:root{--bg:#f8f9fb;--surface:#fff;--surface-warm:var(--surface);--fg:#1a1a1a;--fg-2:var(--fg);--muted:#71717a;--meta:var(--muted);--border:#e9eaee;--border-soft:var(--border);--accent:#3d6b62;--accent-on:#fff;--accent-hover:color-mix(in oklab, var(--accent), black 8%);--accent-active:color-mix(in oklab, var(--accent), black 14%);--success:#17a34a;--warn:#eab308;--danger:#dc2626;--font-display:"Inter", -apple-system, system-ui, sans-serif;--font-body:"Inter", -apple-system, system-ui, sans-serif;--font-mono:ui-monospace, "JetBrains Mono", monospace;--text-xs:13px;--text-sm:14px;--text-base:16px;--text-lg:20px;--text-xl:24px;--text-2xl:32px;--text-3xl:48px;--text-4xl:64px;--leading-body:1.6;--leading-tight:1.2;--tracking-display:-.01em;--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:20px;--space-6:24px;--space-8:32px;--space-12:48px;--space-20:80px;--section-y-desktop:80px;--section-y-tablet:48px;--section-y-phone:32px;--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--radius-pill:9999px;--elev-flat:none;--elev-ring:0 0 0 1px var(--border);--elev-raised:0 2px 8px color-mix(in oklab, var(--fg), transparent 92%);--focus-ring:0 0 0 3px color-mix(in oklab, var(--accent), transparent 70%);--motion-fast:.2s;--motion-base:.2s;--ease-standard:cubic-bezier(.2, 0, 0, 1);--shadow-sm:0 1px 2px #0000000a;--shadow-md:0 4px 16px #0000000f, 0 1px 4px #0000000a;--shadow-lg:0 8px 32px #00000014, 0 2px 8px #0000000a;--container-max:1200px;--container-gutter-desktop:24px;--container-gutter-tablet:16px;--container-gutter-phone:12px;--container-gutter:24px}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{-webkit-text-size-adjust:100%}body{font-family:var(--font-body);font-size:var(--text-base);line-height:var(--leading-body);color:var(--fg);background:var(--bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;min-height:100vh}.container{max-width:var(--container-max);padding:0 var(--container-gutter);margin:0 auto}.header{padding:var(--space-5) 0;border-bottom:1px solid var(--border-soft)}.header-inner{max-width:var(--container-max);padding:0 var(--container-gutter);justify-content:space-between;align-items:center;margin:0 auto;display:flex}.logo{align-items:center;gap:var(--space-2);letter-spacing:var(--tracking-display);color:var(--fg);font-size:22px;font-weight:600;text-decoration:none;display:flex}.logo-mark{background:var(--accent);border-radius:var(--radius-sm);width:32px;height:32px;color:var(--accent-on);font-size:20px;font-weight:700;font-family:var(--font-mono);place-items:center;display:grid}.nav-links{gap:var(--space-1);list-style:none;display:flex;position:relative}.main{padding:var(--space-8) 0 var(--space-12)}.upload-section{margin-bottom:var(--space-8)}.upload-zone{border:2px dashed var(--border);border-radius:var(--radius-md);padding:var(--space-12) var(--space-8);text-align:center;cursor:pointer;transition:border-color var(--motion-base) var(--ease-standard), background var(--motion-base) var(--ease-standard);position:relative}.upload-zone:hover,.upload-zone.drag-over{border-color:var(--accent);background:color-mix(in oklab, var(--surface), var(--accent) 5%)}.upload-zone.drag-over{border-style:solid}.upload-icon{width:48px;height:48px;margin:0 auto var(--space-4);color:var(--muted)}.upload-zone:hover .upload-icon,.upload-zone.drag-over .upload-icon{color:var(--accent)}.upload-title{font-size:var(--text-lg);margin-bottom:var(--space-2);letter-spacing:var(--tracking-display);font-weight:600}.upload-hint{color:var(--muted);font-size:var(--text-sm);letter-spacing:.02em}.upload-hint code{font-family:var(--font-mono);font-size:var(--text-xs);color:var(--accent);background:color-mix(in oklab, var(--surface-warm), var(--accent) 8%);border-radius:3px;padding:1px 