* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Malgun Gothic", sans-serif;
    background: #f7f7f8;
    color: #222;
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 24px;
    background: #2b2f38;
    color: #fff;
}

.topbar .brand {
    color: #fff;
    text-decoration: none;
    font-weight: 700;
    font-size: 18px;
}

.user-area {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
}

.container {
    max-width: 1000px;
    margin: 24px auto;
    padding: 0 16px;
}

.layout {
    display: flex;
    gap: 24px;
}

.sidebar {
    width: 200px;
    flex-shrink: 0;
}

.sidebar h2 {
    font-size: 15px;
    color: #666;
    margin-bottom: 8px;
}

.category-list {
    list-style: none;
    margin: 0 0 16px;
    padding: 0;
}

.category-list li {
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-radius: 6px;
}

.category-list li.active,
.category-list li:hover {
    background: #e5e7eb;
}

.category-list li a {
    display: block;
    padding: 8px 10px;
    color: #333;
    text-decoration: none;
}

.category-list li .category-name {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.category-count {
    color: #999;
    font-size: 12px;
}

.category-delete-form {
    flex-shrink: 0;
    margin-right: 6px;
}

.category-delete {
    flex-shrink: 0;
    font: inherit;
    font-size: 12px;
    color: #dc2626;
    background: #fef2f2;
    border: none;
    padding: 4px 10px;
    border-radius: 999px;
    cursor: pointer;
}

.category-delete:hover {
    background: #fee2e2;
}

.category-delete:disabled {
    color: #ccc;
    background: transparent;
    cursor: not-allowed;
}

.category-form {
    display: flex;
    gap: 6px;
}

.category-form input {
    flex: 1;
    min-width: 0;
    padding: 6px 8px;
    border: 1px solid #ddd;
    border-radius: 6px;
}

.content {
    flex: 1;
    background: #fff;
    border-radius: 10px;
    padding: 20px 24px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.content-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.memo-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.memo-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 4px;
    border-bottom: 1px solid #eee;
}

.memo-title {
    color: #222;
    text-decoration: none;
    font-weight: 600;
}

.memo-meta {
    display: flex;
    gap: 10px;
    font-size: 13px;
    color: #888;
}

.memo-category {
    background: #eef2ff;
    color: #4338ca;
    padding: 2px 8px;
    border-radius: 999px;
}

.empty {
    color: #888;
}

.memo-form {
    display: flex;
    flex-direction: column;
    gap: 6px;
    max-width: 640px;
}

.memo-form label {
    font-size: 13px;
    color: #666;
    margin-top: 8px;
}

.memo-form input,
.memo-form select,
.memo-form textarea {
    padding: 8px 10px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font: inherit;
}

.form-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 16px;
}

.back-to-list {
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid #eee;
}

.btn-primary {
    background: #4338ca;
    color: #fff;
    border: none;
    padding: 8px 16px;
    border-radius: 6px;
    text-decoration: none;
    cursor: pointer;
    font-size: 14px;
}

.btn-link {
    color: #666;
    text-decoration: none;
}

.btn-danger {
    color: #dc2626;
    text-decoration: none;
    margin-left: auto;
}

.auth-content {
    max-width: 400px;
    margin: 40px auto;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.auth-form label {
    font-size: 13px;
    color: #666;
    margin-top: 8px;
}

.auth-form input {
    padding: 8px 10px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font: inherit;
}

.error {
    background: #fef2f2;
    color: #b91c1c;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 14px;
}