:root{--bg: #ffffff;--fg: #1a1a1a;--muted: #6b7280;--border: #d1d5db;--primary: #06c755;--primary-fg: #ffffff;--error: #dc2626;--notice-bg: #fff8e1;--notice-border: #f4c430;--plan-bg: #f5f5f5}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Hiragino Sans,Yu Gothic UI,Noto Sans JP,sans-serif;background:var(--bg);color:var(--fg);line-height:1.5}.container{max-width:480px;margin:0 auto;padding:24px 16px 48px}.page-header h1{font-size:1.25rem;margin:0 0 16px}.plan-card{background:var(--plan-bg);border:1px solid var(--border);border-radius:8px;padding:16px;margin-bottom:16px;text-align:center}.plan-card .plan-label{font-size:.8rem;font-weight:700;color:var(--muted);margin-bottom:4px}.plan-card .plan-price{font-size:1.5rem;font-weight:600}.plan-card .plan-price span{font-size:.9rem;font-weight:400;color:var(--muted)}.plan-card .plan-desc{font-size:.85rem;color:var(--muted);margin-top:4px}.notice{background:var(--notice-bg);border:1px solid var(--notice-border);border-radius:8px;padding:12px 16px;margin-bottom:24px}.notice ul{margin:0;padding-left:18px;font-size:.85rem}.notice li{margin:2px 0}.form{display:grid;gap:20px}.field{display:grid;gap:6px;min-width:0}.field span{font-size:.875rem;color:var(--muted)}.field span em{color:var(--error);font-style:normal;margin-left:2px}.field small{font-size:.75rem;color:var(--muted)}.field input,.field select{width:100%;min-width:0;max-width:100%;padding:10px 12px;font-size:1rem;border:1px solid var(--border);border-radius:8px;background:#fff;color:var(--fg);font-family:inherit}.field input[type=date]{-webkit-appearance:none;-moz-appearance:none;appearance:none}.field input[type=date]::-webkit-date-and-time-value{min-height:1.2em;text-align:left}.field input:focus,.field select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #06c75533}.field-group{border:1px solid var(--border);border-radius:8px;padding:12px 14px;margin:0}.field-group legend{font-size:.875rem;color:var(--muted);padding:0 6px}.field-group legend em{color:var(--error);font-style:normal;margin-left:2px}.field-group .row{display:grid;grid-template-columns:1fr 1fr;gap:12px}.check{display:flex;align-items:flex-start;gap:9px;font-size:.95rem;margin:7px 0;cursor:pointer}.check input[type=checkbox]{width:21px;height:21px;margin-top:1px;flex-shrink:0}.check-note{display:block;margin-left:30px;margin-top:-2px;margin-bottom:14px;font-size:.75rem;color:var(--muted)}.summary{font-size:.9rem;color:var(--muted);background:#f3f4f6;border-radius:6px;padding:8px 12px;margin:0}button[type=submit]{margin-top:8px;padding:14px 16px;font-size:1rem;font-weight:600;color:var(--primary-fg);background:var(--primary);border:none;border-radius:8px;cursor:pointer}button[type=submit]:disabled{opacity:.6;cursor:not-allowed}.error{color:var(--error);font-size:.875rem;margin:0}