:root{--primary-color:#3b82f6;--primary-hover:#2563eb;--bg-color:#f3f4f6;--card-bg:#fff;--text-main:#1f2937;--text-muted:#6b7280;--border-color:#e5e7eb;--success-color:#10b981;--danger-color:#ef4444}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-color);color:var(--text-main);font-family:Inter,Noto Sans JP,sans-serif;line-height:1.5}button{cursor:pointer;font-family:inherit}.app-container{max-width:800px;min-height:100vh;margin:0 auto;padding:20px}.header{text-align:center;margin-bottom:24px}.header h1{color:var(--primary-color);margin-bottom:8px;font-size:24px}.header p{color:var(--text-muted);font-size:14px}.controls{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;margin-bottom:24px;display:flex}.category-filter{flex-wrap:wrap;flex:1;gap:8px;display:flex}.category-btn{border:1px solid var(--border-color);background:var(--card-bg);white-space:nowrap;color:var(--text-muted);border-radius:20px;padding:6px 12px;font-size:14px;transition:all .2s}.category-btn:hover{background:var(--bg-color)}.category-btn.active{background:var(--primary-color);color:#fff;border-color:var(--primary-color)}.add-btn{background:var(--primary-color);color:#fff;border:none;border-radius:8px;align-items:center;gap:6px;padding:8px 16px;font-size:14px;font-weight:500;transition:background .2s;display:flex}.add-btn:hover{background:var(--primary-hover)}.snippets-grid{grid-template-columns:1fr;gap:16px;display:grid}.snippet-card{background:var(--card-bg);border:1px solid var(--border-color);border-radius:12px;flex-direction:column;gap:12px;padding:16px;transition:transform .2s,box-shadow .2s;display:flex;box-shadow:0 1px 3px #0000000d}.snippet-card:hover{transform:translateY(-2px);box-shadow:0 4px 6px #0000000d}.snippet-header{justify-content:space-between;align-items:center;display:flex}.snippet-category{background:var(--bg-color);color:var(--text-muted);border-radius:4px;padding:4px 8px;font-size:12px;font-weight:500}.snippet-actions{gap:8px;display:flex}.icon-btn{color:var(--text-muted);background:0 0;border:none;border-radius:4px;justify-content:center;align-items:center;padding:4px;transition:all .2s;display:flex}.icon-btn:hover{background:var(--bg-color);color:var(--text-main)}.icon-btn.delete:hover{color:var(--danger-color)}.snippet-text{white-space:pre-wrap;flex-grow:1;font-size:15px}.copy-btn{background:var(--bg-color);border:1px solid var(--border-color);width:100%;color:var(--primary-color);border-radius:8px;justify-content:center;align-items:center;gap:8px;padding:10px;font-weight:600;transition:all .2s;display:flex}.copy-btn:hover{background:var(--primary-color);color:#fff}.copy-btn.copied{background:var(--success-color);border-color:var(--success-color);color:#fff}.modal-overlay{z-index:100;background:#00000080;justify-content:center;align-items:center;padding:20px;display:flex;position:fixed;inset:0}.modal-content{background:var(--card-bg);border-radius:12px;width:100%;max-width:500px;padding:24px;box-shadow:0 10px 25px #0000001a}.modal-content h2{margin-bottom:16px;font-size:18px}.form-group{margin-bottom:16px}.form-group label{color:var(--text-main);margin-bottom:8px;font-size:14px;font-weight:500;display:block}.form-control{border:1px solid var(--border-color);border-radius:8px;width:100%;padding:10px;font-family:inherit;font-size:14px}textarea.form-control{resize:vertical;min-height:100px}.form-control:focus{border-color:var(--primary-color);outline:none;box-shadow:0 0 0 2px #3b82f633}.modal-actions{justify-content:flex-end;gap:12px;margin-top:24px;display:flex}.cancel-btn{border:1px solid var(--border-color);color:var(--text-main);background:0 0;border-radius:8px;padding:8px 16px}.cancel-btn:hover{background:var(--bg-color)}.save-btn{background:var(--primary-color);color:#fff;border:none;border-radius:8px;padding:8px 16px;font-weight:500}.save-btn:hover{background:var(--primary-hover)}.empty-state{text-align:center;color:var(--text-muted);background:var(--card-bg);border:1px dashed var(--border-color);border-radius:12px;padding:40px 20px}.category-settings-btn{color:var(--text-muted);background:0 0;border:1px solid #0000;border-radius:20px;flex-shrink:0;justify-content:center;align-items:center;padding:6px;transition:all .2s;display:flex}.category-settings-btn:hover{background:var(--border-color);color:var(--text-main)}.category-list{flex-direction:column;gap:8px;max-height:300px;margin-top:16px;display:flex;overflow-y:auto}.category-list-item{background:var(--bg-color);border:1px solid var(--border-color);border-radius:8px;justify-content:space-between;align-items:center;padding:8px 12px;display:flex}.category-list-item-content{flex:1;align-items:center;gap:8px;display:flex}.category-list-actions{align-items:center;gap:4px;display:flex}.category-edit-input{border:1px solid var(--primary-color);border-radius:6px;flex:1;padding:6px 10px;font-size:14px}.category-add-form{border-top:1px solid var(--border-color);gap:8px;margin-top:16px;padding-top:16px;display:flex}.category-add-form input{flex:1}

/* 保存場所の注意書きと利用規約へのリンク（2026-09-27 追加） */
.header p.app-notice{margin-top:6px;font-size:12px}
.header p.app-notice a{margin-left:6px;color:var(--primary-color);font-weight:600;white-space:nowrap}