/* ── Reset & Variables ── */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #dbeafe;
    --success: #16a34a;
    --success-light: #dcfce7;
    --danger: #dc2626;
    --danger-light: #fee2e2;
    --warning: #d97706;
    --warning-light: #fef3c7;
    --info: #0891b2;
    --info-light: #cffafe;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --sidebar-width: 260px;
    --header-height: 60px;
    --border-radius: 8px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1), 0 4px 6px rgba(0,0,0,0.05);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--gray-50);
    color: var(--gray-800);
    line-height: 1.6;
}

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

.sidebar {
    width: var(--sidebar-width);
    background: var(--gray-900);
    color: white;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: 100;
    transition: transform 0.3s ease;
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--gray-700);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 18px;
    font-weight: 700;
}

.logo i {
    font-size: 24px;
    color: var(--primary);
}

.nav-menu {
    list-style: none;
    padding: 12px 0;
    flex: 1;
    overflow-y: auto;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    cursor: pointer;
    transition: all 0.2s;
    color: var(--gray-400);
    font-size: 14px;
}

.nav-item:hover {
    background: var(--gray-800);
    color: white;
}

.nav-item.active {
    background: var(--primary);
    color: white;
}

.nav-item i {
    width: 20px;
    text-align: center;
}

.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--gray-700);
}

.version {
    font-size: 12px;
    color: var(--gray-500);
}

.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
}

.top-header {
    height: var(--header-height);
    background: white;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    padding: 0 24px;
    gap: 16px;
    position: sticky;
    top: 0;
    z-index: 50;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 20px;
    cursor: pointer;
    color: var(--gray-600);
}

.header-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--gray-800);
}

.header-actions {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 16px;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--gray-500);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--success);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.page-content {
    padding: 24px;
}

.page {
    display: none;
}

.page.active {
    display: block;
}

/* ── Stats Grid ── */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
    transition: transform 0.2s, box-shadow 0.2s;
}

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

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.stat-card.primary .stat-icon { background: var(--primary-light); color: var(--primary); }
.stat-card.success .stat-icon { background: var(--success-light); color: var(--success); }
.stat-card.danger .stat-icon { background: var(--danger-light); color: var(--danger); }
.stat-card.info .stat-icon { background: var(--info-light); color: var(--info); }
.stat-card.warning .stat-icon { background: var(--warning-light); color: var(--warning); }
.stat-card.secondary .stat-icon { background: var(--gray-100); color: var(--gray-600); }

.stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--gray-900);
    line-height: 1;
}

.stat-label {
    font-size: 13px;
    color: var(--gray-500);
    margin-top: 4px;
}

/* ── Cards ── */
.card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
}

.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-header h3 {
    font-size: 16px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.card-header h3 i {
    color: var(--primary);
}

.card-body {
    padding: 20px;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

/* ── Buttons ── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

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

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

.btn-secondary {
    background: var(--gray-200);
    color: var(--gray-700);
}

.btn-secondary:hover {
    background: var(--gray-300);
}

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

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

.btn-sm {
    padding: 6px 10px;
    font-size: 12px;
}

/* ── Forms ── */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--gray-300);
    border-radius: 6px;
    font-size: 14px;
    font-family: inherit;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

/* ── Tables ── */
.table-container {
    overflow-x: auto;
    background: white;
    border-radius: var(--border-radius);
    border: 1px solid var(--gray-200);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th {
    background: var(--gray-50);
    padding: 12px 16px;
    text-align: left;
    font-size: 13px;
    font-weight: 600;
    color: var(--gray-600);
    border-bottom: 1px solid var(--gray-200);
    white-space: nowrap;
}

.data-table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--gray-100);
    font-size: 14px;
}

.data-table tbody tr:hover {
    background: var(--gray-50);
}

/* ── Badges ── */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.badge-success { background: var(--success-light); color: var(--success); }
.badge-danger { background: var(--danger-light); color: var(--danger); }
.badge-warning { background: var(--warning-light); color: var(--warning); }
.badge-info { background: var(--info-light); color: var(--info); }
.badge-primary { background: var(--primary-light); color: var(--primary); }
.badge-gray { background: var(--gray-100); color: var(--gray-600); }

