:root{--bg: #f4f4f2;--panel: #ffffff;--ink: #1d1d1b;--muted: #6b6b66;--line: #d9d9d4;--accent: #0b5fff;--accent-ink: #ffffff;--warn-bg: #fff6d6;--warn-ink: #6b4d00;--err-bg: #ffe3e0;--err-ink: #8a1c10;--ok-bg: #e2f5e6;--ok-ink: #145a2a;color-scheme:light}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.5 system-ui,-apple-system,Segoe UI,Roboto,sans-serif}.wrap{max-width:720px;margin:0 auto;padding:32px 16px 48px}h1{font-size:1.6rem;margin:0 0 4px}h2{font-size:1.15rem;margin:0 0 12px}.sub{margin:0;color:var(--muted)}.demo{margin:8px 0 0;padding:6px 10px;background:var(--warn-bg);color:var(--warn-ink);border-radius:6px;display:inline-block}.panel{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:20px;margin-top:20px}.drop{border:2px dashed var(--line);border-radius:10px;padding:36px 16px;text-align:center;cursor:pointer;transition:border-color .15s,background .15s}.drop:hover,.drop:focus-visible,.drop.over{border-color:var(--accent);background:#f3f7ff;outline:none}.drop-inner{display:flex;flex-direction:column;gap:4px;color:var(--muted)}.drop-inner strong{color:var(--ink);font-size:1.05rem}.file-name{color:var(--ink);font-weight:600;margin-top:8px;word-break:break-all}.row{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:16px}.row>label:first-child,.row>span:first-child{min-width:110px;color:var(--muted)}select{font:inherit;padding:8px 10px;border:1px solid var(--line);border-radius:6px;background:#fff;min-width:240px;max-width:100%}.radios{display:flex;flex-wrap:wrap;gap:14px}.radios label{display:inline-flex;align-items:center;gap:6px}.primary{display:inline-block;margin-top:20px;padding:10px 18px;font:inherit;font-weight:600;color:var(--accent-ink);background:var(--accent);border:0;border-radius:8px;cursor:pointer;text-decoration:none}.primary:disabled{opacity:.45;cursor:not-allowed}.secondary{display:inline-block;margin-top:20px;padding:10px 18px;font:inherit;font-weight:600;color:var(--accent);background:#fff;border:1px solid var(--accent);border-radius:8px;cursor:pointer;text-decoration:none}.actions{display:flex;flex-wrap:wrap;gap:12px}.status{margin:12px 0 0;min-height:1.5em;color:var(--muted)}.status.error{color:var(--err-ink)}.facts{display:grid;grid-template-columns:max-content 1fr;gap:4px 16px;margin:0}.facts dt{color:var(--muted)}.facts dd{margin:0}.warnings{list-style:none;padding:0;margin:12px 0 0;display:grid;gap:6px}.warnings li{background:var(--warn-bg);color:var(--warn-ink);padding:8px 10px;border-radius:6px}.preflight{margin-top:12px}.preflight .ok{background:var(--ok-bg);color:var(--ok-ink);padding:8px 10px;border-radius:6px}.preflight ul{list-style:none;padding:0;margin:0;display:grid;gap:6px}.preflight li.error{background:var(--err-bg);color:var(--err-ink);padding:8px 10px;border-radius:6px}.preflight li.warn{background:var(--warn-bg);color:var(--warn-ink);padding:8px 10px;border-radius:6px}footer{margin-top:24px;color:var(--muted)}@media(max-width:480px){.wrap{padding:20px 16px 40px}.facts{grid-template-columns:1fr}}