:root{--primary:#1a365d;--accent:#3182ce;--bg:#f7fafc;--panel:#fff;--text:#2d3748;--sub:#718096;--border:#e2e8f0;--error:#e53e3e;--warn:#dd6b20;--success:#38a169}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Hiragino Sans",Meiryo,sans-serif;line-height:1.6}.site-header{background:var(--primary);color:white;padding:16px 32px;display:flex;align-items:center;justify-content:space-between;gap:24px}.site-header h1{font-size:1.2rem;margin:0}.nav{display:flex;gap:16px;align-items:center;flex-wrap:wrap}.nav a,.link-button{color:white;text-decoration:none;background:none;border:0;cursor:pointer;font:inherit}.container{max-width:1080px;margin:36px auto;padding:0 20px}.panel{background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:32px;box-shadow:0 10px 15px rgba(0,0,0,.06)}.btn-primary,.btn-secondary{display:inline-block;border-radius:6px;padding:10px 18px;margin:6px;border:0;text-decoration:none;cursor:pointer;font-weight:700}.btn-primary{background:var(--accent);color:white}.btn-secondary{background:white;color:var(--text);border:1px solid var(--border)}.error{color:var(--error);font-weight:700}.warning{color:var(--warn);font-weight:700}.success{color:var(--success);font-weight:700}.success-box{border:1px solid var(--success);background:#f0fff4;padding:16px;border-radius:8px;margin:16px 0}.inline-form{display:inline}table{width:100%;border-collapse:collapse;margin-top:16px}th,td{padding:10px;border-bottom:1px solid var(--border);text-align:left;vertical-align:top}code{background:#edf2f7;padding:2px 6px;border-radius:4px}dl{display:grid;grid-template-columns:180px 1fr;gap:8px 16px}dt{font-weight:700;color:var(--sub)}