6px}.options-bar{align-items:center;gap:var(--space-4);padding:var(--space-4) var(--space-5);background:var(--surface);border:1px solid var(--border-soft);border-radius:var(--radius-md);margin-bottom:var(--space-8);flex-wrap:wrap;display:flex}.options-bar label{font-size:var(--text-sm);color:var(--muted);letter-spacing:.02em;white-space:nowrap}.options-bar select{appearance:none;background:var(--surface-warm);color:var(--fg);border:1px solid var(--border);border-radius:var(--radius-sm);padding:var(--space-2) var(--space-8) var(--space-2) var(--space-3);font-size:var(--text-sm);font-family:var(--font-body);cursor:pointer;transition:border-color var(--motion-fast) var(--ease-standard);background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236b6b6b' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");background-position:right 8px center;background-repeat:no-repeat}.options-bar select:focus{border-color:var(--accent);box-shadow:var(--focus-ring);outline:none}.options-divider{background:var(--border-soft);width:1px;height:20px}.preview-header{margin-bottom:var(--space-4);justify-content:space-between;align-items:center;display:flex}.preview-tabs{gap:var(--space-1);background:var(--surface);border-radius:var(--radius-sm);border:1px solid var(--border-soft);padding:3px;display:flex}.preview-tab{padding:var(--space-2) var(--space-4);color:var(--muted);font-size:var(--text-sm);font-family:var(--font-body);cursor:pointer;letter-spacing:.02em;transition:all var(--motion-fast) var(--ease-standard);background:0 0;border:0;border-radius:6px}.preview-tab.active{background:var(--surface-warm);color:var(--fg)}.preview-tab:hover:not(.active){color:var(--fg-2)}.file-name{font-family:var(--font-mono);font-size:var(--text-xs);color:var(--muted);letter-spacing:.02em}.compare-container{border-radius:var(--radius-md);border:1px solid var(--border);aspect-ratio:16/10;cursor:col-resize;-webkit-user-select:none;user-select:none;background:#000;min-height:400px;position:relative;overflow:hidden}.compare-img{object-fit:contain;width:100%;height:100%;position:absolute;top:0;left:0}.compare-original{height:100%;position:absolute;top:0;left:0;overflow:hidden}.compare-original .compare-img{width:auto;max-width:none;height:100%;position:absolute;top:0;left:0}.compare-slider{background:var(--accent);pointer-events:none;width:2px;position:absolute;top:0;bottom:0;transform:translate(-50%)}.compare-handle{background:var(--accent);width:40px;height:40px;box-shadow:0 0 0 4px color-mix(in oklab, var(--accent), transparent 70%), 0 4px 16px #00000040;pointer-events:none;border-radius:50%;place-items:center;display:grid;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.compare-handle svg{width:18px;height:18px;color:var(--accent-on)}.compare-label{top:var(--space-4);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);color:#fff;padding:var(--space-1) var(--space-3);border-radius:var(--radius-sm);font-size:var(--text-xs);font-family:var(--font-mono);letter-spacing:.06em;text-transform:uppercase;pointer-events:none;background:#000000b8;position:absolute}.compare-label.original{left:var(--space-4)}.compare-label.processed{right:var(--space-4)}.single-view{border-radius:var(--radius-md);border:1px solid var(--border);background:#000;overflow:hidden}.single-view img{object-fit:contain;width:100%;max-height:600px;display:block}.result-actions{gap:var(--space-3);margin-top:var(--space-5);flex-wrap:wrap;display:flex}.btn{align-items:center;gap:var(--space-2);font-family:var(--font-body);font-size:var(--text-sm);letter-spacing:.01em;cursor:pointer;transition:all var(--motion-fast) var(--ease-standard);border:0;border-radius:10px;padding:9px 