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

:root {
    --bg-primary: #f5f7fa;
    --bg-secondary: #ffffff;
    --bg-header: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    --text-primary: #333333;
    --text-secondary: #666666;
    --text-light: #ffffff;
    --border-color: #e0e0e0;
    --shadow: 0 5px 15px rgba(0,0,0,0.05);
    --card-bg: #ffffff;
    --hover-bg: #f8f9fa;
    --badge-bg: #e9ecef;
    --input-bg: #ffffff;
    --input-border: #e0e0e0;
    --input-focus: #2a5298;
    --btn-primary: #2a5298;
    --btn-primary-hover: #1e3c72;
    --btn-danger: #dc3545;
    --btn-danger-hover: #c82333;
    --btn-success: #28a745;
    --btn-success-hover: #218838;
    --status-active-bg: #e3f2fd;
    --status-active-text: #1976d2;
    --status-inactive-bg: #ffebee;
    --status-inactive-text: #c62828;
    --status-pending-bg: #fff3e0;
    --status-pending-text: #e65100;
    --error-bg: #ffebee;
    --error-text: #c62828;
    --low-stock-color: #dc3545;
}

[data-theme="dark"] {
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-header: linear-gradient(135deg, #2d2d2d 0%, #1a1a1a 100%);
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-light: #ffffff;
    --border-color: #404040;
    --shadow: 0 5px 15px rgba(0,0,0,0.3);
    --card-bg: #2d2d2d;
    --hover-bg: #3d3d3d;
    --badge-bg: #404040;
    --input-bg: #3d3d3d;
    --input-border: #404040;
    --input-focus: #4a6fa5;
    --btn-primary: #4a6fa5;
    --btn-primary-hover: #5d7eb5;
    --btn-danger: #a13d3d;
    --btn-danger-hover: #b54d4d;
    --btn-success: #2d6a4f;
    --btn-success-hover: #3d8b6a;
    --status-active-bg: #1e3a5f;
    --status-active-text: #8bb9ff;
    --status-inactive-bg: #5f1e1e;
    --status-inactive-text: #ff8b8b;
    --status-pending-bg: #5f4a1e;
    --status-pending-text: #ffd966;
    --error-bg: #5f1e1e;
    --error-text: #ff8b8b;
    --low-stock-color: #ff8b8b;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    padding: 20px;
    transition: background-color 0.3s, color 0.3s;
}

.dashboard-container {
    max-width: 1400px;
    margin: 0 auto;
}

/* Header Styles */
.header {
    background: var(--bg-header);
    color: white;
    padding: 20px;
    border-radius: 15px;
    margin-bottom: 25px;
    box-shadow: var(--shadow);
}

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

.header-top h1 {
    font-size: clamp(1.2rem, 4vw, 1.8rem);
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 0;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 10px;
}

.home-button, .theme-toggle {
    background: rgba(255,255,255,0.2);
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    transition: background 0.3s;
}

.home-button:hover, .theme-toggle:hover {
    background: rgba(255,255,255,0.3);
}

.last-update {
    background: rgba(255,255,255,0.2);
    padding: 10px 15px;
    border-radius: 10px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.95rem;
    flex-wrap: wrap;
}

/* Stats Cards */
.stats-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 15px;
    margin-bottom: 25px;
}

.stat-card {
    background: var(--card-bg);
    padding: 15px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 15px;
    transition: transform 0.2s;
}

.stat-card:hover {
    transform: translateY(-2px);
}

.stat-icon {
    width: 45px;
    height: 45px;
    background: var(--bg-primary);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--btn-primary);
    font-size: 1.3rem;
}

.stat-content h3 {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: 5px;
}

.stat-content .value {
    font-size: clamp(1.1rem, 3vw, 1.8rem);
    font-weight: bold;
    color: var(--text-primary);
    line-height: 1;
}

/* Filter Section */
.filter-section {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 12px;
    margin-bottom: 25px;
    box-shadow: var(--shadow);
}

.filter-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 15px;
}

.filter-header h2 {
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0;
}

.filter-header-right {
    display: flex;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
}

.filter-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
    margin-bottom: 15px;
}

