:root {
    --bg-color: #f8f8f8;
    --text-color: #333333;
    --header-bg: #ffffff;
    --sidebar-bg: #ffffff;
    --border-color: #e0e0e0;
    --primary-button-bg: #000000;
    --primary-button-text: #ffffff;
    --secondary-button-bg: #f0f0f0;
    --secondary-button-text: #333333;
    --danger-button-bg: #dc3545;
    --danger-button-text: #ffffff;
    --hover-bg: #f0f0f0;
    --active-bg: #e0e0e0;
    --modal-bg: rgba(0, 0, 0, 0.5);
    --modal-content-bg: #ffffff;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    font-size: 16px;
}

.login-body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: var(--bg-color);
}

.login-container {
    background-color: var(--header-bg);
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    text-align: center;
    width: 100%;
    max-width: 400px;
}

.login-header {
    margin-bottom: 30px;
}

.login-header h1 {
    font-size: 28px;
    margin-top: 15px;
    color: var(--primary-button-bg);
}

.logo {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
}

.login-form .form-group {
    margin-bottom: 20px;
    text-align: left;
}

.login-form label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-color);
}

.login-form input[type="text"],
.login-form input[type="password"] {
    width: calc(100% - 20px);
    padding: 12px 10px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 16px;
    box-sizing: border-box;
}

.button {
    padding: 12px 25px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    transition: background-color 0.2s ease, color 0.2s ease;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.button.primary {
    background-color: var(--primary-button-bg);
    color: var(--primary-button-text);
}

.button.primary:hover {
    background-color: #333333;
}

.button.secondary {
    background-color: var(--secondary-button-bg);
    color: var(--secondary-button-text);
    border: 1px solid var(--border-color);
}

.button.secondary:hover {
    background-color: var(--active-bg);
}

.button.danger {
    background-color: var(--danger-button-bg);
    color: var(--danger-button-text);
}

.button.danger:hover {
    background-color: #c82333;
}

.error-message {
    color: var(--danger-button-bg);
    margin-top: 15px;
    font-size: 14px;
}

/* Dashboard Layout */
.dashboard-container {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 250px;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    padding: 20px 0;
    box-shadow: 2px 0 5px rgba(0, 0, 0, 0.02);
    flex-shrink: 0;
}

.sidebar-header {
    text-align: center;
    margin-bottom: 30px;
    padding: 0 20px;
}

.sidebar-header .logo-small {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 10px;
}

.sidebar-header h2 {
    font-size: 22px;
    color: var(--primary-button-bg);
    margin: 0;
}

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

.nav-item {
    margin-bottom: 5px;
}

.nav-item > a {
    display: block;
    padding: 12px 20px;
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    transition: background-color 0.2s ease;
}

.nav-item > a:hover {
    background-color: var(--hover-bg);
}

.nav-item.active > a {
    background-color: var(--active-bg);
    font-weight: 600;
}

.sub-menu {
    list-style: none;
    padding: 0;
    margin: 0;
    background-color: var(--hover-bg);
    border-top: 1px solid var(--border-color);
}

.sub-menu li a {
    display: block;
    padding: 10px 20px 10px 40px;
    color: var(--text-color);
    text-decoration: none;
    font-size: 15px;
    transition: background-color 0.2s ease;
}

.sub-menu li a:hover {
    background-color: var(--active-bg);
}

.sub-menu li a.active {
    background-color: var(--active-bg);
    font-weight: 600;
}

.main-content {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.main-header {
    background-color: var(--header-bg);
    padding: 20px 30px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.02);
}

.main-header h1 {
    margin: 0;
    font-size: 24px;
    color: var(--primary-button-bg);
}

.content-area {
    padding: 30px;
    flex-grow: 1;
    overflow-y: auto;
}

.toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 25px;
    align-items: center;
}

.search-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.search-group label {
    font-weight: 500;
    white-space: nowrap;
}

.search-group input[type="text"] {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 15px;
    width: 200px;
}

/* Table Styling */
.table-container {
    overflow-x: auto;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--header-bg);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 15px;
    white-space: nowrap;
}

.data-table th,
.data-table td {
    padding: 12px 15px;
    border-bottom: 1px solid var(--border-color);
    text-align: left;
}

.data-table th {
    background-color: var(--hover-bg);
    font-weight: 600;
    color: var(--primary-button-bg);
    position: sticky;
    top: 0;
    z-index: 10;
}

.data-table tbody tr:last-child td {
    border-bottom: none;
}

.data-table tbody tr:hover {
    background-color: var(--hover-bg);
}

.data-table td:last-child {
    text-align: center;
}

.data-table th[data-sort-type] {
    cursor: pointer;
    user-select: none;
}

.data-table th .sort-icon {
    display: inline-block;
    width: 0;
    height: 0;
    margin-left: 5px;
    vertical-align: middle;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    opacity: 0.4;
}

.data-table th.asc .sort-icon {
    border-bottom: 5px solid var(--text-color);
    opacity: 1;
}