/* ── Search & Filters ── */
.page-actions {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.search-box {
    position: relative;
    flex: 1;
    min-width: 200px;
}

.search-box i {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-400);
}

.search-box input {
    width: 100%;
    padding: 10px 12px 10px 36px;
    border: 1px solid var(--gray-300);
    border-radius: 6px;
    font-size: 14px;
}

.filter-group {
    display: flex;
    gap: 8px;
}

.filter-group select {
    padding: 10px 12px;
    border: 1px solid var(--gray-300);
    border-radius: 6px;
    font-size: 14px;
    background: white;
}

/* ── Pagination ── */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 20px;
}

.pagination button {
    padding: 8px 12px;
    border: 1px solid var(--gray-300);
    border-radius: 6px;
    background: white;
    cursor: pointer;
    font-size: 14px;
}

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

.pagination button:hover:not(.active) {
    background: var(--gray-100);
}

/* ── Activity List ── */
.activity-list {
    max-height: 400px;
    overflow-y: auto;
}

.activity-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--gray-100);
}

.activity-item:last-child {
    border-bottom: none;
}

.activity-icon {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    flex-shrink: 0;
}

.activity-info {
    flex: 1;
}

.activity-info .title {
    font-size: 14px;
    font-weight: 500;
}

.activity-info .meta {
    font-size: 12px;
    color: var(--gray-500);
}

.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--gray-400);
    font-size: 14px;
}

/* ── SOL Grid ── */
.sol-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 16px;
}

.sol-card {
    background: white;
    border-radius: var(--border-radius);
    border: 1px solid var(--gray-200);
    padding: 20px;
    transition: all 0.2s;
}

.sol-card:hover {
    box-shadow: var(--shadow-md);
}

.sol-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.sol-card-title {
    font-size: 16px;
    font-weight: 600;
}

.sol-card-count {
    font-size: 13px;
    color: var(--gray-500);
}

.sol-card-desc {
    font-size: 13px;
    color: var(--gray-500);
    margin-bottom: 12px;
}

/* ── Toggle Switch ── */
.toggle {
    position: relative;
    width: 44px;
    height: 24px;
}

.toggle input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gray-300);
    border-radius: 24px;
    transition: 0.3s;
}

.toggle-slider:before {
    content: "";
    position: absolute;
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background: white;
    border-radius: 50%;
    transition: 0.3s;
}

.toggle input:checked + .toggle-slider {
    background: var(--primary);
}

.toggle input:checked + .toggle-slider:before {
    transform: translateX(20px);
}

/* ── Export Cards ── */
.export-options {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.export-card {
    background: var(--gray-50);
    border: 2px solid var(--gray-200);
    border-radius: var(--border-radius);
    padding: 24px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
}

.export-card:hover {
    border-color: var(--primary);
    background: var(--primary-light);
}

.export-card i {
    font-size: 36px;
    color: var(--primary);
    margin-bottom: 12px;
}

.export-card h4 {
    font-size: 16px;
    margin-bottom: 4px;
}

.export-card p {
    font-size: 13px;
    color: var(--gray-500);
}

/* ── Modal ── */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 200;
    align-items: center;
    justify-content: center;
}

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

.modal {
    background: white;
    border-radius: 12px;
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
}

.modal-header {
    padding: 20px;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h3 {
    font-size: 18px;
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--gray-400);
}

.modal-body {
    padding: 20px;
}

/* ── Toast ── */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 300;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    background: var(--gray-900);
    color: white;
    padding: 12px 20px;
    border-radius: 8px;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
    animation: slideIn 0.3s ease;
    max-width: 400px;
}

.toast.success { border-left: 4px solid var(--success); }
.toast.error { border-left: 4px solid var(--danger); }
.toast.info { border-left: 4px solid var(--info); }

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* ── Loading ── */
.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--gray-300);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ── Responsive ── */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
    }

    .menu-toggle {
        display: block;
    }

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

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .export-options {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .page-actions {
        flex-direction: column;
        align-items: stretch;
    }
}