:root{--space-1: 4px;--space-2: 8px;--space-3: 12px;--space-4: 16px;--space-5: 24px;--space-6: 32px;--radius-s: 6px;--radius-m: 10px;--radius-l: 16px;--radius-xl: 24px;--font-ui: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--font-mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;--text-xs: 11px;--text-sm: 13px;--text-md: 15px;--text-lg: 18px;--text-xl: 22px;--text-2xl: 28px;--text-3xl: 36px;--topbar-h: 52px;--toolbar-w: 64px;--panel-w: 320px;--touch-min: 44px;--color-bg: #f3f4f8;--color-surface: #ffffff;--color-surface-2: #eceef2;--color-surface-3: #e2e5eb;--color-border: #d9dce3;--color-text: #1c1e21;--color-text-muted: #6b7280;--color-accent: #4f46e5;--color-accent-2: #7c3aed;--color-accent-contrast: #ffffff;--color-danger: #dc2626;--color-success: #16a34a;--color-warn: #d97706;--color-mask: rgba(220, 38, 38, .85);--color-brush-ring: rgba(255, 255, 255, .95);--gradient-accent: linear-gradient(135deg, var(--color-accent), var(--color-accent-2));--shadow-1: 0 1px 2px rgba(16, 24, 40, .06);--shadow-2: 0 8px 24px rgba(16, 24, 40, .14);--shadow-3: 0 16px 48px rgba(16, 24, 40, .18)}:root[data-theme=dark]{--color-bg: #0f1115;--color-surface: #171a21;--color-surface-2: #1f242e;--color-surface-3: #272e3a;--color-border: #2b313c;--color-text: #e7eaf0;--color-text-muted: #98a1b0;--color-accent: #818cf8;--color-accent-2: #a78bfa;--color-accent-contrast: #10131a;--color-danger: #f87171;--color-success: #4ade80;--color-warn: #fbbf24;--color-mask: rgba(248, 113, 113, .85);--color-brush-ring: rgba(0, 0, 0, .85);--shadow-1: 0 1px 2px rgba(0, 0, 0, .4);--shadow-2: 0 8px 24px rgba(0, 0, 0, .55);--shadow-3: 0 16px 48px rgba(0, 0, 0, .6)}*,*:before,*:after{box-sizing:border-box}html,body{height:100%;margin:0;padding:0}body{font-family:var(--font-ui);font-size:var(--text-md);line-height:1.5;color:var(--color-text);background:var(--color-bg);-webkit-font-smoothing:antialiased;overscroll-behavior:none}button{font:inherit;color:inherit;background:none;border:none;cursor:pointer;touch-action:manipulation}button:disabled{cursor:not-allowed;opacity:.45}input,select{font:inherit;color:inherit}h1,h2,h3,p{margin:0}h2,h3{font-size:var(--text-md);font-weight:600}.muted{color:var(--color-text-muted);font-size:var(--text-xs)}[hidden]{display:none!important}:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-thumb{background:var(--color-surface-3);border-radius:999px;border:2px solid transparent;background-clip:content-box}::-webkit-scrollbar-thumb:hover{background:var(--color-text-muted);background-clip:content-box}::-webkit-scrollbar-track{background:transparent}#app{display:grid;grid-template-rows:var(--topbar-h) 1fr;height:100dvh;overflow:hidden}#topbar{display:flex;align-items:center;justify-content:space-between;gap:var(--space-3);padding:0 var(--space-4);background:color-mix(in srgb,var(--color-surface) 88%,transparent);backdrop-filter:blur(14px) saturate(1.4);-webkit-backdrop-filter:blur(14px) saturate(1.4);border-bottom:1px solid var(--color-border);z-index:30}.brand{display:flex;align-items:center;gap:var(--space-2)}.brand-logo{display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:8px;background:var(--gradient-accent);color:var(--color-accent-contrast);font-size:var(--text-md);box-shadow:0 2px 8px color-mix(in srgb,var(--color-accent) 45%,transparent)}.brand-name{font-size:var(--text-lg);font-weight:700;letter-spacing:-.02em}.topbar-actions{display:flex;gap:var(--space-2)}#workspace{position:relative;min-height:0;overflow-y:auto;overscroll-behavior:contain;scroll-behavior:smooth;scroll-snap-type:y proximity}@keyframes