20px;font-weight:510;text-decoration:none;display:inline-flex}.btn-sm{padding:var(--space-2) var(--space-4);font-size:var(--text-xs);border-radius:8px}.btn-primary{background:var(--accent);color:var(--accent-on)}.btn-primary:hover{background:oklch(from var(--accent) calc(l - .05) c h);box-shadow:0 2px 8px #3d6b6240}.btn-primary:active{transform:scale(.97)}.btn-secondary{background:var(--surface);color:var(--fg);border:1px solid var(--border)}.btn-secondary:hover{background:#f9f9fb;border-color:#d1d1d6}.btn:focus-visible{box-shadow:var(--focus-ring);outline:none}.btn:disabled{opacity:.4;cursor:not-allowed;pointer-events:none}.info-card{margin-top:var(--space-6);background:var(--surface);border:1px solid var(--border-soft);border-radius:var(--radius-md);padding:var(--space-5)}.info-grid{gap:var(--space-4);grid-template-columns:repeat(auto-fit,minmax(140px,1fr));display:grid}.info-label{font-size:var(--text-xs);color:var(--muted);letter-spacing:.06em;text-transform:uppercase;margin-bottom:var(--space-1)}.info-value{font-family:var(--font-mono);font-size:var(--text-sm);color:var(--fg)}.info-value.dim{color:var(--muted)}.footer{text-align:center;padding:var(--space-8) 0;color:var(--muted);font-size:var(--text-xs);letter-spacing:.02em;border-top:none}.toast{bottom:var(--space-6);background:var(--surface-warm);color:var(--fg);border:1px solid var(--border);border-radius:var(--radius-pill);padding:var(--space-3) var(--space-6);font-size:var(--text-sm);letter-spacing:.02em;box-shadow:var(--elev-raised);transition:transform var(--motion-base) var(--ease-standard);z-index:100;pointer-events:none;position:fixed;left:50%;transform:translate(-50%)translateY(100px)}.toast.show{transform:translate(-50%)translateY(0)}.nav-link{z-index:1;border-radius:var(--radius-sm);color:var(--muted);font-size:var(--text-sm);font-family:var(--font-body);cursor:pointer;padding:var(--space-2) var(--space-4);letter-spacing:.02em;transition:color var(--motion-fast) var(--ease-standard);background:0 0;border:none;position:relative}.nav-indicator{background:var(--accent);height:2px;transition:left .3s var(--ease-standard), width .3s var(--ease-standard);pointer-events:none;z-index:0;border-radius:1px;position:absolute;bottom:3px;left:0}.nav-link:hover{color:var(--fg)}.nav-link.active{color:var(--accent);font-weight:510}.bg-object-frame{z-index:5;pointer-events:none;border:2px dashed #3d6b6299;border-radius:4px;display:none;position:absolute}.bg-object-frame.visible{pointer-events:auto;display:block}.bg-object-handle{background:var(--accent);border:2px solid #fff;border-radius:2px;width:10px;height:10px;position:absolute;box-shadow:0 1px 4px #0003}.bg-object-handle.tl{top:-5px;left:-5px}.bg-object-handle.tr{top:-5px;right:-5px}.bg-object-handle.bl{bottom:-5px;left:-5px}.bg-object-handle.br{bottom:-5px;right:-5px}@keyframes frameAppear{0%{opacity:0;transform:scale(.96)}to{opacity:1;transform:scale(1)}}.bg-object-copy-btn{z-index:10;color:#fff;font-size:var(--text-xs);font-family:var(--font-body);cursor:pointer;white-space:nowrap;letter-spacing:.01em;transition:background var(--motion-fast) var(--ease-standard), box-shadow var(--motion-fast) var(--ease-standard), transform .15s var(--ease-standard);background:#1a1a1a;border:none;border-radius:10px;align-items:center;gap:6px;padding:7px 18px;font-weight:510;display:none;position:absolute;bottom:-38px;left:50%;transform:translate(-50%);box-shadow:0 2px 12px #00000026}.bg-object-frame.visible .bg-object-copy-btn{display:flex}.bg-object-copy-btn:hover{background:#2d2d2d;transform:translate(-50%)translateY(-1px);box-shadow:0 4px 18px #0003}.bg-object-copy-btn:active{transform:translate(-50%)scale(.97)}.bg-object-copy-btn svg{flex-shrink:0;width:16px;height:16px}.bg-object-copy-btn svg