:root{--bg: #f4f4f8;--surface: #ffffff;--text: #18181b;--text-secondary: #71717a;--text-tertiary: #a1a1aa;--border: #e4e4e7;--border-hover: #d4d4d8;--accent: #0d9488;--accent-2: #0b7f74;--accent-hover: #0f766e;--accent-subtle: rgba(13, 148, 136, .09);--accent-glow: rgba(13, 148, 136, .22);--danger: #ef4444;--danger-bg: rgba(239, 68, 68, .08);--header-bg-top: #1c1c22;--header-bg-bottom: #18181b;--radius: 14px;--radius-sm: 10px;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .04);--shadow: 0 1px 2px rgba(24, 24, 27, .06), 0 6px 20px rgba(24, 24, 27, .05);--shadow-lg: 0 2px 4px rgba(24, 24, 27, .08), 0 12px 32px rgba(24, 24, 27, .08);--ease: cubic-bezier(.2, .8, .2, 1)}*,*:before,*:after{box-sizing:border-box;margin:0}html,body,#root{width:100%;min-height:100vh}body{font-family:Inter,system-ui,-apple-system,sans-serif;font-size:14px;line-height:1.5;color:var(--text);background-color:var(--bg);background-image:radial-gradient(ellipse 60% 50% at 15% 0%,rgba(13,148,136,.07),transparent 60%),radial-gradient(ellipse 50% 40% at 100% 20%,rgba(45,212,191,.04),transparent 60%);background-attachment:fixed;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.app{display:flex;flex-direction:column;min-height:100vh}.header{position:sticky;top:0;z-index:10;background:linear-gradient(180deg,var(--header-bg-top),var(--header-bg-bottom));border-bottom:1px solid rgba(255,255,255,.04);box-shadow:0 1px #ffffff0a,0 8px 24px #00000014;-webkit-backdrop-filter:saturate(1.1);backdrop-filter:saturate(1.1)}.header-inner{max-width:1200px;margin:0 auto;padding:0 24px;height:56px;display:flex;align-items:center;justify-content:space-between;gap:16px}.logo{display:flex;align-items:center;gap:10px;color:#fff;font-weight:600;font-size:15px;letter-spacing:-.01em}.logo svg{color:var(--accent);opacity:.95;filter:drop-shadow(0 0 8px var(--accent-glow))}.badge{display:flex;align-items:center;gap:6px;min-width:128px;justify-content:center;font-size:12px;font-weight:500;padding:5px 12px;border-radius:20px;transition:background .2s var(--ease),color .2s var(--ease)}.badge-wait{background:#ffffff14;color:#ffffffb8}.badge-ok{background:#4ade801f;color:#4ade80;box-shadow:0 0 0 1px #4ade8026 inset}.badge-err{background:#ef444424;color:#f87171}.backend-tag{font-size:10px;font-weight:700;letter-spacing:.04em;padding:1px 5px;border-radius:4px;background:#ffffff1a;color:#ffffffa6;margin-left:2px}.badge-progress{display:block;width:54px;height:3px;background:#ffffff26;border-radius:2px;overflow:hidden;margin-left:4px}.badge-progress-fill{display:block;height:100%;background:linear-gradient(90deg,var(--accent),#2dd4bf);border-radius:2px;transition:width .2s var(--ease)}.disclaimer{background:#0d948814;border-bottom:1px solid rgba(13,148,136,.18);color:var(--text-secondary);font-size:12px;text-align:center;padding:8px 24px;line-height:1.5}.disclaimer strong{color:var(--accent);font-weight:600}.main{flex:1;padding:28px 24px 40px}.workspace{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:start}.banner{max-width:1200px;margin:0 auto 16px;display:flex;align-items:center;gap:10px;padding:10px 14px;border-radius:var(--radius-sm);background:var(--danger-bg);border:1px solid rgba(239,68,68,.18);color:var(--danger);font-size:13px}.banner-msg{flex:1}.banner-close{background:none;border:none;color:inherit;opacity:.7;cursor:pointer;padding:2px 6px;font-size:16px;line-height:1;border-radius:4px}.banner-close:hover{opacity:1;background:#ef44441a}.banner-inline{margin-bottom:0}.card{position:relative;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);transition:transform .26s var(--ease),box-shadow .26s var(--ease)}.card:before{content:"";position:absolute;inset:0 1px auto 1px;height:1px;background:linear-gradient(90deg,transparent,rgba(255,255,255,.9),transparent);border-radius:var(--radius) var(--radius) 0 0;pointer-events:none}.card h2{font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.08em;color:var(--text-secondary);margin-bottom:18px}.card.left{display:flex;flex-direction:column;gap:18px}.card.left h2{margin-bottom:0}@media (prefers-reduced-motion: