:root {
    --color-primary: #027a7d;
    --color-primary-light: #03aaad;
    --color-success: #28a745;
    --color-warning: #ffc107;
    --color-danger: #dc3545;
    --color-bg: #e6efef;
    --color-white: #ffffff;
    --color-text: #1a3333;
    --color-text-muted: #5a7878;
    --color-border: #cce8e8;
    --color-hover: #e8f7f7;
    
    --shadow-sm: 0 1px 2px 0 rgba(3,170,173,0.06);
    --shadow-md: 0 4px 6px -1px rgba(3,170,173,0.12), 0 2px 4px -1px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(3,170,173,0.15), 0 4px 6px -2px rgba(0,0,0,0.05);
    
    --border-radius: 6px;
    --border-radius-lg: 10px;
    --text-muted: #7a9899;
    --border:     #d4e6e7;
    --surface:    #ffffff;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.5;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Utilities */
.hidden { display: none !important; }
.desktop-hidden { display: none; }

/* Header */
.header {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    color: var(--color-white);
    position: sticky;
    top: 0;
    z-index: 50;
    box-shadow: var(--shadow-md);
    padding: 12px 24px;
}
.header__inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
}
.header__brand {
    display: flex;
    align-items: center;
    gap: 14px;
}
.header__logo {
    height: 44px;
    width: auto;
    object-fit: contain;
    filter: drop-shadow(0 1px 3px rgba(0,0,0,0.25));
    flex-shrink: 0;
}
.header__brand-text {
    display: flex;
    flex-direction: column;
}
.header__title {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0;
}
.header__subtitle {
    font-size: 0.875rem;
    opacity: 0.8;
    margin: 0;
}

/* Top Navigation */
.topnav {
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
    position: sticky;
    top: 75px;
    z-index: 40;
}
.topnav__inner {
    display: flex;
    align-items: center;
    gap: 0;
    max-width: 1500px;
    margin: 0 auto;
    padding: 0 20px;
}
.topnav__item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 20px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-muted);
    text-decoration: none;
    border-bottom: 3px solid transparent;
    transition: all 0.2s ease;
}
.topnav__item:hover {
    color: var(--color-primary);
    background: var(--color-hover);
}
.topnav__item--active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
    font-weight: 600;
}

/* Layout */
.layout {
    max-width: 1500px;
    margin: 20px auto;
    padding: 0 20px;
    flex: 1;
    width: 100%;
}

.layout--single {
    display: block;
}

/* Horizontal Filter Card */
.filter-card {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    margin-bottom: 24px;
    overflow: hidden;
    position: relative;
    z-index: 10;
}

.filter-card__header {
    padding: 14px 20px;
    background: linear-gradient(to right, #f8fafc, #ffffff);
    border-bottom: 1px solid var(--color-border);
}

.filter-card__title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-primary);
    margin: 0;
}

.filter-card__body {
    padding: 20px;
}

.filter-grid {
    display: grid;
    gap: 16px;
}

.filter-grid--top {
    grid-template-columns: 2fr 1fr 1fr 1fr;
    margin-bottom: 16px;
}

/* Min-quantity field — always visible including mobile */
.form-group--minqty {
    min-width: 130px;
}

.filter-grid--bottom {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    padding-top: 16px;
    border-top: 1px dashed var(--color-border);
}

.filter-card__footer {
    padding: 12px 20px;
    background-color: var(--color-hover);
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: flex-start;
    gap: 12px;
}

.btn--lg {
    padding: 10px 28px;
    font-size: 0.95rem;
}

/* Forms */
.form-group {
    margin-bottom: 16px;
}
.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 6px;
    color: var(--color-text);
}
.form-input, .form-select {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-family: inherit;
    font-size: 0.875rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}
.form-input:focus, .form-select:focus {
    outline: none;
    border-color: var(--color-primary-light);
    box-shadow: 0 0 0 3px rgba(3, 170, 173, 0.15);
}
.form-row {
    display: flex;
    align-items: center;
    gap: 8px;
}
.form-separator {
    color: var(--color-text-muted);
}
.form-divider {
    height: 1px;
    background-color: var(--color-border);
    margin: 20px 0;
}

