.app{max-width:1200px;margin:0 auto;padding:24px 16px 48px}.app-header{text-align:center;padding:32px 0 24px}.app-header h1{font-size:1.75rem;font-weight:700;letter-spacing:-.02em}.app-header p{color:var(--text-secondary);font-size:.875rem;margin-top:4px}.app-main{display:flex;flex-direction:column;gap:24px}.upload-section{display:grid;grid-template-columns:1fr 1fr;gap:16px}@media(max-width:640px){.upload-section{grid-template-columns:1fr}}.uploader{display:flex;flex-direction:column;gap:8px}.uploader-label{font-size:.875rem;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.05em}.uploader-zone{border:2px dashed var(--border);border-radius:var(--radius);padding:48px 16px;text-align:center;cursor:pointer;transition:border-color .15s,background .15s;background:var(--surface);color:var(--text-secondary);font-size:.875rem}.uploader-zone:hover{border-color:var(--primary);background:#f0f7ff}.uploader-zone--dragging{border-color:var(--primary);background:#e8f2ff}.uploader-preview{position:relative;border-radius:var(--radius);overflow:hidden;background:var(--surface);box-shadow:var(--shadow);display:flex;flex-direction:column;align-items:center}.uploader-preview img{max-width:100%;max-height:200px;object-fit:contain;display:block}.uploader-clear{position:absolute;top:8px;right:8px;background:#00000080;color:#fff;border:none;border-radius:50%;width:28px;height:28px;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:14px;line-height:1;transition:background .15s}.uploader-clear:hover{background:#000000b3}.uploader-info{padding:8px;font-size:.75rem;color:var(--text-secondary)}.controls{display:flex;flex-wrap:wrap;gap:16px;padding:16px;background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow);align-items:flex-start}.control-group{display:flex;flex-direction:column;gap:4px;min-width:120px}.control-group label{font-size:.8125rem;font-weight:600;color:var(--text-secondary)}.control-value{font-weight:700;color:var(--text);font-variant-numeric:tabular-nums}.control-hint{font-size:.75rem;color:var(--text-secondary)}.control-group input[type=range]{accent-color:var(--primary);width:100%}.control-color{display:flex;align-items:center;gap:8px}.control-color input[type=color]{width:32px;height:32px;border:1px solid var(--border);border-radius:4px;cursor:pointer;padding:2px}.control-color span{font-size:.75rem;font-family:monospace;color:var(--text-secondary)}.control-checkbox{display:flex;align-items:center;gap:8px;cursor:pointer}.control-checkbox input[type=checkbox]{accent-color:var(--primary);width:16px;height:16px}@media(max-width:640px){.controls{flex-direction:column}}.preview{display:grid;grid-template-columns:1fr;gap:16px}.preview-card{background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}.preview-title{font-size:.8125rem;font-weight:600;color:var(--text-secondary);padding:12px 16px 0}.preview-canvas{padding:16px;display:flex;align-items:center;justify-content:center;min-height:200px}.preview-canvas img{max-width:100%;max-height:480px;object-fit:contain;display:block;border:1px solid var(--border);border-radius:4px}.preview-canvas--mask{background-image:linear-gradient(45deg,#e5e5e5 25%,transparent 25%),linear-gradient(-45deg,#e5e5e5 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#e5e5e5 75%),linear-gradient(-45deg,transparent 75%,#e5e5e5 75%);background-size:20px 20px;background-position:0 0,0 10px,10px -10px,-10px 0}.preview-empty{color:var(--text-secondary);font-size:.875rem}.stats{display:flex;gap:16px;justify-content:center}.stat{background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px 24px;text-align:center;display:flex;flex-direction:column;min-width:120px}.stat-value{font-size:1.5rem;font-weight:700;font-variant-numeric:tabular-nums}.stat-label{font-size:.75rem;color:var(--text-secondary);margin-top:2px}@media(max-width:640px){.stats{flex-wrap:wrap}.stat{flex:1;min-width:0}}.notice{padding:10px 16px;background:#fef3c7;color:#92400e;border-radius:var(--radius);font-size:.8125rem}.error{padding:10px 16px;background:#fee2e2;color:#991b1b;border-radius:var(--radius);font-size:.8125rem}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #f8f9fa;--surface: #fff;--border: #e5e7eb;--text: #1f2937;--text-secondary: #6b7280;--primary: #3b82f6;--primary-hover: #2563eb;--error: #ef4444;--warning: #f59e0b;--radius: 8px;--shadow: 0 1px 3px rgba(0, 0, 0, .08)}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.5;min-height:100vh}