path{fill:currentColor}.bg-hero{text-align:center;padding:0 0 var(--space-8)}.bg-hero-title{letter-spacing:-.02em;color:var(--fg);margin:0 0 var(--space-3);font-size:28px;font-weight:650}.bg-hero-sub{font-size:var(--text-sm);color:var(--muted);letter-spacing:.01em;margin:0;line-height:1.6}.bg-main{max-width:900px;margin:0 auto;padding:0 24px}.bg-canvas{--cb-size:14px;--cb-color-1:#f1f2f4;--cb-color-2:#e9eaed;background-image:linear-gradient(45deg, var(--cb-color-1) 25%, transparent 25%), linear-gradient(-45deg, var(--cb-color-1) 25%, transparent 25%), linear-gradient(45deg, transparent 75%, var(--cb-color-1) 75%), linear-gradient(-45deg, transparent 75%, var(--cb-color-1) 75%);background-size:calc(var(--cb-size) * 2) calc(var(--cb-size) * 2);background-position:0 0, 0 var(--cb-size), var(--cb-size) calc(var(--cb-size) * -1), calc(var(--cb-size) * -1) 0;background-color:var(--cb-color-2);border:1px solid var(--border);width:640px;max-width:100%;height:420px;box-shadow:var(--shadow-md);transition:border-color var(--motion-fast) var(--ease-standard), box-shadow var(--motion-fast) var(--ease-standard), transform .2s var(--ease-standard);border-radius:20px;justify-content:center;align-items:center;margin:0 auto;display:flex;position:relative;overflow:visible}.bg-canvas:hover{border-color:var(--accent);box-shadow:var(--shadow-lg);transform:translateY(-1px)}.bg-canvas-empty{cursor:pointer}.bg-canvas.drag-over{border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in oklab, var(--accent), transparent 70%)}.bg-canvas-placeholder{align-items:center;gap:var(--space-4);color:#6b7280;pointer-events:none;flex-direction:column;display:flex}.bg-canvas-icon{opacity:.55}.bg-canvas-title{font-size:var(--text-lg);letter-spacing:var(--tracking-display);font-weight:560}.bg-canvas-hint{font-size:var(--text-sm);opacity:.65}.bg-canvas-processing{border-radius:inherit;position:absolute;inset:0;overflow:hidden}.bg-canvas-processing img{object-fit:scale-down;width:100%;height:100%}.bg-canvas-overlay{border-radius:inherit;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);background:#00000073;position:absolute;inset:0}.bg-canvas-spinner{justify-content:center;align-items:center;gap:var(--space-3);color:#fff;font-size:var(--text-lg);letter-spacing:var(--tracking-display);flex-direction:column;font-weight:510;display:flex;position:absolute;inset:0}.bg-canvas-spinner svg{animation:.9s linear infinite spin}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.bg-canvas-toggle{z-index:10;background:#0000001a;border-radius:10px;gap:2px;padding:3px;display:none;position:absolute;top:12px;left:12px}.bg-canvas-toggle.visible{display:flex}.bg-compare-btn{z-index:1;font-size:var(--text-xs);font-family:var(--font-body);cursor:pointer;letter-spacing:.01em;color:var(--muted);transition:color var(--motion-fast) var(--ease-standard);background:0 0;border:none;border-radius:8px;padding:6px 14px;position:relative}.bg-compare-btn.selected,.bg-compare-btn:not(.selected):hover{color:var(--fg)}.bg-compare-indicator{height:calc(100% - 6px);transition:left .3s var(--ease-standard), width .3s var(--ease-standard);pointer-events:none;z-index:0;background:#fff;border-radius:7px;position:absolute;top:3px;left:3px;box-shadow:0 1px 3px #00000014,0 0 0 1px #0000000a}.bg-canvas-result{object-fit:scale-down;border-radius:inherit;width:100%;height:100%;position:absolute;inset:0}.bg-canvas-loading{z-index:3;border-radius:inherit;pointer-events:none;background:#ffffff59;justify-content:center;align-items:center;display:flex;position:absolute;inset:0}.bg-canvas-loading svg{color:var(--accent);animation:.9s linear infinite spin}.bg-toolbar{margin-top:var(--space-5);padding:var(--space-5);background:var(--surface);border:1px solid