.filter-item {
    display: flex;
    flex-direction: column;
}

.filter-item label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 4px;
}

.filter-item input,
.filter-item select {
    padding: 8px 10px;
    border: 2px solid var(--input-border);
    border-radius: 8px;
    font-size: 0.9rem;
    background: var(--input-bg);
    color: var(--text-primary);
    transition: all 0.3s;
    width: 100%;
}

.filter-item input:focus,
.filter-item select:focus {
    border-color: var(--input-focus);
    outline: none;
}

.filter-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

#filterResultCount {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Table Styles */
.table-container {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.table-wrapper {
    overflow-x: auto;
    margin: 15px 0;
    -webkit-overflow-scrolling: touch;
}

.data-summary {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.data-summary h2 {
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0;
}

.table-controls {
    display: flex;
    gap: 8px;
    align-items: center;
    flex-wrap: wrap;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
    min-width: 1200px;
}

th {
    background: var(--btn-primary);
    color: white;
    padding: 12px 8px;
    text-align: left;
    font-weight: 600;
    white-space: nowrap;
    position: sticky;
    top: 0;
}

td {
    padding: 10px 8px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

tr:hover {
    background: var(--hover-bg);
}

.text-right {
    text-align: right;
}

.low-stock {
    color: var(--low-stock-color);
    font-weight: bold;
}

/* Status Badges */
.status-badge {
    padding: 4px 8px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    display: inline-block;
    white-space: nowrap;
}

.status-active {
    background: var(--status-active-bg);
    color: var(--status-active-text);
}

.status-inactive {
    background: var(--status-inactive-bg);
    color: var(--status-inactive-text);
}

.status-pending {
    background: var(--status-pending-bg);
    color: var(--status-pending-text);
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.loading-overlay.active {
    display: flex;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 5px solid var(--bg-secondary);
    border-top-color: var(--btn-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Buttons */
.btn {
    padding: 8px 16px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--btn-primary);
    color: white;
    white-space: nowrap;
}

.btn:hover {
    background: var(--btn-primary-hover);
    transform: translateY(-1px);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-clear {
    background: var(--btn-danger);
}

.btn-clear:hover {
    background: var(--btn-danger-hover);
}

.btn-export {
    background: var(--btn-success);
}

.btn-export:hover {
    background: var(--btn-success-hover);
}

/* Pagination */
.pagination {
    margin-top: 20px;
    display: flex;
    justify-content: center;
    gap: 5px;
    flex-wrap: wrap;
}

.pagination .btn {
    padding: 6px 12px;
    min-width: 36px;
}

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

/* Badges */
.badge {
    background: var(--badge-bg);
    padding: 4px 8px;
    border-radius: 20px;
    font-size: 0.8rem;
    color: var(--text-primary);
    white-space: nowrap;
}

/* Error Message */
.error {
    color: var(--error-text);
    background: var(--error-bg);
    padding: 20px;
    border-radius: 10px;
    margin: 20px 0;
    text-align: center;
}

/* Mobile Optimizations */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    .header {
        padding: 15px;
    }

    .header-top h1 {
        font-size: 1.1rem;
    }

    .stat-card {
        padding: 12px;
    }

    .stat-icon {
        width: 35px;
        height: 35px;
        font-size: 1rem;
    }

    .filter-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .filter-header-right {
        width: 100%;
    }

    .filter-header-right .btn-clear {
        width: 100%;
        justify-content: center;
    }

    .filter-grid {
        grid-template-columns: 1fr;
    }

    .filter-info {
        flex-direction: column;
        align-items: stretch;
    }

    .data-summary {
        flex-direction: column;
        align-items: flex-start;
    }

    .table-controls {
        width: 100%;
        flex-direction: column;
        align-items: stretch;
    }

    .table-controls .badge {
        text-align: center;
    }

    .btn-export {
        width: 100%;
        justify-content: center;
    }

    .pagination {
        gap: 3px;
    }

    .pagination .btn {
        padding: 6px 8px;
        min-width: 32px;
        font-size: 0.8rem;
    }
}

/* Small phones */
@media (max-width: 480px) {
    .stats-cards {
        grid-template-columns: 1fr 1fr;
    }

    .stat-content h3 {
        font-size: 0.75rem;
    }

    .badge {
        font-size: 0.7rem;
    }
}