:root{--bg:#f3f5f9;--card-bg:#fff;--text:#1f2937;--muted:#6b7280;--border:#d1d5db;--accent:#0f766e;--accent-strong:#115e59;--danger:#b91c1c;--ok:#166534}*{box-sizing:border-box}body,html{margin:0;padding:0;color:var(--text);background:radial-gradient(circle at top,#dbeafe 0,var(--bg) 40%,#e5e7eb 100%);font-family:Hiragino Kaku Gothic ProN,Hiragino Sans,Yu Gothic,sans-serif}.page{min-height:100vh;display:flex;align-items:flex-start;justify-content:center;padding:32px 16px}.card{width:min(1100px,100%);background:var(--card-bg);border-radius:16px;padding:24px;box-shadow:0 18px 40px rgba(15,23,42,.12)}h1{margin-bottom:8px;font-size:1.6rem}h1,h2{margin-top:0}h2{margin-bottom:12px}.lead{color:var(--muted);margin-top:0}.form-shell{display:grid;grid-gap:16px;gap:16px}.reception-status{border:1px solid var(--border);border-radius:10px;padding:12px;background:#f9fafb}.reception-status.open{border-color:#5eead4;background:#f0fdfa}.reception-status.closed{border-color:#fecaca;background:#fff1f2}.success-box{border:1px solid #86efac;background:#f0fdf4;border-radius:10px;padding:12px}.error-message{color:var(--danger);margin:0}fieldset{border:0;margin:0;padding:0;display:grid;grid-gap:16px;gap:16px}.grid-2{grid-gap:12px;grid-template-columns:repeat(2,minmax(0,1fr))}.grid-2,.grid-3{display:grid;gap:12px}.grid-3{grid-gap:12px;grid-template-columns:repeat(3,minmax(0,1fr))}.full-width{grid-column:1/-1}label{display:grid;grid-gap:6px;gap:6px}input,label{font-size:.95rem}input{border:1px solid var(--border);border-radius:8px;padding:8px 10px}.stage-card{border:1px solid var(--border);border-radius:12px;padding:14px;display:grid;grid-gap:14px;gap:14px}.age-row{display:flex;gap:12px}.age-row label{flex:1 1}.slot-status{font-size:.8rem;color:var(--muted)}.slot-uploading{color:#b45309}.slot-success{color:var(--ok)}.slot-error{color:var(--danger)}.submit-row{display:flex;justify-content:space-between;align-items:center;gap:16px}button{border:0;border-radius:10px;padding:10px 16px;background:var(--accent);color:#fff;font-weight:700;cursor:pointer}button:disabled{cursor:not-allowed;background:#94a3b8}@media (max-width:900px){.grid-2,.grid-3{grid-template-columns:1fr}.submit-row{flex-direction:column;align-items:stretch}}