var(--border);box-shadow:var(--shadow-sm);box-sizing:border-box;border-radius:16px;flex-direction:column;gap:0;width:640px;max-width:100%;margin-left:auto;margin-right:auto;display:flex}.bg-toolbar-section{flex-direction:column;gap:0;display:flex}.bg-toolbar-divider{border:none;border-top:1px solid var(--border);margin:var(--space-4) 0}.bg-toolbar-toggle{align-items:center;gap:var(--space-2);padding:var(--space-1) 0;border-radius:var(--radius-sm);color:var(--fg);font-size:var(--text-sm);font-family:var(--font-body);letter-spacing:.02em;cursor:pointer;transition:color var(--motion-fast) var(--ease-standard);-webkit-user-select:none;user-select:none;background:0 0;border:none;align-self:flex-start;display:inline-flex}.bg-toolbar-toggle:hover,.bg-toolbar-toggle.active{color:var(--accent)}.bg-toolbar-toggle-icon{border:1.5px solid var(--muted);width:16px;height:16px;transition:all var(--motion-fast) var(--ease-standard);border-radius:3px;flex-shrink:0;justify-content:center;align-items:center;display:inline-flex}.bg-toolbar-toggle.active .bg-toolbar-toggle-icon{background:var(--accent);border-color:var(--accent)}.bg-toolbar-toggle.active .bg-toolbar-toggle-icon:after{content:"";border:1.5px solid #fff;border-width:0 1.5px 1.5px 0;width:5px;height:8px;display:block;transform:rotate(45deg)translateY(-1px)}.bg-toolbar-panel{transition:grid-template-rows .25s var(--ease-standard);grid-template-rows:0fr;display:grid;overflow:hidden}.bg-toolbar-panel.expanded{padding-top:var(--space-4);grid-template-rows:1fr;overflow:visible}.bg-toolbar-panel-body{min-height:0}.bg-toolbar-sliders{gap:var(--space-2);flex-direction:column;display:flex}.bg-slider-row{align-items:center;gap:var(--space-2);display:flex}.bg-slider-row label{font-size:var(--text-xs);color:var(--muted);white-space:nowrap;min-width:50px}.bg-slider-row input[type=range]{accent-color:var(--accent);cursor:pointer;flex:1;height:3px}.bg-slider-row span{font-family:var(--font-mono);font-size:var(--text-xs);color:var(--fg);text-align:right;min-width:36px}.color-swatches-row{align-items:flex-start;gap:var(--space-2);flex-wrap:wrap;display:flex}.color-group-nav{margin-bottom:var(--space-3);background:#00000008;border-radius:10px;gap:2px;padding:3px;display:inline-flex;position:relative}.color-group-tab{z-index:1;color:var(--muted);font-size:var(--text-xs);font-family:var(--font-body);letter-spacing:.01em;cursor:pointer;transition:color var(--motion-fast) var(--ease-standard);background:0 0;border:none;border-radius:8px;padding:5px 12px;position:relative}.color-group-tab:hover{color:var(--fg)}.color-group-tab.active{color:var(--fg);font-weight:510}.color-group-indicator{border-radius:var(--radius-sm);height:100%;transition:left .3s var(--ease-standard), width .3s var(--ease-standard);pointer-events:none;z-index:0;background:#fff;position:absolute;top:0;left:0;box-shadow:0 1px 3px #00000014,0 0 0 1px #0000000a}.color-group-swatches{display:none}.color-group-swatches.active{gap:var(--space-2);flex-wrap:wrap;display:flex}.btn-more-color{align-items:center;gap:var(--space-1);padding:0 var(--space-3);border:1.5px dashed var(--border);height:34px;color:var(--muted);font-size:var(--text-xs);font-family:var(--font-body);letter-spacing:.01em;cursor:pointer;transition:all var(--motion-fast) var(--ease-standard);white-space:nowrap;background:0 0;border-radius:50px;display:inline-flex}.btn-more-color:hover{border-color:var(--accent);color:var(--accent);background:color-mix(in oklab, var(--accent) 5%, transparent)}.btn-more-color:active{transform:scale(.97)}.color-picker-popover{margin-bottom:var(--space-2);background:var(--surface);border:1px solid var(--border-soft);border-radius:var(--radius-md);padding:var(--space-4);z-index:100;width:260px;position:absolute;bottom:100%;left:0;box-shadow:0 