no-preference){.card:hover{transform:translateY(-1px);box-shadow:var(--shadow-lg)}}.upload-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}.upload-zone{display:flex;flex-direction:column;gap:6px}.upload-label{font-size:11px;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.06em}.upload-area{position:relative;display:flex;align-items:center;justify-content:center;aspect-ratio:4 / 3;border:1.5px dashed var(--border-hover);border-radius:var(--radius-sm);background:linear-gradient(180deg,#fafafb,#f4f4f8);cursor:pointer;overflow:hidden;transition:border-color .2s var(--ease),background .2s var(--ease),box-shadow .2s var(--ease),transform .2s var(--ease)}.upload-area:hover{border-color:var(--accent);background:linear-gradient(180deg,#f7fffe,#f0fdfb)}.upload-area.drag-over{border-color:var(--accent);background:var(--accent-subtle);box-shadow:0 0 0 4px var(--accent-glow),0 8px 24px #0d94882e}@media (prefers-reduced-motion: no-preference){.upload-area.drag-over{transform:scale(1.005)}}.upload-area.filled{border-style:solid;border-color:var(--border);background:#fafafa}.upload-area.filled:hover{border-color:var(--accent)}.thumb{width:100%;height:100%;object-fit:contain;padding:4px;animation:fadeIn .22s var(--ease)}@keyframes fadeIn{0%{opacity:0;transform:scale(.985)}to{opacity:1;transform:scale(1)}}.placeholder{display:flex;flex-direction:column;align-items:center;gap:8px;color:var(--text-tertiary);font-size:13px;pointer-events:none}.clear-btn{position:absolute;top:6px;right:6px;width:22px;height:22px;border-radius:50%;border:none;background:#18181bb8;color:#fff;font-size:14px;line-height:1;cursor:pointer;display:flex;align-items:center;justify-content:center;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);opacity:0;transition:opacity .16s var(--ease),background .16s var(--ease)}.upload-area.filled:hover .clear-btn,.clear-btn:focus-visible{opacity:1}.clear-btn:hover{background:var(--danger)}.filename{font-size:11px;color:var(--text-tertiary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%}.sample-row{display:flex;gap:6px;flex-wrap:wrap;align-items:center}.sample-row-label{font-size:10px;color:var(--text-tertiary);text-transform:uppercase;letter-spacing:.05em;margin-right:2px}.sample-thumb{width:28px;height:28px;border-radius:6px;border:1px solid var(--border);background:var(--bg);padding:0;cursor:pointer;overflow:hidden;transition:transform .15s var(--ease),border-color .15s var(--ease),box-shadow .15s var(--ease)}.sample-thumb img{width:100%;height:100%;object-fit:cover;display:block}.sample-thumb:hover{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent-subtle)}@media (prefers-reduced-motion: no-preference){.sample-thumb:hover{transform:translateY(-1px)}}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}.control-group{display:flex;flex-direction:column;gap:10px;padding:14px 16px;background:linear-gradient(180deg,#fafafc,#f4f4f8);border-radius:var(--radius-sm);border:1px solid var(--border)}.control-helper{font-size:11px;color:var(--text-tertiary);margin-top:-4px;margin-bottom:4px;line-height:1.5}.control-row{display:flex;justify-content:space-between;align-items:center}.control-label{font-size:13px;font-weight:500;color:var(--text);display:flex;align-items:center;gap:8px}.live-dot{width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 0 var(--accent-glow)}@media (prefers-reduced-motion: no-preference){.live-dot{animation:pulse 1.6s var(--ease) infinite}}@keyframes pulse{0%,to{box-shadow:0 0 0 0 var(--accent-glow);opacity:1}50%{box-shadow:0 0 0 5px #0d948800;opacity:.6}}.control-value{font-size:13px;font-weight:600;color:var(--accent);font-variant-numeric:tabular-nums}.slider{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:100%;height:6px;border-radius:3px;background:linear-gradient(90deg,var(--accent) 0%,var(--accent) var(--fill, 0%),var(--border) var(--fill, 0%),var(--border) 100%);outline:none;border:none;padding:0}.slider::-webkit-slider-thumb{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:18px;height:18px;border-radius:50%;background:var(--accent);border:2px solid #fff;box-shadow:0 1px 4px #00000026,0 0 0 0 var(--accent-glow);cursor:pointer;transition:transform .12s var(--ease),box-shadow .18s var(--ease)}.slider::-webkit-slider-thumb:hover{transform:scale(1.15)}.slider:focus-visible::-webkit-slider-thumb{box-shadow:0 1px 4px #00000026,0 0 0 5px var(--accent-glow)}.slider::-moz-range-thumb{width:18px;height:18px;border-radius:50%;background:var(--accent);border:2px