:root {
    --bg-main: #F3F4F6;
    /* Xám rất nhẹ cho nền trang */
    --bg-secondary: #FFFFFF;
    /* Trắng tinh cho thẻ nội dung (Card) */
    --text-primary: #111827;
    /* Đen đậm cho chữ chính */
    --text-secondary: #4B5563;
    /* Xám đậm cho chữ phụ */
    --border-color: #E5E7EB;
    /* Đường viền mảnh, nhẹ */
    --accent-color: #2563EB;
    /* Màu xanh nhấn (Primary Blue) */
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --radius: 12px;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-main);
    color: var(--text-primary);
    margin: 0;
    padding: 10px 20px;
    /* Giảm padding trên dưới */
    line-height: 1.6;
    font-size: 18px;
    /* Tăng kích thước chữ cơ bản */
}

h1,
h2,
h3 {
    color: var(--accent-color);
    margin-bottom: 0px;
    
}

/* Container & Cards */
.container {
    max-width: 1400px;
    /* Kéo giãn sang ngang */
    margin: 0 auto;
}

.card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: var(--shadow);
}

.section-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--accent-color);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 8px;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
}

/* Form Styles */
.form-group {
    margin-bottom: 15px;
}

label {
    display: block;
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 5px;
    font-size: 1rem;
}

input,
textarea,
select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    color: var(--text-primary);
    background-color: #fff;
    box-sizing: border-box;
    transition: border-color 0.2s, box-shadow 0.2s;
}

input:focus,
textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Buttons */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background-color: var(--accent-color);
    color: white;
}

.btn-primary:hover {
    background-color: #2563EB;
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: white;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

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

.btn-action {
    width: 45px;
    height: 45px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    padding: 0 !important;
}

/* DataTables Overrides */
table.dataTable {
    border-collapse: collapse !important;
    width: 100% !important;
    margin: 0 !important;
}

/* Top Scrollbar Styles */
#top-scroll-container {
    background: #f8f9fa;
    border-bottom: 1px solid var(--border-color);
    border-top: 1px solid var(--border-color);
}

#top-scroll-container::-webkit-scrollbar {
    height: 10px;
}

#top-scroll-container::-webkit-scrollbar-track {
    background: #f1f1f1;
}

#top-scroll-container::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 10px;
}

#top-scroll-container::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

/* Stats Inline Styles */
.stats-inline {
    display: flex;
    gap: 25px;
    align-items: center;
}

.stat-item {
    font-size: 1rem;
    color: var(--text-primary);
    white-space: nowrap;
    padding: 5px 10px;
    background: #fff;
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

.stat-item b {
    color: var(--primary-color);
    font-size: 1.1rem;
}

/* Horizontal Scroll Adjustments */
.dataTables_scrollBody {
    border-bottom: 1px solid var(--border-color);
}

table.dataTable thead th, 
table.dataTable tbody td {
    white-space: nowrap; /* Không cho rớt dòng để kích hoạt cuộn ngang */
    padding: 15px 20px !important;
}

/* Thao tác column width */
table.dataTable thead th:first-child,
table.dataTable tbody td:first-child {
    min-width: 160px;
    position: sticky;
    left: 0;
    z-index: 2;
    background-color: var(--bg-secondary);
}

table.dataTable thead th:first-child {
    background-color: var(--bg-main) !important;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    align-items: center;
    justify-content: center;
}

.modal-content {
    background-color: white;
    margin: 0;
    padding: 30px;
    border-radius: var(--radius);
    width: 90%;
    box-shadow: var(--shadow);
    position: relative;
    max-height: 90vh;
    overflow-y: auto;
}

#detailModal .modal-content,
#viewHistoryModal .modal-content {
    width: 600px;
    /* Tăng lên 600 để bảng bảo trì dễ nhìn hơn */
    height: 600px;
    aspect-ratio: 1 / 1;
    display: flex;
    flex-direction: column;
}

#formModal .modal-content,
#qrModal .modal-content {
    width: 900px;
    height: 750px;
    display: flex;
    flex-direction: column;
}

#formModal .tab-content {
    flex: 1;
    overflow-y: auto;
}

.close {
    position: absolute;
    right: 20px;
    top: 15px;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    color: var(--text-secondary);
}

.close:hover {
    color: var(--accent-color);
}

/* Table in Detail View */
.detail-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
    font-size: 1rem;
}

.detail-table th,
.detail-table td {
    border: 1px solid var(--border-color);
    padding: 8px 12px;
    text-align: left;
}

.detail-table th {
    background-color: var(--bg-main);
    color: var(--text-secondary);
}

/* Tab system */
.tabs-header {
    display: flex;
    gap: 10px;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 20px;
}

.tab-btn {
    padding: 10px 20px;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    font-weight: 600;
    color: var(--text-secondary);
    transition: all 0.3s ease;
}

.tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}


table.dataTable thead th {
    background-color: var(--bg-main) !important;
    color: var(--text-secondary) !important;
    border-bottom: 1px solid var(--border-color) !important;
    padding: 15px !important;
}

table.dataTable tbody td {
    padding: 12px 15px !important;
    border-bottom: 1px solid var(--border-color) !important;
}