/* Buttons */
.btn {
    padding: 8px 16px;
    border-radius: var(--border-radius);
    font-weight: 500;
    font-size: 0.875rem;
    cursor: pointer;
    border: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    transition: all 0.2s;
    white-space: nowrap;
}
.btn--primary {
    background-color: var(--color-primary-light);
    color: var(--color-white);
    box-shadow: 0 2px 4px rgba(3,170,173,0.25);
}
.btn--primary:hover {
    background-color: #028e91;
    box-shadow: 0 4px 12px rgba(3,170,173,0.4);
    transform: translateY(-1px);
}
.btn--primary:active {
    transform: translateY(0);
    box-shadow: 0 1px 3px rgba(3,170,173,0.3);
}
.btn--secondary {
    background-color: var(--color-white);
    border: 1px solid #a0d4d5;
    color: var(--color-text);
}
.btn--secondary:hover {
    background-color: #d0f0f0;
    border-color: #6ecbcc;
    color: #025a5c;
    transform: translateY(-1px);
    box-shadow: 0 2px 6px rgba(3,170,173,0.15);
}
.btn--secondary:active {
    transform: translateY(0);
    background-color: #b8e8e8;
}

/* Excel Button - Microsoft Excel Green Tone */
.btn--excel {
    background-color: #107c41;
    color: #ffffff;
    border: 1px solid #0b5c30;
    padding: 7px 16px;
    font-size: 0.85rem;
    font-weight: 600;
    white-space: nowrap;
    gap: 8px;
    box-shadow: 0 2px 4px rgba(16,124,65,0.3);
    flex: 0 0 auto;
}
.btn--excel:hover {
    background-color: #0a6534;
    border-color: #074525;
    box-shadow: 0 4px 12px rgba(16,124,65,0.45);
    transform: translateY(-1px);
}
.btn--excel:active {
    transform: translateY(0);
    box-shadow: 0 1px 4px rgba(16,124,65,0.3);
}
.btn--excel svg {
    flex-shrink: 0;
}

/* Main Area */
.main {
    display: flex;
    flex-direction: column;
    gap: 16px;
    min-width: 0; /* for grid overflow */
}

/* Tabs */
.tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 8px;
    position: relative;
    z-index: 10;
}
.tab {
    padding: 8px 16px;
    border-radius: 20px;
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}
.tab:hover {
    background-color: #d0f5f5;
    border-color: #4dd0d3;
    color: var(--color-primary);
    transform: translateY(-1px);
    box-shadow: 0 2px 6px rgba(3,170,173,0.15);
}
.tab--active {
    background-color: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
    box-shadow: 0 2px 8px rgba(3,170,173,0.3);
}
.tab--active:hover {
    background-color: #028e91;
    color: #ffffff;
    transform: translateY(-1px);
    box-shadow: 0 4px 10px rgba(3,170,173,0.35);
}

/* Stats */
.stats-bar {
    display: flex;
    align-items: center;
    gap: 20px;
    background: var(--color-white);
    padding: 12px 20px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    flex-wrap: wrap;
}
.stats-bar__controls {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 12px;
}
.page-size-select {
    width: auto;
    padding: 6px 12px;
    font-size: 0.875rem;
}
.stats-bar__item strong {
    color: var(--color-primary);
}

/* Table */
.table-wrapper {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: auto;
    max-height: calc(100vh - 280px);
    border: 1px solid var(--color-border);
}
.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8rem;
    white-space: nowrap;
}

/* Header */
.table thead {
    position: sticky;
    top: 0;
    z-index: 10;
}
.table th {
    padding: 9px 12px;
    background: var(--color-primary);
    color: var(--color-white);
    font-weight: 600;
    font-size: 0.75rem;
    letter-spacing: 0.3px;
    text-transform: uppercase;
    border-right: 1px solid var(--color-primary-light);
    text-align: left;
    white-space: nowrap;
}
.table th:last-child { border-right: none; }

