/* ============================================
   CSS Variables & Theme
   ============================================ */
:root {
    --primary: #0D47A1;
    --primary-light: #1565C0;
    --accent: #FF6B35;
    --success: #27ae60;
    --error: #e74c3c;
    --warning: #f39c12;
    --info: #3498db;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f5f6fa;
    --bg-tertiary: #eeecf1;
    
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --text-hint: #95a5a6;
    
    --border-color: #e1e8ed;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.15);
    
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
}

/* ============================================
   Reset & Base Styles
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
}

/* ============================================
   Typography
   ============================================ */
h1 { font-size: 2rem; font-weight: 700; }
h2 { font-size: 1.5rem; font-weight: 700; }
h3 { font-size: 1.25rem; font-weight: 600; }
h4 { font-size: 1rem; font-weight: 600; }
h5 { font-size: 0.875rem; font-weight: 600; }

p { color: var(--text-secondary); }

a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover { color: var(--primary-light); }

/* ============================================
   Login Page
   ============================================ */
.login-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: var(--spacing-md);
}

.login-card {
    background: var(--bg-primary);
    border-radius: 12px;
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
}

.login-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.login-header h1 {
    color: var(--primary);
    margin-bottom: var(--spacing-xs);
}

.login-header p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.login-form {
    margin-bottom: var(--spacing-lg);
}

.login-footer {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ============================================
   Dashboard Layout
   ============================================ */
.dashboard-page {
    display: flex;
    min-height: 100vh;
    background: var(--bg-secondary);
}

.dashboard-container {
    display: flex;
    width: 100%;
}

/* ============================================
   Sidebar
   ============================================ */
.sidebar {
    width: 280px;
    background: var(--primary);
    color: white;
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    z-index: 1000;
}

.sidebar-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.sidebar-header h2 {
    font-size: 1.5rem;
    margin: 0;
}

.badge-admin {
    background: var(--accent);
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 700;
}

.sidebar-menu {
    flex: 1;
    padding: var(--spacing-md) 0;
}

.menu-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    color: rgba(255, 255, 255, 0.7);
    transition: all 0.3s ease;
    cursor: pointer;
}

.menu-item:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.menu-item.active {
    background: var(--accent);
    color: white;
    font-weight: 600;
    border-left: 4px solid white;
    padding-left: calc(var(--spacing-lg) - 4px);
}

.menu-item .icon {
    margin-right: var(--spacing-md);
    font-size: 1.25rem;
}

.sidebar-footer {
    padding: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.admin-info {
    padding: 0 var(--spacing-md) var(--spacing-md);
    color: rgba(255, 255, 255, 0.8);
}

.admin-info p {
    margin: 0;
    color: white;
    font-weight: 600;
}

.admin-info small {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.7);
}

/* ============================================
   Main Content
   ============================================ */
.main-content {
    flex: 1;
    margin-left: 280px;
    padding: var(--spacing-lg);
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: 8px;
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow);
}

.topbar h1 {
    margin: 0;
    font-size: 1.75rem;
}

.topbar-actions {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.search-input {
    padding: 10px 16px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    width: 250px;
    font-size: 0.875rem;
}

.content {
    min-height: calc(100vh - 200px);
}

.section {
    display: none;
}

.section.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* ============================================
   Stats Grid
   ============================================ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.stat-card {
    background: var(--bg-primary);
    border-radius: 8px;
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    color: white;
}

.stat-content {
    flex: 1;
}

.stat-label {
    margin: 0;
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    font-weight: 600;
}

.stat-value {
    margin: var(--spacing-xs) 0 0;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
}

/* ============================================
   Cards
   ============================================ */
.card {
    background: var(--bg-primary);
    border-radius: 8px;
    padding: var(--spacing-lg);
    box-shadow: var(--shadow);
    margin-bottom: var(--spacing-lg);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    gap: var(--spacing-md);
}

.card-header h3 {
    margin: 0;
}

.filter-group {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
    flex-wrap: wrap;
}

.filter-group select,
.filter-group input {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.875rem;
}

/* ============================================
   Tables
   ============================================ */
.table-responsive {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.table thead {
    background: var(--bg-secondary);
    border-bottom: 2px solid var(--border-color);
}

