:100%;font-size:13px;color:var(--text-dim)}.sheet-pill{width:40px;height:4px;background:var(--line-strong)}.panel.is-collapsed{transform:translateY(calc(100% - 46px))}.panel.is-collapsed .panel-scroll{overflow:hidden}#bmc-wbtn{width:52px!important;height:52px!important;right:12px!important;bottom:62px!important}}