:root{color-scheme:light dark;--bg: #f7f7f8;--surface: #ffffff;--border: #e0e0e3;--text: #1a1a1e;--muted: #6b6b74;--accent: #4f46e5;--accent-contrast: #ffffff;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}@media (prefers-color-scheme: dark){:root{--bg: #17171a;--surface: #1f1f23;--border: #313136;--text: #ececef;--muted: #9a9aa2;--accent: #818cf8;--accent-contrast: #14142b}}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text)}#app{max-width:720px;margin:0 auto;padding:2rem 1.25rem 4rem}header h1{margin-bottom:.25rem}.subtitle{color:var(--muted);line-height:1.5}.hidden{display:none!important}.panel{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:1.25rem 1.5rem;margin-top:1rem}.panel h2{margin-top:0;font-size:1.05rem}.drop-zone{border:2px dashed var(--border);border-radius:12px;padding:2rem;text-align:center;margin-top:1.5rem;transition:border-color .15s ease,background .15s ease}.drop-zone.drag-over{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 8%,transparent)}.file-picker{display:inline-block;cursor:pointer;padding:.5rem 1rem;border-radius:8px;background:var(--accent);color:var(--accent-contrast);font-weight:600}.file-picker input{display:none}.file-name{color:var(--muted);font-size:.9rem;word-break:break-all}.info-grid{display:grid;grid-template-columns:max-content 1fr;gap:.35rem 1rem;margin:0}.info-grid dt{color:var(--muted)}.info-grid dd{margin:0;font-weight:600}.field{margin-bottom:1.1rem}.field>label{display:block;font-weight:600;margin-bottom:.4rem;font-size:.9rem}.preset-row,.range-row,.radio-row{display:flex;align-items:center;gap:.6rem;flex-wrap:wrap}.preset-btn{border:1px solid var(--border);background:transparent;color:var(--text);padding:.4rem .8rem;border-radius:8px;cursor:pointer}.preset-btn.active{background:var(--accent);border-color:var(--accent);color:var(--accent-contrast)}.preset-custom{display:flex;align-items:center;gap:.4rem;color:var(--muted)}input[type=number]{width:5.5rem;padding:.35rem .5rem;border-radius:6px;border:1px solid var(--border);background:var(--bg);color:var(--text)}.radio-row label{display:flex;align-items:center;gap:.35rem;font-weight:400;font-size:.9rem}.actions{display:flex;gap:.75rem;margin-top:1.25rem}.primary-btn,.secondary-btn{padding:.6rem 1.25rem;border-radius:8px;font-weight:600;cursor:pointer;border:1px solid transparent}.primary-btn{background:var(--accent);color:var(--accent-contrast)}.primary-btn:disabled{opacity:.5;cursor:not-allowed}.secondary-btn{background:transparent;border-color:var(--border);color:var(--text)}.progress-bar{height:10px;border-radius:999px;background:var(--border);overflow:hidden}.progress-fill{height:100%;width:0%;background:var(--accent);transition:width .1s linear}.progress-text{color:var(--muted);font-size:.9rem;margin-bottom:0}.log{margin-top:1rem;font-size:.85rem;color:var(--muted);white-space:pre-wrap}.log .error{color:#dc2626}footer{margin-top:2.5rem;color:var(--muted);font-size:.8rem;text-align:center}