:root{--bg: #f6f7f9;--card: #ffffff;--text: #111827;--muted: #6b7280;--border: #e5e7eb;--primary: #2563eb;--primary-hover: #1d4ed8;--danger: #dc2626;--ok: #16a34a;--radius: 10px}*{box-sizing:border-box}body{margin:0;font-family:ui-sans-serif,system-ui,-apple-system,Hiragino Sans,Noto Sans JP,Segoe UI,Arial,sans-serif;background:var(--bg);color:var(--text)}.container{max-width:980px;margin:0 auto;padding:28px 16px 60px}.header h1{margin:0;font-size:28px}.subtitle{margin:10px 0 0;color:var(--muted);line-height:1.6;font-size:14px}.card{margin-top:16px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:18px;box-shadow:0 10px 25px #0000000a}.grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:14px}.label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px}input[type=file],input[type=number]{width:100%;padding:10px;border:1px solid var(--border);border-radius:10px;background:#fff}.hint{margin:8px 0 0;color:var(--muted);font-size:12px;line-height:1.6}.actions{margin-top:16px;display:flex;gap:10px;justify-content:flex-end}button{border:none;border-radius:10px;padding:10px 14px;cursor:pointer;font-weight:700;font-size:14px;background:var(--primary);color:#fff}button:hover{background:var(--primary-hover)}button:disabled{opacity:.45;cursor:not-allowed}button.secondary{background:#fff;border:1px solid var(--border);color:var(--text)}button.secondary:hover{background:#f9fafb}.status{margin-top:14px;padding:12px;border-radius:12px;border:1px solid var(--border);background:#fff;font-size:14px;line-height:1.6}.status.ok{border-color:#bbf7d0;background:#f0fdf4;color:var(--ok)}.status.error{border-color:#fecaca;background:#fef2f2;color:var(--danger)}.details{margin-top:14px}pre{white-space:pre-wrap;word-break:break-word;margin:10px 0 0;padding:12px;border-radius:10px;border:1px solid var(--border);background:#fafafa;font-size:12px;line-height:1.6}.result{margin-top:10px;display:grid;gap:6px;color:var(--text);font-size:14px}@media(max-width:980px){.grid{grid-template-columns:1fr}}