:root{--bg:#f8f9fa;--card:#fff;--text:#1a1a1a;--text-muted:#666;--primary:#2563eb;--primary-hover:#1d4ed8;--danger:#dc2626;--danger-hover:#b91c1c;--border:#e5e7eb;--radius:8px}*{box-sizing:border-box;padding:0;margin:0}body,html{max-width:100vw;min-height:100vh;background:var(--bg);color:var(--text);font-family:Hiragino Kaku Gothic ProN,Hiragino Sans,Meiryo,sans-serif;line-height:1.6}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}.container{max-width:860px;margin:0 auto;padding:24px 20px;width:100%}@media (min-width:768px){.container{padding:32px 24px}}.card{background:var(--card);border-radius:var(--radius);border:1px solid var(--border);padding:24px;margin-bottom:24px;width:100%}@media (min-width:768px){.card{padding:32px 40px}}.card.unsubscribe-card .btn-wrap,.card.unsubscribe-card h1{text-align:center}h1{font-size:1.5rem;margin-bottom:24px}h1,h2{font-weight:600}h2{font-size:1.125rem;margin:20px 0 12px}p{margin-bottom:12px;color:var(--text)}.textMuted{color:var(--text-muted);font-size:.875rem}.btn{display:inline-block;padding:12px 24px;border-radius:var(--radius);font-size:1rem;font-weight:500;cursor:pointer;border:none;text-align:center;transition:background .2s}.btnPrimary{background:var(--primary);color:#fff}.btnPrimary:hover{background:var(--primary-hover)}.btnDanger{background:var(--danger);color:#fff}.btnDanger:hover{background:var(--danger-hover)}.btn:disabled{opacity:.6;cursor:not-allowed}.formGroup{margin-bottom:16px}.formGroup label{display:block;margin-bottom:6px;font-weight:500;font-size:.875rem}.formGroup input{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:var(--radius);font-size:1rem}.formGroup input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 2px rgba(37,99,235,.2)}.alert{padding:12px 16px;border-radius:var(--radius);margin-bottom:16px}.alertError{background:#fef2f2;border:1px solid #fecaca;color:#b91c1c}.alertSuccess{background:#f0fdf4;border:1px solid #bbf7d0;color:#166534}.list{list-style:none}.list li{padding:12px 0;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;gap:12px}.list li:last-child{border-bottom:none}.listActions{display:flex;gap:8px}.listActions button{padding:6px 12px;font-size:.875rem}.admin-card h2{margin-top:2rem;margin-bottom:1rem;line-height:1.65}.admin-card h2:first-of-type{margin-top:0}.admin-card .admin-section{margin-top:2rem;padding-bottom:2rem;border-bottom:1px solid var(--border)}.admin-card .admin-section:first-of-type{margin-top:0}.admin-card .admin-section:last-of-type{border-bottom:none;padding-bottom:0}.admin-card .admin-section h2,.admin-card .admin-section+.admin-section h2{margin-top:0}.admin-card .textMuted,.admin-card p{margin-bottom:1rem;line-height:1.75}.admin-card .formGroup{margin-bottom:1.25rem}.admin-card .formGroup label{margin-bottom:8px}.admin-card .list li{padding:14px 0;line-height:1.7}.admin-card table td,.admin-card table th{padding:12px 10px;line-height:1.65}.admin-card table tbody tr{border-bottom:1px solid var(--border)}.admin-card [role=tablist]{margin-bottom:1.5rem}.admin-card label[style*="cursor: pointer"]{line-height:1.6}