.data-table th.desc .sort-icon {
    border-top: 5px solid var(--text-color);
    opacity: 1;
}

.settings-icon {
    cursor: pointer;
    width: 20px;
    height: 20px;
    vertical-align: middle;
    fill: var(--text-color);
    transition: fill 0.2s ease;
}

.settings-icon:hover {
    fill: var(--primary-button-bg);
}

/* Modal Styling */
.modal {
    display: none;
    position: fixed;
    z-index: 100;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: var(--modal-bg);
    justify-content: center;
    align-items: center;
}

.modal-content {
    background-color: var(--modal-content-bg);
    margin: auto;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    width: 90%;
    max-width: 600px;
    position: relative;
    animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

.close-button {
    color: #aaa;
    position: absolute;
    top: 15px;
    right: 25px;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.close-button:hover,
.close-button:focus {
    color: #000;
    text-decoration: none;
}

.modal-content h2 {
    margin-top: 0;
    margin-bottom: 25px;
    color: var(--primary-button-bg);
    font-size: 24px;
}

.modal-content .form-group {
    margin-bottom: 18px;
    text-align: left;
}

.modal-content label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-color);
    font-size: 15px;
}

.modal-content input[type="text"],
.modal-content input[type="number"],
.modal-content textarea {
    width: calc(100% - 20px);
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 15px;
    box-sizing: border-box;
}

.modal-content textarea {
    min-height: 80px;
    resize: vertical;
}

.modal-content button[type="submit"] {
    margin-top: 25px;
    width: auto;
    padding: 10px 20px;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .dashboard-container {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        padding: 15px 0;
    }

    .sidebar-header {
        display: flex;
        align-items: center;
        justify-content: center;
        margin-bottom: 15px;
    }

    .sidebar-header h2 {
        margin-left: 10px;
    }

    .nav-menu {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
    }

    .nav-item {
        margin: 0 10px 10px 10px;
    }

    .nav-item > a {
        padding: 8px 15px;
    }

    .sub-menu {
        display: none;
    }

    .main-header {
        flex-direction: column;
        align-items: flex-start;
        padding: 15px 20px;
    }

    .main-header h1 {
        margin-bottom: 10px;
        font-size: 20px;
    }

    .content-area {
        padding: 20px;
    }

    .toolbar {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .search-group {
        width: 100%;
    }

    .search-group input[type="text"] {
        width: calc(100% - 100px);
    }

    .data-table th,
    .data-table td {
        padding: 10px 12px;
        font-size: 14px;
    }
}

/* 狀態徽章樣式 */
.status-badge {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    text-align: center;
    min-width: 50px;
}

.status-active {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.status-inactive {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* 工具提示樣式 */
.tooltip-icon {
    display: inline-block;
    cursor: pointer;
    font-size: 14px;
    color: #6c757d;
    margin-left: 4px;
}

.tooltip-icon:hover {
    color: #495057;
}

/* Flash 消息樣式 */
.flash-message {
    padding: 12px 20px;
    margin: 10px 0;
    border-radius: 4px;
    font-weight: 500;
}

.flash-message.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.flash-message.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.flash-message.warning {
    background-color: #fff3cd;
    color: #856404;
    border: 1px solid #ffeaa7;
}

.flash-message.info {
    background-color: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

/* 表格中的無數據樣式 */
.no-data {
    text-align: center;
    color: #6c757d;
    font-style: italic;
    padding: 20px;
}

/* 小按鈕樣式 */
.button.small {
    padding: 6px 12px;
    font-size: 14px;
    margin-right: 5px;
}

.button.small:last-child {
    margin-right: 0;
}

/* 表單改進 */
.form-group small {
    display: block;
    margin-top: 4px;
    font-size: 12px;
    color: #6c757d;
}

/* 工具欄右側按鈕組 */
.toolbar-right {
    display: flex;
    align-items: center;
    gap: 15px;
}

/* 分頁控制樣式 */
.pagination-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 20px;
    padding: 15px 0;
    border-top: 1px solid var(--border-color);
}

.pagination-info {
    font-size: 14px;
    color: var(--text-color);
}

.pagination-controls {
    display: flex;
    align-items: center;
    gap: 10px;
}

.page-numbers {
    display: flex;
    gap: 5px;
}

.page-numbers .button {
    min-width: 35px;
    height: 35px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.pagination-controls select {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
    background-color: var(--header-bg);
    color: var(--text-color);
}

.pagination-controls label {
    font-size: 14px;
    color: var(--text-color);
    margin-right: 8px;
}

/* 響應式分頁控制 */
@media (max-width: 768px) {
    .pagination-container {
        flex-direction: column;
        gap: 15px;
        align-items: stretch;
    }
    
    .pagination-controls {
        justify-content: center;
    }
    
    .page-numbers {
        flex-wrap: wrap;
        justify-content: center;
    }
}

.info-icon {
    cursor: pointer;
    color: #1976d2;
    font-size: 18px;
    margin-left: 2px;
    vertical-align: middle;
    transition: color 0.2s;
}

.info-icon:hover {
    color: #0d47a1;
}