solid #fff;box-shadow:0 1px 4px #00000026;cursor:pointer}.btn-primary{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;height:46px;border:none;border-radius:var(--radius-sm);background:linear-gradient(180deg,var(--accent),var(--accent-2));color:#fff;font-size:14px;font-weight:600;font-family:inherit;cursor:pointer;box-shadow:0 1px 2px #0b7f7433,0 8px 24px #0d948838;transition:transform .16s var(--ease),box-shadow .2s var(--ease),filter .16s var(--ease),opacity .16s var(--ease)}@media (prefers-reduced-motion: no-preference){.btn-primary:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 2px 4px #0b7f7440,0 14px 32px #0d948847;filter:brightness(1.04)}.btn-primary:active:not(:disabled){transform:translateY(0);box-shadow:inset 0 2px 4px #00000026;filter:brightness(.96)}}.btn-primary:disabled{opacity:.42;cursor:not-allowed;box-shadow:none}.btn-primary:focus-visible{outline:none;box-shadow:0 0 0 4px var(--accent-glow)}.btn-ghost{display:inline-flex;align-items:center;gap:5px;padding:6px 11px;border:1px solid var(--border);border-radius:8px;background:var(--surface);color:var(--text);font-size:12px;font-weight:500;font-family:inherit;cursor:pointer;transition:border-color .15s var(--ease),background .15s var(--ease)}.btn-ghost:hover{border-color:var(--border-hover);background:var(--bg)}.segmented{display:inline-flex;border:1px solid var(--border);border-radius:8px;padding:2px;background:var(--bg)}.segmented button{padding:4px 10px;border:none;background:transparent;color:var(--text-secondary);font-size:12px;font-weight:500;font-family:inherit;border-radius:6px;cursor:pointer;transition:color .15s var(--ease),background .15s var(--ease)}.segmented button.active{background:var(--surface);color:var(--text);box-shadow:0 1px 2px #0000000d}.output-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:18px;flex-wrap:wrap}.output-top h2{margin-bottom:0}.output-actions{display:flex;gap:8px;align-items:center}.output-area{position:relative;min-height:340px;border-radius:var(--radius-sm);border:1px solid var(--border);background-color:var(--bg);background-image:linear-gradient(45deg,#ededf2 25%,transparent 25%),linear-gradient(-45deg,#ededf2 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#ededf2 75%),linear-gradient(-45deg,transparent 75%,#ededf2 75%);background-size:18px 18px;background-position:0 0,0 9px,9px -9px,-9px 0;overflow:hidden;display:flex;align-items:center;justify-content:center}.output-canvas{display:none;max-width:100%;max-height:540px;object-fit:contain;border-radius:4px}.output-canvas.visible{display:block}@media (prefers-reduced-motion: no-preference){.output-canvas.visible{animation:rise .36s var(--ease)}}@keyframes rise{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.output-placeholder{display:flex;flex-direction:column;align-items:center;gap:14px;padding:48px 24px;color:var(--text-tertiary);font-size:13px;text-align:center;line-height:1.6;background:#f4f4f8c7;border-radius:8px;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;padding:10px;width:100%}.compare-cell{display:flex;flex-direction:column;align-items:center;gap:6px}.compare-cell img,.compare-cell canvas{max-width:100%;max-height:480px;object-fit:contain;border-radius:6px;background:var(--surface);box-shadow:var(--shadow-sm)}.compare-label{font-size:10px;text-transform:uppercase;letter-spacing:.08em;color:var(--text-tertiary);font-weight:600}.resize-hint{margin-top:10px;font-size:11px;color:var(--text-tertiary);text-align:center}.spinner{display:inline-block;width:16px;height:16px;border:2px solid rgba(255,255,255,.25);border-top-color:#fff;border-radius:50%;animation:spin .7s var(--ease) infinite}.spinner.sm{width:12px;height:12px;border-width:1.5px;border-color:#ffffff4d;border-top-color:#fffc}.spinner.lg{width:30px;height:30px;border-width:2.5px;border-color:var(--border);border-top-color:var(--accent);animation-duration:.9s}@keyframes spin{to{transform:rotate(360deg)}}@media (max-width: 860px){.main{padding:20px 16px 32px}.workspace{grid-template-columns:1fr;gap:16px}.compare-grid{grid-template-columns:1fr}}@media (max-width: 520px){.main{padding:14px 12px 28px}.upload-row{grid-template-columns:1fr}.header-inner{padding:0 16px}.card{padding:16px}}