:root{--bg:#f4f6fa;--panel:#fff;--ink:#16213a;--muted:#5d6b86;--line:#dde3ee;--brand:#1f4fd8;--brand-ink:#fff;--ok:#157347;--err:#b42318}*{box-sizing:border-box}body{background:var(--bg);color:var(--ink);margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.45}.shell{max-width:1180px;margin:0 auto;padding:24px 16px 56px}.head h1{margin:0 0 4px;font-size:1.6rem}.head p{color:var(--muted);margin:0 0 20px}.grid{grid-template-columns:340px 1fr;align-items:start;gap:20px;display:grid}@media (max-width:900px){.grid{grid-template-columns:1fr}}.card{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:16px}.card+.card{margin-top:14px}.card h2{align-items:center;gap:8px;margin:0 0 10px;font-size:1rem;display:flex}.step{background:var(--brand);width:22px;height:22px;color:var(--brand-ink);border-radius:50%;place-items:center;font-size:.75rem;display:inline-grid}label{color:var(--muted);margin:10px 0 4px;font-size:.85rem;display:block}input[type=text],input[type=password],input[type=datetime-local],select{border:1px solid var(--line);width:100%;font:inherit;color:var(--ink);background:#fff;border-radius:8px;padding:9px 10px}input:focus-visible,button:focus-visible{outline:2px solid var(--brand);outline-offset:2px}.file{border:1.5px dashed var(--line);text-align:center;cursor:pointer;color:var(--muted);border-radius:10px;margin:0;padding:14px;font-size:.9rem;display:block}.file:hover{border-color:var(--brand);color:var(--ink)}.file input{display:none}.file strong{color:var(--ink);word-break:break-all}.check{color:var(--ink);align-items:center;gap:8px;margin-top:12px;font-size:.9rem;display:flex}button.primary{background:var(--brand);width:100%;color:var(--brand-ink);font:inherit;cursor:pointer;border:0;border-radius:10px;margin-top:14px;padding:12px;font-weight:600}button.primary:disabled{opacity:.5;cursor:not-allowed}button.ghost{border:1px solid var(--line);cursor:pointer;font:inherit;color:var(--ink);background:#fff;border-radius:8px;padding:6px 12px}button.ghost:disabled{opacity:.4;cursor:not-allowed}.msg{border-radius:8px;margin-top:12px;padding:10px 12px;font-size:.9rem}.msg.err{color:var(--err);background:#fdecea}.msg.ok{color:var(--ok);background:#e7f5ee}.msg a{color:inherit;font-weight:600}.viewer-bar{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;margin-bottom:10px;display:flex}.viewer-bar span{color:var(--muted);font-size:.9rem}.stage{text-align:center;background:#e9edf5;border-radius:10px;min-height:240px;padding:12px;overflow:auto}.paper{touch-action:none;display:inline-block;position:relative;box-shadow:0 2px 12px #141e3c2e}.paper canvas{background:#fff;display:block}.stamp{border:2px solid var(--brand);cursor:grab;color:var(--brand);-webkit-user-select:none;user-select:none;touch-action:none;text-align:center;background:#1f4fd81f;justify-content:center;align-items:center;padding:2px;font-size:.72rem;font-weight:600;display:flex;position:absolute}.stamp:active{cursor:grabbing}.handle{background:var(--brand);cursor:nwse-resize;touch-action:none;border-radius:3px;width:14px;height:14px;position:absolute;bottom:-7px;right:-7px}.empty{color:var(--muted);padding:60px 10px}.note{color:var(--muted);margin-top:10px;font-size:.78rem}.stamp{gap:4px;overflow:visible}