pop-in{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.floating,#paint-bar,#result-actions{animation:pop-in .18s ease}#import-hero{min-height:calc(100dvh - var(--topbar-h));width:100%;display:flex;align-items:center;justify-content:center;color:var(--color-text-muted);padding:var(--space-6) var(--space-4);scroll-snap-align:start}#editor{width:100%;max-width:900px;margin:0 auto;padding:var(--space-5) var(--space-4) var(--space-6);display:flex;flex-direction:column;gap:var(--space-4);align-items:center;scroll-snap-align:start;min-height:calc(100dvh - var(--topbar-h));justify-content:center}#faq-page{min-height:calc(100dvh - var(--topbar-h));width:100%;display:flex;align-items:center;justify-content:center;padding:var(--space-6) var(--space-4);scroll-snap-align:start}.faq{width:100%;max-width:720px;display:flex;flex-direction:column;gap:var(--space-3)}.faq-title{font-size:var(--text-2xl);font-weight:800;letter-spacing:-.02em;text-align:center;margin-bottom:var(--space-2)}.faq-item{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-m);box-shadow:var(--shadow-1);overflow:hidden;transition:border-color .15s ease,box-shadow .15s ease}.faq-item:hover{border-color:color-mix(in srgb,var(--color-accent) 35%,var(--color-border))}.faq-item[open]{border-color:color-mix(in srgb,var(--color-accent) 30%,var(--color-border));box-shadow:var(--shadow-2)}.faq-item summary{list-style:none;cursor:pointer;padding:var(--space-3) var(--space-4);font-size:var(--text-sm);font-weight:700;color:var(--color-text);display:flex;align-items:center;justify-content:space-between;gap:var(--space-3);user-select:none}.faq-item summary::-webkit-details-marker{display:none}.faq-item summary:after{content:"+";flex:0 0 auto;font-size:var(--text-lg);line-height:1;font-weight:600;color:var(--color-accent);transition:transform .18s ease}.faq-item[open] summary:after{content:"−"}.faq-item p{padding:0 var(--space-4) var(--space-3);font-size:var(--text-sm);line-height:1.6;color:var(--color-text-muted)}#site-footer{width:100%;display:flex;align-items:center;justify-content:center;gap:var(--space-2);padding:var(--space-4) var(--space-4) var(--space-5);font-size:var(--text-xs);color:var(--color-text-muted);scroll-snap-align:end}#site-footer a{color:var(--color-text-muted);text-decoration:none;border-bottom:1px solid transparent;transition:color .12s ease,border-color .12s ease}#site-footer a:hover{color:var(--color-accent);border-color:color-mix(in srgb,var(--color-accent) 40%,transparent)}#preview{position:relative;width:100%;height:min(56vh,520px);min-height:260px;overflow:hidden;background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-l);box-shadow:inset 0 1px color-mix(in srgb,var(--color-surface) 60%,transparent),var(--shadow-2);display:flex;align-items:center;justify-content:center;touch-action:none}#edit-panel{width:100%;display:flex;flex-direction:column;align-items:stretch;gap:var(--space-3)}#canvas{max-width:100%;max-height:100%;box-shadow:var(--shadow-2);border-radius:4px;background:var(--color-bg);touch-action:none}#brush-cursor{position:absolute;border:1.5px solid var(--color-brush-ring);border-radius:50%;box-shadow:0 0 0 1px #00000059;pointer-events:none;z-index:5}.floating{background:color-mix(in srgb,var(--color-surface) 90%,transparent);backdrop-filter:blur(10px);border:1px solid var(--color-border);border-radius:var(--radius-l);box-shadow:var(--shadow-2);z-index:11}#step-bar{display:flex;align-items:center;justify-content:center;gap:var(--space-3);padding:var(--space-2) var(--space-4);border-radius:999px;white-space:nowrap;width:fit-content;margin:0 auto}#step-bar .step{display:flex;align-items:center;gap:var(--space-2);font-size:var(--text-sm);font-weight:600;color:var(--color-text-muted);transition:color .15s}#step-bar .step-num{display:inline-flex;align-items:center;justify-content:center;width:22px;height:22px;border-radius:50%;background:var(--color-surface-3);color:var(--color-text-muted);font-size:var(--text-xs);font-weight:700;transition:background .15s,color .15s,box-shadow .15s}#step-bar .step[data-state=done]{color:var(--color-text)}#step-bar .step[data-state=done] .step-num{background:var(--color-success);color:#fff}#step-bar .step[data-state=active]{color:var(--color-text)}#step-bar .step[data-state=active] .step-num{background:var(--gradient-accent);color:var(--color-accent-contrast);box-shadow:0 0 0 3px color-mix(in srgb,var(--color-accent) 25%,transparent);transform:scale(1.1)}#step-bar .step-arrow{color:var(--color-text-muted);font-size:var(--text-sm)}#batch-bar{display:flex;align-items:center;gap:var(--space-3);padding:var(--space-2) var(--space-3);width:100%}#batch-thumbs{display:flex;gap:var(--space-2);overflow-x:auto;flex:1;min-width:0;padding:2px}.batch-thumb{position:relative;flex:0 0 auto;width:52px;height:52px;border-radius:var(--radius-m);border:2px solid transparent;overflow:hidden;padding:0;background:var(--color-surface-2);transition:border-color .12s,transform 80ms}.batch-thumb canvas{width:100%;height:100%;display:block}.batch-thumb:hover{transform:translateY(-2px);border-color:color-mix(in srgb,var(--color-accent) 45%,var(--color-border));box-shadow:var(--shadow-1)}.batch-thumb.active{border-color:var(--color-accent);box-shadow:var(--shadow-1)}.batch-thumb .thumb-check{position:absolute;top:3px;right:3px;width:16px;height:16px;border-radius:50%;background:var(--color-success);color:#fff;font-size:10px;line-height:16px;text-align:center;display:none}.batch-thumb.done .thumb-check{display:block}.batch-actions{display:flex;gap:var(--space-2);flex:0 0 auto}#paint-bar{display:flex;align-items:center;justify-content:space-between;gap:var(--space-3);padding:var(--space-3) var(--space-4);width:100%;flex-wrap:wrap;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-l)}.brush-controls{display:flex;align-items:center;gap:var(--space-3);flex-wrap:wrap;min-width:0}.range-control{display:flex;align-items:center;gap:var(--space-2);font-size:var(--text-xs);color:var(--color-text-muted);white-space:nowrap}.range-control output{min-width:40px;text-align:right;font-variant-numeric:tabular-nums;font-weight:700;font-size:var(--text-xs);color:var(--color-text);background:var(--color-surface-2);border:1px solid var(--color-border);border-radius:var(--radius-s);padding:2px 6px}.range-control input[type=range]{width:110px;height:20px;appearance:none;-webkit-appearance:none;background:transparent;cursor:pointer}.range-control input[type=range]::-webkit-slider-runnable-track{height:4px;border-radius:999px;background:linear-gradient(to right,var(--color-accent) var(--range-pct, 50%),var(--color-surface-3) var(--range-pct, 50%))}.range-control input[type=range]::-moz-range-track{height:4px;border-radius:999px;background:var(--color-surface-3)}.range-control input[type=range]::-moz-range-progress{height:4px;border-radius:999px;background:var(--color-accent)}.range-control input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:16px;height:16px;margin-top:-6px;border-radius:50%;background:var(--color-surface);border:2px solid var(--color-accent);box-shadow:0 1px 4px #00000040;transition:transform .12s ease}.range-control input[type=range]::-moz-range-thumb{width:14px;height:14px;border-radius:50%;background:var(--color-surface);border:2px solid var(--color-accent);box-shadow:0 1px 4px #00000040}.range-control