/* ============================================================
   GDC – Design System
   Premium dark sidebar + light content UI
   ============================================================ */

/* --- Google Font --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ============================================================
   CSS Custom Properties (Design Tokens)
   ============================================================ */
:root {
    /* Primary */
    --primary-50: #eef2ff;
    --primary-100: #e0e7ff;
    --primary-200: #c7d2fe;
    --primary-300: #a5b4fc;
    --primary-400: #818cf8;
    --primary-500: #6366f1;
    --primary-600: #4f46e5;
    --primary-700: #4338ca;
    --primary-800: #3730a3;
    --primary-900: #312e81;

    /* Accent (Purple) */
    --accent-400: #a78bfa;
    --accent-500: #8b5cf6;
    --accent-600: #7c3aed;

    /* Success */
    --success-50: #ecfdf5;
    --success-100: #d1fae5;
    --success-500: #10b981;
    --success-600: #059669;
    --success-700: #047857;

    /* Warning */
    --warning-50: #fffbeb;
    --warning-100: #fef3c7;
    --warning-500: #f59e0b;
    --warning-600: #d97706;

    /* Danger */
    --danger-50: #fef2f2;
    --danger-100: #fee2e2;
    --danger-500: #ef4444;
    --danger-600: #dc2626;

    /* Info */
    --info-50: #eff6ff;
    --info-100: #dbeafe;
    --info-500: #3b82f6;
    --info-600: #2563eb;

    /* Neutrals */
    --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 */
    --sidebar-bg: #0f1117;
    --sidebar-hover: rgba(99, 102, 241, 0.1);
    --sidebar-active: rgba(99, 102, 241, 0.15);
    --sidebar-text: #94a3b8;
    --sidebar-text-active: #ffffff;
    --sidebar-width: 260px;
    --sidebar-collapsed-width: 72px;

    /* Content */
    --content-bg: #f8f9fc;
    --card-bg: #ffffff;
    --card-shadow: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.06);
    --card-shadow-hover: 0 10px 25px rgba(0, 0, 0, 0.08);
    --card-radius: 12px;

    /* Topbar */
    --topbar-height: 64px;
    --topbar-bg: #ffffff;
    --topbar-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.8125rem;
    --font-size-base: 0.875rem;
    --font-size-md: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;

    /* Gradient */
    --gradient-primary: linear-gradient(135deg, var(--primary-500) 0%, var(--accent-500) 100%);
    --gradient-dark: linear-gradient(135deg, #1a1d2e 0%, #0f1117 100%);
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    color: var(--gray-800);
    background-color: var(--content-bg);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    color: var(--primary-600);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-700);
}

img {
    max-width: 100%;
    height: auto;
}

/* ============================================================
   Layout: Sidebar + Content
   ============================================================ */
.app-layout {
    display: flex;
    min-height: 100vh;
}

/* --- Sidebar --- */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background: var(--gradient-dark);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    transition: width var(--transition-slow);
    overflow: hidden;
}

.sidebar-header {
    display: flex;
    align-items: center;
    padding: var(--spacing-lg);
    gap: var(--spacing-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    min-height: var(--topbar-height);
}

.sidebar-logo {
    width: 36px;
    height: 36px;
    background: var(--gradient-primary);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: var(--font-size-lg);
    color: white;
    flex-shrink: 0;
}

.sidebar-brand {
    color: white;
    font-size: var(--font-size-md);
    font-weight: 700;
    white-space: nowrap;
}

.sidebar-brand small {
    font-size: var(--font-size-xs);
    font-weight: 400;
    color: var(--sidebar-text);
    display: block;
    margin-top: 2px;
}

.sidebar-nav {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-sm);
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: rgba(255,255,255,0.1) transparent;
}

.sidebar-section {
    margin-bottom: var(--spacing-lg);
}

.sidebar-section-title {
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--gray-500);
    padding: var(--spacing-sm) var(--spacing-md);
    margin-bottom: var(--spacing-xs);
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: 10px var(--spacing-md);
    border-radius: 8px;
    color: var(--sidebar-text);
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: all var(--transition-fast);
    margin-bottom: 2px;
    position: relative;
}

.sidebar-link:hover {
    color: var(--sidebar-text-active);
    background: var(--sidebar-hover);
}

.sidebar-link.active {
    color: var(--sidebar-text-active);
    background: var(--sidebar-active);
}

.sidebar-link.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 20px;
    background: var(--gradient-primary);
    border-radius: 0 2px 2px 0;
}

.sidebar-link svg,
.sidebar-link .icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    opacity: 0.7;
}

.sidebar-link.active svg,
.sidebar-link.active .icon {
    opacity: 1;
}

.sidebar-badge {
    margin-left: auto;
    background: var(--primary-500);
    color: white;
    font-size: 11px;
    font-weight: 600;
    padding: 2px 7px;
    border-radius: 10px;
    min-width: 20px;
    text-align: center;
}