8px 32px #0000001f}.color-picker-sl{border-radius:var(--radius-sm);cursor:crosshair;width:100%;height:140px;margin-bottom:var(--space-3);position:relative}.color-picker-sl-cursor{pointer-events:none;border:2px solid #fff;border-radius:50%;width:14px;height:14px;position:absolute;transform:translate(-50%,-50%);box-shadow:0 0 0 1px #0003,0 2px 6px #00000026}.color-picker-hue{cursor:pointer;background:linear-gradient(90deg,red,#ff0,#0f0,#0ff,#00f,#f0f,red);border-radius:7px;width:100%;height:14px;position:relative}.color-picker-hue-thumb{pointer-events:none;border:2px solid #fff;border-radius:50%;width:16px;height:16px;position:absolute;top:50%;transform:translate(-50%,-50%);box-shadow:0 0 0 1px #00000026}.color-picker-footer{align-items:center;gap:var(--space-3);margin-top:var(--space-3);display:flex}.color-picker-preview{border:1px solid var(--border-soft);border-radius:50%;flex-shrink:0;width:32px;height:32px}.color-picker-hex{font-family:var(--font-mono);font-size:var(--text-sm);border:1px solid var(--border);border-radius:var(--radius-sm);padding:var(--space-2) var(--space-3);color:var(--fg);background:var(--bg);letter-spacing:.02em;text-align:center;flex:1}.color-picker-actions{gap:var(--space-2);margin-top:var(--space-3);display:flex}.bg-toolbar-actions{gap:var(--space-2);padding-top:var(--space-4);align-items:center;display:flex}.bg-error{color:var(--danger);font-size:var(--text-sm);text-align:center;padding:var(--space-4);margin-top:var(--space-4);background:color-mix(in oklab, var(--danger), transparent 90%);border-radius:var(--radius-sm)}.bg-controls-label{font-size:var(--text-sm);color:var(--fg);margin-bottom:var(--space-2)}.color-swatches{gap:var(--space-2);flex-wrap:wrap;display:flex}.color-swatch{cursor:pointer;width:36px;height:36px;transition:all var(--motion-fast) var(--ease-standard);border:2px solid #0000;border-radius:50%;padding:0}.color-swatch:hover{box-shadow:var(--elev-raised);transform:scale(1.12)}.color-swatch.active{border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in oklab, var(--accent), transparent 70%)}.color-swatch-white{border:2px solid var(--border)}.color-swatch-white.active{border-color:var(--accent)}.color-swatch-scene{border:2px solid var(--border)}.color-swatch-scene.active{border-color:var(--accent)}.color-swatch-lightbox,.color-swatch-lightbox-warm,.color-swatch-lightbox-cool,.color-swatch-lightbox-studio,.color-swatch-corner{border:2px solid var(--border)}.color-swatch-lightbox.active,.color-swatch-lightbox-warm.active,.color-swatch-lightbox-cool.active,.color-swatch-lightbox-studio.active,.color-swatch-corner.active{border-color:var(--accent)}.color-swatch-corner{background:linear-gradient(135deg,#f8f5f1 0% 49%,#f1f3f6 49% 100%);position:relative}.color-swatch-corner:after{content:"";background:linear-gradient(#0000,#e1ded9);border-radius:0 0 50% 50%;height:40%;position:absolute;bottom:0;left:0;right:0}.color-swatch-lightbox-warm{background:linear-gradient(#fffbf5,#eee4d7);position:relative}.color-swatch-lightbox-warm:after{content:"";filter:blur(1.5px);background:#8b6d451f;border-radius:50%;width:60%;height:18%;position:absolute;bottom:3px;left:50%;transform:translate(-50%)}.color-swatch-lightbox-cool{background:linear-gradient(#f8fafd,#e4ebf2);position:relative}.color-swatch-lightbox-cool:after{content:"";filter:blur(1.5px);background:#4354691a;border-radius:50%;width:60%;height:18%;position:absolute;bottom:3px;left:50%;transform:translate(-50%)}.color-swatch-lightbox-studio{background:linear-gradient(#f0f0ee,#d2d2ce);position:relative}.color-swatch-lightbox-studio:after{content:"";filter:blur(1.5px);background:#00000024;border-radius:50%;width:60%;height:18%;position:absolute;bottom:3px;left:50%;transform:translate(-50%)}.color-swatch-lightbox{background:linear-gradient(#fff,#ececea);position:relative}.color-swatch-lightbox:after{content:"";filter:blur(1.5px);background:#0000001f;border-radius:50%;width:60%;height:18%;position:absolute;bottom:3px;left:50%;transform:translate(-50%)}.color-swatch-transparent{--cb-size:6px;--cb-color-1:#d5d5d5;--cb-color-2:#eee;background-image:linear-gradient(45deg, var(--cb-color-1) 