.table th {
    padding: var(--spacing-md);
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
}

.table td {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

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

.table tbody tr.status-pending { background: rgba(243, 156, 18, 0.05); }
.table tbody tr.status-approved { background: rgba(39, 174, 96, 0.05); }
.table tbody tr.status-rejected { background: rgba(231, 76, 60, 0.05); }

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

/* ============================================
   Buttons
   ============================================ */
.btn {
    padding: 10px 16px;
    border: none;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

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

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

.btn-primary:hover {
    background: var(--primary-light);
}

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

.btn-success:hover {
    background: #229954;
}

.btn-danger {
    background: var(--error);
    color: white;
}

.btn-danger:hover {
    background: #c0392b;
}

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

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

.btn-sm {
    padding: 6px 12px;
    font-size: 0.75rem;
}

.btn-block {
    width: 100%;
}

/* ============================================
   Forms
   ============================================ */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.875rem;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.875rem;
    font-family: inherit;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(13, 71, 161, 0.1);
}

.error-message {
    color: var(--error);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md);
    background: rgba(231, 76, 60, 0.1);
    border-radius: 6px;
    border-left: 4px solid var(--error);
}

.success-message {
    color: var(--success);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md);
    background: rgba(39, 174, 96, 0.1);
    border-radius: 6px;
    border-left: 4px solid var(--success);
}

/* ============================================
   Modals
   ============================================ */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.3s ease;
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background-color: var(--bg-primary);
    border-radius: 12px;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: var(--spacing-lg);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

/* ============================================
   Status Badges
   ============================================ */
.badge {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.badge-pending {
    background: rgba(243, 156, 18, 0.2);
    color: var(--warning);
}

.badge-approved {
    background: rgba(39, 174, 96, 0.2);
    color: var(--success);
}

.badge-rejected {
    background: rgba(231, 76, 60, 0.2);
    color: var(--error);
}

.badge-active {
    background: rgba(39, 174, 96, 0.2);
    color: var(--success);
}

.badge-suspended {
    background: rgba(231, 76, 60, 0.2);
    color: var(--error);
}

.badge-delivered {
    background: rgba(39, 174, 96, 0.2);
    color: var(--success);
}

.badge-in-progress {
    background: rgba(52, 152, 219, 0.2);
    color: var(--info);
}

/* ============================================
   Charts
   ============================================ */
.chart-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-lg);
}

.chart-placeholder {
    height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border-radius: 8px;
}

/* ============================================
   Pending List
   ============================================ */
.pending-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.pending-item {
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: 6px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-left: 4px solid var(--warning);
}

.pending-item-info h4 {
    margin: 0;
    font-size: 0.95rem;
}

.pending-item-info p {
    margin: 4px 0 0;
    font-size: 0.8rem;
}

.pending-item-actions {
    display: flex;
    gap: var(--spacing-sm);
}

/* ============================================
   Analytics Summary
   ============================================ */
.analytics-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.summary-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: 6px;
}

.summary-row span {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.summary-row strong {
    font-size: 1.25rem;
    color: var(--primary);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1200px) {
    .chart-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
}

@media (max-width: 768px) {
    .sidebar {
        width: 0;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }

    .sidebar.mobile-open {
        width: 280px;
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
        padding: var(--spacing-md);
    }

    .topbar {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .topbar-actions {
        width: 100%;
        flex-direction: column;
    }

    .search-input {
        width: 100%;
    }

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

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

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

    .filter-group {
        width: 100%;
    }

    .filter-group select,
    .filter-group input {
        flex: 1;
        min-width: 0;
    }

    .table {
        font-size: 0.75rem;
    }

    .table th,
    .table td {
        padding: var(--spacing-sm);
    }

    .modal-content {
        width: 95%;
    }

    .analytics-summary {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }

    .topbar h1 {
        font-size: 1.25rem;
    }

    .table-responsive {
        font-size: 0.7rem;
    }

    .btn {
        padding: 8px 12px;
        font-size: 0.75rem;
    }

    .stat-card {
        padding: var(--spacing-md);
    }

    .stat-icon {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
    }

    .stat-value {
        font-size: 1.25rem;
    }
}