.sidebar-footer {
    padding: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.sidebar-user {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm);
    border-radius: 8px;
    transition: background var(--transition-fast);
}

.sidebar-user:hover {
    background: var(--sidebar-hover);
}

.sidebar-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: var(--font-size-sm);
    flex-shrink: 0;
}

.sidebar-user-info {
    flex: 1;
    min-width: 0;
}

.sidebar-user-name {
    color: white;
    font-size: var(--font-size-sm);
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-user-role {
    color: var(--gray-500);
    font-size: var(--font-size-xs);
    text-transform: capitalize;
}

/* --- Main Content Area --- */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: margin-left var(--transition-slow);
}

/* --- Topbar --- */
.topbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--topbar-bg);
    height: var(--topbar-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-xl);
    box-shadow: var(--topbar-shadow);
    border-bottom: 1px solid var(--gray-100);
}

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

.topbar-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--gray-900);
}

.topbar-breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--gray-500);
}

.topbar-breadcrumb a {
    color: var(--gray-500);
}

.topbar-breadcrumb a:hover {
    color: var(--primary-600);
}

.topbar-breadcrumb .separator {
    color: var(--gray-300);
}

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

.topbar-search {
    position: relative;
}

.topbar-search input {
    width: 280px;
    padding: 8px 16px 8px 40px;
    border: 1px solid var(--gray-200);
    border-radius: 8px;
    font-size: var(--font-size-sm);
    background: var(--gray-50);
    transition: all var(--transition-fast);
    font-family: var(--font-family);
}

.topbar-search input:focus {
    outline: none;
    border-color: var(--primary-300);
    box-shadow: 0 0 0 3px var(--primary-50);
    background: white;
    width: 320px;
}

.topbar-search svg {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    color: var(--gray-400);
}

/* Notification Bell */
.notification-bell {
    position: relative;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    cursor: pointer;
    transition: background var(--transition-fast);
    border: none;
    background: none;
    color: var(--gray-600);
}

.notification-bell:hover {
    background: var(--gray-100);
}

.notification-bell svg {
    width: 22px;
    height: 22px;
}

.notification-count {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 18px;
    height: 18px;
    background: var(--danger-500);
    color: white;
    font-size: 10px;
    font-weight: 700;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid white;
}

/* --- Page Content --- */
.page-content {
    flex: 1;
    padding: var(--spacing-xl);
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-xl);
}

.page-header h1 {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    color: var(--gray-900);
}

.page-header p {
    color: var(--gray-500);
    margin-top: 4px;
    font-size: var(--font-size-sm);
}

/* ============================================================
   Components
   ============================================================ */

/* --- Cards --- */
.card {
    background: var(--card-bg);
    border-radius: var(--card-radius);
    box-shadow: var(--card-shadow);
    border: 1px solid var(--gray-100);
    transition: box-shadow var(--transition-base), transform var(--transition-base);
}

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

.card-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-header h3 {
    font-size: var(--font-size-md);
    font-weight: 700;
    color: var(--gray-900);
}

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

.card-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--gray-100);
    background: var(--gray-50);
    border-radius: 0 0 var(--card-radius) var(--card-radius);
}

/* --- KPI Cards --- */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.kpi-card {
    background: var(--card-bg);
    border-radius: var(--card-radius);
    padding: var(--spacing-lg);
    box-shadow: var(--card-shadow);
    border: 1px solid var(--gray-100);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

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

.kpi-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
}

.kpi-card.primary::after { background: var(--gradient-primary); }
.kpi-card.success::after { background: var(--success-500); }
.kpi-card.warning::after { background: var(--warning-500); }
.kpi-card.info::after { background: var(--info-500); }
.kpi-card.danger::after { background: var(--danger-500); }

.kpi-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.kpi-icon.primary { background: var(--primary-50); color: var(--primary-600); }
.kpi-icon.success { background: var(--success-50); color: var(--success-600); }
.kpi-icon.warning { background: var(--warning-50); color: var(--warning-600); }
.kpi-icon.info { background: var(--info-50); color: var(--info-600); }
.kpi-icon.danger { background: var(--danger-50); color: var(--danger-600); }

.kpi-icon svg {
    width: 24px;
    height: 24px;
}

.kpi-content {
    flex: 1;
}

.kpi-label {
    font-size: var(--font-size-sm);
    color: var(--gray-500);
    font-weight: 500;
    margin-bottom: 4px;
}

.kpi-value {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    color: var(--gray-900);
    line-height: 1.2;
}

.kpi-change {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: var(--font-size-xs);
    font-weight: 600;
    margin-top: 4px;
    padding: 2px 8px;
    border-radius: 20px;
}