input[type=range]:active::-webkit-slider-thumb{transform:scale(1.2)}.range-control input[type=range]:active::-moz-range-thumb{transform:scale(1.2)}.paint-actions{display:flex;align-items:center;gap:var(--space-2);flex:0 0 auto}#tool-erase{min-width:160px}#result-actions{display:flex;flex-direction:row;flex-wrap:wrap;align-items:center;justify-content:center;gap:var(--space-2);width:100%}.result-btn{min-height:var(--touch-min);padding:var(--space-2) var(--space-4);border-radius:999px;background:var(--color-surface);border:1px solid var(--color-border);box-shadow:var(--shadow-1);font-size:var(--text-sm);font-weight:600;color:var(--color-text);display:inline-flex;align-items:center;justify-content:center;gap:var(--space-2);transition:transform .12s ease,filter .12s ease,box-shadow .12s ease}.result-btn:hover{filter:brightness(1.05);transform:translateY(-1px);box-shadow:var(--shadow-2)}.result-btn:active{transform:scale(.96)}.result-btn.primary{background:var(--gradient-accent);color:var(--color-accent-contrast);border-color:transparent}#progress{width:100%;max-width:420px;margin:0 auto;padding:var(--space-3)}.progress-label{font-size:var(--text-sm);margin-bottom:var(--space-2);display:flex;justify-content:space-between;gap:var(--space-2)}.progress-track{height:8px;border-radius:4px;background:var(--color-surface-2);overflow:hidden}.progress-track .progress-bar{background:var(--gradient-accent)}.progress-actions{display:flex;justify-content:flex-end;margin-top:var(--space-2)}.progress-actions .small-btn{min-height:28px;font-size:var(--text-xs)}.progress-bar{height:100%;width:0%;background:var(--color-accent);transition:width .12s linear}.hero{max-width:860px;width:100%;text-align:center;display:flex;flex-direction:column;align-items:center;gap:var(--space-5);padding:var(--space-5) 0}#zoom-hud{position:absolute;top:var(--space-3);right:var(--space-3);display:flex;align-items:center;gap:var(--space-2);padding:3px 4px 3px var(--space-3);border-radius:999px;font-size:var(--text-xs);font-weight:600;color:var(--color-text-muted);z-index:12}#zoom-label{min-width:36px;text-align:center}.zoom-fit-btn{min-width:28px;min-height:28px;border-radius:999px;background:var(--color-surface-2);border:1px solid var(--color-border);color:var(--color-text);font-size:var(--text-sm);line-height:1;display:inline-flex;align-items:center;justify-content:center;transition:background .12s}.zoom-fit-btn:hover{background:var(--color-surface-3)}.zoom-fit-btn.active{background:var(--color-accent);color:var(--color-accent-contrast);border-color:transparent}.hero-badge{display:inline-flex;align-items:center;gap:var(--space-2);padding:var(--space-2) var(--space-4);border-radius:999px;font-size:var(--text-sm);font-weight:600;color:var(--color-accent);background:color-mix(in srgb,var(--color-accent) 10%,transparent);border:1px solid color-mix(in srgb,var(--color-accent) 26%,transparent)}.hero-badge:before{content:"";width:8px;height:8px;border-radius:50%;background:var(--color-success);box-shadow:0 0 0 3px color-mix(in srgb,var(--color-success) 22%,transparent)}.hero-title{font-size:var(--text-3xl);line-height:1.15;letter-spacing:-.03em;font-weight:800;color:var(--color-text);max-width:640px;background:var(--gradient-accent);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent;text-wrap:balance}.hero-sub{font-size:var(--text-lg);line-height:1.55;max-width:560px;color:var(--color-text-muted)}.hero-cta{display:flex;flex-direction:column;align-items:center;gap:var(--space-2);margin-top:var(--space-2)}.hero-cta .btn-lg{transition:transform .14s ease,box-shadow .14s ease,filter .14s ease}.hero-cta .btn-lg:hover{transform:translateY(-1px);box-shadow:0 12px 28px color-mix(in srgb,var(--color-accent) 38%,transparent);filter:brightness(1.06)}.hero-cta .btn-lg:active{transform:translateY(0) scale(.98)}.hero-hint{font-size:var(--text-sm);color:var(--color-text-muted)}.btn-lg{min-height:52px;padding:var(--space-3) var(--space-6);font-size:var(--text-md);border-radius:var(--radius-l);box-shadow:var(--shadow-2)}.hero-steps{display:flex;align-items:center;gap:var(--space-3);flex-wrap:wrap;justify-content:center;padding:var(--space-4);border-radius:var(--radius-l);width:100%}.hero-steps .step{display:flex;align-items:center;gap:var(--space-2);font-size:var(--text-sm);font-weight:600;color:var(--color-text)}.step-num{display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;border-radius:50%;background:var(--gradient-accent);color:var(--color-accent-contrast);font-size:var(--text-xs);font-weight:700}.step-arrow{color:var(--color-text-muted)}.feature-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--space-3);width:100%;max-width:720px}.feature-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-m);box-shadow:var(--shadow-1);padding:var(--space-3) var(--space-4);text-align:left;display:flex;flex-direction:column;gap:var(--space-1);transition:transform .15s ease,box-shadow .15s ease,border-color .15s ease}.feature-card:hover{transform:translateY(-2px);border-color:color-mix(in srgb,var(--color-accent) 40%,var(--color-border));box-shadow:var(--shadow-2)}.feature-icon{font-size:var(--text-xl);line-height:1}.feature-card h3{font-size:var(--text-sm);font-weight:700;color:var(--color-text)}.feature-card p{font-size:var(--text-xs);color:var(--color-text-muted);line-height:1.5}.icon-btn{min-width:var(--touch-min);min-height:var(--touch-min);border-radius:var(--radius-m);font-size:var(--text-md);color:var(--color-text);background:var(--color-surface-2);border:1px solid transparent;padding:0 var(--space-3);transition:background .12s ease,border-color .12s ease,transform .12s ease}.icon-btn:hover{background:var(--color-surface-3);border-color:var(--color-border)}.icon-btn:active{transform:scale(.95)}a.icon-btn.github-link{display:inline-flex;align-items:center;justify-content:center;text-decoration:none;padding:0 var(--space-2)}.github-link svg{display:block}.primary-btn,.small-btn{min-height:36px;border-radius:var(--radius-s);padding:var(--space-2) var(--space-3);font-size:var(--text-sm);font-weight:600;transition:transform .12s ease,filter .12s ease,box-shadow .12s ease,background .12s ease}.primary-btn:active,.small-btn:active{transform:scale(.97)}.primary-btn{background:var(--gradient-accent);color:var(--color-accent-contrast);box-shadow:0 2px 8px color-mix(in srgb,var(--color-accent) 35%,transparent)}.primary-btn:hover{filter:brightness(1.07);transform:translateY(-1px);box-shadow:0 6px 16px color-mix(in srgb,var(--color-accent) 45%,transparent)}.primary-btn:disabled{box-shadow:none}.small-btn{background:var(--color-surface-2);color:var(--color-text);border:1px solid var(--color-border)}.small-btn:hover{filter:brightness(1.04)}#drop-overlay{position:fixed;inset:0;z-index:100;display:flex;align-items:center;justify-content:center;background:color-mix(in srgb,var(--color-accent) 12%,transparent);backdrop-filter:blur(2px);font-size:var(--text-lg);font-weight:700;color:var(--color-accent);border:3px dashed var(--color-accent);margin:var(--space-4);border-radius:var(--radius-l);pointer-events:none}dialog{border:1px solid var(--color-border);border-radius:var(--radius-l);background:var(--color-surface);color:var(--color-text);box-shadow:var(--shadow-3);padding:0;max-width:min(440px,calc(100vw - 32px));max-height:min(80vh,640px)}dialog::backdrop{background:#00000073;backdrop-filter:blur(2px)}.dlg{display:flex;flex-direction:column;gap:var(--space-3);padding:var(--space-5);overflow-y:auto;max-height:inherit}.dlg h2{margin:0}.dlg-note{font-size:var(--text-sm);color:var(--color-text-muted)}.req-list{margin:0;padding-left:var(--space-4);font-size:var(--text-xs);color:var(--color-text-muted);display:flex;flex-direction:column;gap:4px}.dlg input[type=text],.dlg input[type=url],.dlg select{width:100%;min-height:40px;border:1px solid var(--color-border);border-radius:var(--radius-s);background:var(--color-surface-2);color:var(--color-text);padding:var(--space-2) var(--space-3)}.dlg input:focus-visible{outline:2px solid var(--color-accent);outline-offset:1px}.dlg-actions{display:flex;justify-content:flex-end;gap:var(--space-2);margin-top:var(--space-2)}.dlg .row{display:flex;align-items:center;gap:var(--space-2);min-height:var(--touch-min)}.dlg .row>label{flex:0 0 auto;font-size:var(--text-sm);color:var(--color-text-muted)}.dlg .row select{flex:1;width:auto}.dlg .row input[type=range]{flex:1;min-width:0;accent-color:var(--color-accent)}.current-model{font-size:var(--text-sm);border:1px solid var(--color-accent);border-radius:var(--radius-m);padding:var(--space-2) var(--space-3);background:color-mix(in srgb,var(--color-accent) 10%,transparent);display:flex;flex-direction:column;gap:2px}.current-model .cm-name{font-weight:600}.model-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:var(--space-2)}.model-item{border:1px solid var(--color-border);border-radius:var(--radius-m);padding:var(--space-3);display:flex;flex-direction:column;gap:var(--space-2);transition:border-color .12s,box-shadow .12s}.model-item.selected{border-color:var(--color-accent);box-shadow:var(--shadow-1)}.model-item .mi-head{display:flex;align-items:center;justify-content:space-between;gap:var(--space-2)}.model-item .mi-name{font-weight:600;font-size:var(--text-sm)}.model-item .mi-meta{font-size:var(--text-xs);color:var(--color-text-muted)}.model-item .mi-actions{display:flex;gap:var(--space-2);flex-wrap:wrap}.badge{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.04em;border-radius:999px;padding:2px 8px;background:var(--gradient-accent);color:var(--color-accent-contrast)}.badge.muted-badge{background:var(--color-surface-2);color:var(--color-text-muted)}.badge.reason{background:var(--color-danger);color:#fff}@media(max-width:767px){.hero-title{font-size:var(--text-2xl)}.hero-sub{font-size:var(--text-md)}#import-hero{padding:var(--space-5) var(--space-3)}#editor{padding:var(--space-4) var(--space-3) var(--space-5)}#preview{height:min(48vh,400px);min-height:220px}.hero-steps{flex-direction:column;align-items:stretch;gap:var(--space-2)}.hero-steps .step-arrow{transform:rotate(90deg);text-align:center}.feature-grid{grid-template-columns:1fr}#step-bar{gap:var(--space-2);padding:var(--space-1) var(--space-3)}#step-bar .step span:not(.step-num){display:none}#step-bar .step-arrow{font-size:var(--text-xs)}#batch-bar{width:100%;flex-direction:column;align-items:stretch;gap:var(--space-2)}.batch-actions .small-btn{flex:1}#paint-bar{gap:var(--space-2);padding:var(--space-3)}.brush-controls{justify-content:center;gap:var(--space-2)}.range-control{flex:1 1 100%;justify-content:space-between}.range-control input[type=range]{flex:1;width:auto}.paint-actions{width:100%;justify-content:center}#tool-erase{flex:1;min-width:0}#result-actions{flex-direction:row;flex-wrap:wrap;justify-content:center}.result-btn{flex:1 1 auto;min-height:var(--touch-min);padding:var(--space-2) var(--space-3)}#progress{width:100%}}