25%, transparent 25%), linear-gradient(-45deg, var(--cb-color-1) 25%, transparent 25%), linear-gradient(45deg, transparent 75%, var(--cb-color-1) 75%), linear-gradient(-45deg, transparent 75%, var(--cb-color-1) 75%);background-size:calc(var(--cb-size) * 2) calc(var(--cb-size) * 2);background-position:0 0, 0 var(--cb-size), var(--cb-size) calc(var(--cb-size) * -1), calc(var(--cb-size) * -1) 0;background-color:var(--cb-color-2)}.bg-quality-tip{align-items:center;gap:var(--space-3);width:640px;max-width:100%;margin:var(--space-4) auto 0;background:color-mix(in oklab, var(--accent) 8%, transparent);border:1px solid color-mix(in oklab, var(--accent) 15%, transparent);color:var(--accent);font-size:var(--text-sm);letter-spacing:.01em;border-radius:12px;padding:10px 16px;display:flex}.bg-quality-tip-text{flex:1}.bg-quality-tip-btn{border:1px solid color-mix(in oklab, var(--accent) 40%, transparent);color:var(--accent);font-size:var(--text-xs);font-family:var(--font-body);letter-spacing:.01em;cursor:pointer;transition:all var(--motion-fast) var(--ease-standard);white-space:nowrap;background:0 0;border-radius:8px;padding:5px 14px;font-weight:510}.bg-quality-tip-btn:hover{background:var(--accent);color:var(--accent-on)}@media (width<=768px){:root{--container-gutter:16px}.options-bar{flex-direction:column;align-items:flex-start}.options-divider{display:none}.compare-container{min-height:280px}.result-actions{flex-direction:column}.btn{justify-content:center}.header-inner,.bg-main{padding:0 16px}.main{padding:var(--space-6) 0}.bg-canvas{aspect-ratio:640/420;width:100%;height:auto}.bg-toolbar{padding:var(--space-4)}.bg-slider-row{flex-wrap:wrap}.bg-slider-row label{min-width:44px}}.header-right{align-items:center;gap:var(--space-5);display:flex}.header-auth{align-items:center;gap:var(--space-3);display:flex}.header-quota{font-size:var(--text-sm);color:var(--muted)}.header-user{font-size:var(--text-sm);color:var(--fg);text-overflow:ellipsis;white-space:nowrap;max-width:180px;font-weight:500;overflow:hidden}.header-auth-btn{border:1px solid var(--border);background:var(--surface);color:var(--fg);border-radius:var(--radius-sm);font-size:var(--text-sm);font-family:var(--font-body);cursor:pointer;transition:border-color var(--motion-base) var(--ease-standard);padding:6px 14px}.header-auth-btn:hover{border-color:var(--accent);color:var(--accent)}.auth-modal-overlay{background:color-mix(in oklab, var(--fg), transparent 40%);z-index:1000;place-items:center;display:grid;position:fixed;inset:0}.auth-modal{background:var(--surface);border-radius:var(--radius-lg);padding:var(--space-8);width:100%;max-width:360px;box-shadow:var(--elev-raised);position:relative}.auth-modal-close{top:var(--space-3);right:var(--space-3);color:var(--muted);cursor:pointer;background:0 0;border:none;font-size:24px;line-height:1;position:absolute}.auth-modal-title{margin:0 0 var(--space-2);font-size:20px;font-weight:600}.auth-modal-sub{font-size:var(--text-sm);color:var(--muted);margin:0 0 var(--space-6)}.auth-modal-buttons{gap:var(--space-3);flex-direction:column;display:flex}.auth-modal-buttons .btn{justify-content:center;gap:var(--space-2);width:100%}.auth-modal-hint{color:var(--muted);margin:var(--space-4) 0 0;text-align:center;font-size:12px}