.kpi-change.up { background: var(--success-50); color: var(--success-700); }
.kpi-change.down { background: var(--danger-50); color: var(--danger-600); }

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    line-height: 1.4;
    white-space: nowrap;
}

.btn svg { width: 18px; height: 18px; }

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.4);
    color: white;
}

.btn-secondary {
    background: white;
    color: var(--gray-700);
    border: 1px solid var(--gray-200);
}

.btn-secondary:hover {
    background: var(--gray-50);
    border-color: var(--gray-300);
    color: var(--gray-800);
}

.btn-success {
    background: var(--success-500);
    color: white;
}

.btn-success:hover {
    background: var(--success-600);
    color: white;
}

.btn-danger {
    background: var(--danger-500);
    color: white;
}

.btn-danger:hover {
    background: var(--danger-600);
    color: white;
}

.btn-warning {
    background: var(--warning-500);
    color: white;
}

.btn-sm {
    padding: 6px 14px;
    font-size: var(--font-size-xs);
}

.btn-lg {
    padding: 14px 28px;
    font-size: var(--font-size-md);
}

.btn-icon {
    width: 36px;
    height: 36px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
}

/* --- Tables --- */
.table-wrapper {
    overflow-x: auto;
    border-radius: var(--card-radius);
    border: 1px solid var(--gray-100);
}

.data-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

.data-table thead th {
    padding: 12px 16px;
    text-align: left;
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--gray-500);
    background: var(--gray-50);
    border-bottom: 1px solid var(--gray-200);
    white-space: nowrap;
}

.data-table tbody td {
    padding: 14px 16px;
    font-size: var(--font-size-sm);
    color: var(--gray-700);
    border-bottom: 1px solid var(--gray-50);
    vertical-align: middle;
}

.data-table tbody tr {
    transition: background var(--transition-fast);
}

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

.data-table tbody tr:last-child td {
    border-bottom: none;
}

/* --- Status Badges --- */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.badge-lead { background: var(--warning-100); color: var(--warning-600); }
.badge-active { background: var(--success-100); color: var(--success-700); }
.badge-inactive { background: var(--gray-100); color: var(--gray-600); }
.badge-pending { background: var(--warning-100); color: var(--warning-600); }
.badge-shipped { background: var(--info-100); color: var(--info-600); }
.badge-delivered { background: var(--success-100); color: var(--success-700); }
.badge-returned { background: var(--danger-100); color: var(--danger-600); }
.badge-approved { background: var(--primary-100); color: var(--primary-700); }
.badge-paid { background: var(--success-100); color: var(--success-700); }
.badge-suspended { background: var(--danger-100); color: var(--danger-600); }

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

.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 6px;
}

.form-label .required {
    color: var(--danger-500);
    margin-left: 2px;
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--gray-200);
    border-radius: 8px;
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    color: var(--gray-800);
    background: white;
    transition: all var(--transition-fast);
    line-height: 1.5;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-400);
    box-shadow: 0 0 0 3px var(--primary-50);
}

.form-control.error {
    border-color: var(--danger-500);
    box-shadow: 0 0 0 3px var(--danger-50);
}

.form-control::placeholder {
    color: var(--gray-400);
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%236b7280' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

textarea.form-control {
    min-height: 100px;
    resize: vertical;
}

.form-error {
    font-size: var(--font-size-xs);
    color: var(--danger-500);
    margin-top: 4px;
}

.form-hint {
    font-size: var(--font-size-xs);
    color: var(--gray-400);
    margin-top: 4px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

/* --- Alerts --- */
.alert {
    padding: 14px 18px;
    border-radius: 10px;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    font-size: var(--font-size-sm);
    animation: slideDown 0.3s ease;
}

.alert svg { width: 20px; height: 20px; flex-shrink: 0; margin-top: 1px; }

.alert-success { background: var(--success-50); border: 1px solid var(--success-100); color: var(--success-700); }
.alert-error   { background: var(--danger-50); border: 1px solid var(--danger-100); color: var(--danger-600); }
.alert-warning { background: var(--warning-50); border: 1px solid var(--warning-100); color: var(--warning-600); }
.alert-info    { background: var(--info-50); border: 1px solid var(--info-100); color: var(--info-600); }

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* --- Pagination --- */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    margin-top: var(--spacing-xl);
}

.pagination a, .pagination span {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 8px;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--gray-600);
    transition: all var(--transition-fast);
}

.pagination a:hover {
    background: var(--primary-50);
    color: var(--primary-600);
}

.pagination .active {
    background: var(--gradient-primary);
    color: white;
    font-weight: 600;
}

.pagination .disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* --- Filters --- */
.filters-bar {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