/* Cấu hình border rõ ràng cho table */
table.dataTable.cell-border thead th,
table.dataTable.cell-border tbody td {
    border: 1px solid #9ca3af !important; /* Đậm màu để rõ khung từng trường */
}

table.dataTable.cell-border thead th {
    border-bottom: 2px solid #6b7280 !important; /* Header border dưới đậm hơn */
    background-color: #f3f4f6 !important;
}

/* Đảm bảo cột sticky có border phải rõ ràng */
table.dataTable.cell-border tbody td:first-child,
table.dataTable.cell-border thead th:first-child {
    border-right: 2px solid #6b7280 !important;
}

/* Detail View Styles */
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.info-item .label {
    font-size: 1rem;
    color: var(--text-secondary);
}

.info-item .value {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1.1rem;
}

/* Table Controls Layout */
.table-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    width: 100%;
}

.left-controls {
    display: flex;
    align-items: center;
    gap: 30px;
}

.dataTables_length,
.dataTables_filter {
    margin: 0 !important;
    float: none !important;
}

.dataTables_filter label,
.dataTables_length label {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 0;
    white-space: nowrap;
}

.dataTables_filter input {
    width: 250px !important;
}

.filter-input {
    width: 165px !important;
    height: 45px !important;
    font-size: 14px !important;
    padding: 0 12px !important;
    margin: 0 !important;
    border-radius: 8px !important;
    border: 1px solid var(--border-color) !important;
    display: inline-flex !important; /* Thay đổi thành inline-flex để đồng nhất button/input */
    align-items: center !important;
    justify-content: center !important;
    box-sizing: border-box !important;
    color: #000000 !important; /* Đen tuyệt đối */
    background-color: #ffffff !important;
    vertical-align: top !important; /* Dùng top kết hợp với flex container */
    line-height: normal !important;
}

/* Đồng nhất màu chữ cho ô tìm kiếm */
#custom_search {
    color: #000000 !important;
}

#custom_search::placeholder {
    color: #94a3b8 !important;
}

/* Override Select2 to match filter-input */
.select2-container--default .select2-selection--single {
    width: 165px !important;
    height: 45px !important;
    border-radius: 8px !important;
    border: 1px solid var(--border-color) !important;
    display: flex !important;
    align-items: center !important;
    background-color: #ffffff !important;
    margin: 0 !important;
    padding: 0 !important;
}

.select2-container--default .select2-selection--single .select2-selection__rendered {
    font-size: 14px !important;
    line-height: 43px !important; /* Thấp hơn 2px để bù cho border */
    padding-left: 12px !important;
    color: #000000 !important; /* Đen tuyệt đối cho ô Khoa */
    text-align: left !important;
    width: 100% !important;
    font-weight: normal !important;
}

.select2-container--default .select2-selection--single .select2-selection__placeholder {
    color: #94a3b8 !important;
}

.select2-container--default .select2-selection--single .select2-selection__arrow {
    height: 43px !important;
}

/* Style the Select2 Dropdown Menu */
.select2-dropdown {
    width: 165px !important;
    border: 1px solid var(--border-color) !important;
    border-radius: 8px !important;
    box-shadow: var(--shadow) !important;
    background-color: #fff !important;
    font-size: 14px !important;
    z-index: 9999;
}

.select2-results__option {
    padding: 10px 12px !important;
}

.select2-container--default .select2-results__option--highlighted[aria-selected] {
    background-color: var(--accent-color) !important;
}

.select2-search--dropdown {
    padding: 8px !important;
}

.select2-search--dropdown .select2-search__field {
    border: 1px solid var(--border-color) !important;
    border-radius: 4px !important;
    outline: none !important;
}
/* Responsive Mobile Styles */
@media (max-width: 768px) {
    body {
        padding: 5px;
        font-size: 16px;
    }

    .container {
        padding: 10px;
    }

    .table-controls {
        flex-direction: column;
        align-items: stretch;
        gap: 15px;
    }

    .left-controls {
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
    }

    .dataTables_filter input,
    .dataTables_length select {
        width: 100% !important;
    }

    .modal-content {
        width: 95% !important;
        padding: 15px;
        max-height: 95vh;
    }

    #detailModal .modal-content,
    #viewHistoryModal .modal-content {
        width: 95% !important;
        height: 90vh !important;
        aspect-ratio: auto !important;
    }

    .info-grid {
        grid-template-columns: 1fr !important;
    }

    .tabs-header {
        overflow-x: auto;
        white-space: nowrap;
        padding-bottom: 5px;
    }

    .tab-btn {
        padding: 10px;
        font-size: 14px;
    }

    /* Force table horizontal scroll */
    .dataTables_wrapper {
        overflow-x: auto;
    }
    
    table.dataTable {
        font-size: 14px;
    }
    
    table.dataTable thead th,
    table.dataTable tbody td {
        padding: 8px !important;
    }
}

@media (max-width: 768px) {
    .right-controls button {
        width: 100%;
        justify-content: center;
    }
}