/* Body cells — có đường kẻ ô đồng bộ */
.table td {
    padding: 7px 12px;
    border-right: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    text-align: left;
    vertical-align: middle;
    color: var(--color-text);
    line-height: 1.45;
}
.table td:last-child { border-right: none; }



/* Hover */
.table tbody tr:hover td {
    background-color: var(--color-hover) !important;
    transition: background-color 0.12s ease;
}

/* Row highlight khi click */
.table tbody tr.selected td {
    background-color: var(--color-border) !important;
}

.table__th { /* Base class giữ lại cho tương thích */ }

/* Column specific */
.td-stt      { width: 42px; text-align: center; color: var(--color-text-muted); font-size: 0.72rem; }
.td-number   { text-align: right; font-variant-numeric: tabular-nums; }
.td-price    { text-align: right; font-weight: 700; color: var(--color-success); font-variant-numeric: tabular-nums; }
.td-desc     { white-space: normal; min-width: 180px; max-width: 280px; line-height: 1.4; font-size: 0.75rem; }
.td-location { white-space: normal; min-width: 120px; color: var(--color-text-muted); }

/* Mobile Cards */
.cards-container {
    display: none;
    flex-direction: column;
    gap: 16px;
}
.result-card {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    font-size: 0.875rem;
}
.result-card strong {
    color: var(--color-primary);
}

/* States */
.empty-state, .error-state {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--color-border);
    padding: 40px 20px;
    text-align: center;
    box-shadow: var(--shadow-sm);
}
.error-state {
    color: var(--color-danger);
}
#btn-retry { margin-top: 16px; flex: 0 0 auto; display: inline-flex; }

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(255, 255, 255, 0.8);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 100;
    backdrop-filter: blur(2px);
}
.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 12px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    padding: 16px 0;
    flex-wrap: wrap;
}
.pagination button {
    padding: 6px 12px;
    border: 1px solid var(--color-border);
    background: var(--color-white);
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 0.875rem;
}
.pagination button:hover:not(:disabled) {
    background: var(--color-hover);
}
.pagination button.active {
    background: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}
.pagination button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ===== FOOTER ===== */
.footer {
  margin-top: 24px;
  text-align: center;
  padding: 16px;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
  background: var(--surface);
}

/* Responsive */

@media (max-width: 767px) {
    .table-wrapper {
        display: none;
    }
    .cards-container {
        display: flex;
    }
    .stats-bar {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
    .stats-bar__item:last-child {
        margin-left: 0 !important;
        width: 100%;
    }
    .tabs {
        flex-wrap: nowrap;
        overflow-x: auto;
        padding-bottom: 8px;
    }
    .tab {
        white-space: nowrap;
    }

    /* Mobile filter: hide advanced fields by default */
    .mobile-hidden {
        display: none !important;
    }
    .desktop-hidden {
        display: block !important;
    }
    .mobile-advanced-filters {
        display: none !important;
    }
    .mobile-advanced-filters.expanded {
        display: grid !important;
    }
    .mobile-only {
        display: flex !important;
    }
    /* On mobile: keyword takes full width, min-quantity below it */
    .filter-grid--top {
        grid-template-columns: 1fr 1fr;
    }
    .form-group--keyword {
        grid-column: 1 / -1;
    }
}

/* Toggle advanced button - desktop hidden, mobile shown */
.btn-toggle-advanced {
    display: none;
    width: 100%;
    margin-top: 12px;
    padding: 8px 16px;
    background: transparent;
    border: 1px dashed var(--color-primary-light);
    border-radius: var(--border-radius);
    color: var(--color-primary-light);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    gap: 6px;
    transition: all 0.2s;
}
.btn-toggle-advanced:hover {
    background: rgba(3, 170, 173, 0.06);
}
.btn-toggle-advanced.active {
    border-color: var(--color-primary);
    color: var(--color-primary);
}
.mobile-only {
    display: none;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: var(--color-bg);
}
::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

    /* Ngăn chặn iPhone / iOS Safari tự động phóng to (zoom) trang web khi bấm vào các ô nhập văn bản */
    @media screen and (max-width: 768px) {
      input[type="text"],
      input[type="number"],
	  input[type="search"],
      textarea {
        font-size: 16px !important;
      }
    }