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

.filter-group select,
.filter-group input {
    padding: 8px 12px;
    border: 1px solid var(--gray-200);
    border-radius: 8px;
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    background: white;
}

.filter-group select:focus,
.filter-group input:focus {
    outline: none;
    border-color: var(--primary-300);
}

/* --- Empty State --- */
.empty-state {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--gray-400);
}

.empty-state svg {
    width: 64px;
    height: 64px;
    margin-bottom: var(--spacing-md);
    opacity: 0.5;
}

.empty-state h3 {
    font-size: var(--font-size-lg);
    color: var(--gray-600);
    margin-bottom: var(--spacing-sm);
}

.empty-state p {
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-lg);
}

/* --- Charts container --- */
.chart-container {
    position: relative;
    height: 300px;
    width: 100%;
}

/* --- Grid utilities --- */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--spacing-lg); }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: var(--spacing-lg); }

/* --- Text utilities --- */
.text-muted { color: var(--gray-500); }
.text-primary { color: var(--primary-600); }
.text-success { color: var(--success-600); }
.text-danger { color: var(--danger-500); }
.text-right { text-align: right; }
.text-center { text-align: center; }
.font-bold { font-weight: 700; }
.font-mono { font-family: 'JetBrains Mono', monospace; }

/* --- Spacing utilities --- */
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

/* --- Flex utilities --- */
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }

/* --- Notification dropdown --- */
.notification-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    width: 380px;
    background: white;
    border-radius: var(--card-radius);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
    border: 1px solid var(--gray-100);
    z-index: 1100;
    display: none;
    animation: fadeIn 0.2s ease;
}

.notification-dropdown.show { display: block; }

.notification-dropdown-header {
    padding: 14px 18px;
    border-bottom: 1px solid var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-weight: 600;
    font-size: var(--font-size-sm);
}

.notification-list {
    max-height: 360px;
    overflow-y: auto;
}

.notification-item {
    display: flex;
    gap: var(--spacing-md);
    padding: 14px 18px;
    border-bottom: 1px solid var(--gray-50);
    transition: background var(--transition-fast);
    cursor: pointer;
}

.notification-item:hover { background: var(--gray-50); }
.notification-item.unread { background: var(--primary-50); }

.notification-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-top: 6px;
    flex-shrink: 0;
}

.notification-dot.info { background: var(--info-500); }
.notification-dot.success { background: var(--success-500); }
.notification-dot.warning { background: var(--warning-500); }
.notification-dot.error { background: var(--danger-500); }

.notification-text { flex: 1; }
.notification-title { font-size: var(--font-size-sm); font-weight: 600; color: var(--gray-800); }
.notification-message { font-size: var(--font-size-xs); color: var(--gray-500); margin-top: 2px; }
.notification-time { font-size: 11px; color: var(--gray-400); margin-top: 4px; }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-5px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* --- Mobile Toggle --- */
.sidebar-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border: none;
    background: none;
    cursor: pointer;
    color: var(--gray-600);
    border-radius: 8px;
}

.sidebar-toggle:hover {
    background: var(--gray-100);
}

/* --- Mobile overlay --- */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
}

/* ============================================================
   Auth Pages
   ============================================================ */
.auth-layout {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #0f172a 100%);
    position: relative;
    overflow: hidden;
}

.auth-layout::before {
    content: '';
    position: absolute;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, transparent 70%);
    top: -150px;
    right: -150px;
    animation: floatOrb 8s ease-in-out infinite;
}

.auth-layout::after {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.12) 0%, transparent 70%);
    bottom: -100px;
    left: -100px;
    animation: floatOrb 10s ease-in-out infinite reverse;
}

@keyframes floatOrb {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(30px, -20px) scale(1.05); }
}

.auth-card {
    width: 100%;
    max-width: 440px;
    background: white;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08);
    padding: 40px;
    position: relative;
    z-index: 1;
}

.auth-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    justify-content: center;
}

.auth-logo .logo-icon {
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 800;
    font-size: var(--font-size-xl);
}

.auth-logo h1 {
    font-size: var(--font-size-xl);
    font-weight: 800;
    color: var(--gray-900);
}

.auth-logo h1 small {
    display: block;
    font-size: var(--font-size-xs);
    font-weight: 400;
    color: var(--gray-400);
    margin-top: 2px;
}

.auth-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 4px;
    text-align: center;
}

.auth-subtitle {
    font-size: var(--font-size-sm);
    color: var(--gray-500);
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1024px) {
    .grid-3 { grid-template-columns: 1fr 1fr; }
    .form-row { grid-template-columns: 1fr; }
}

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

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

    .sidebar-overlay.show {
        display: block;
    }

    .sidebar-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }

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

    .page-content {
        padding: var(--spacing-md);
    }

    .topbar {
        padding: 0 var(--spacing-md);
    }

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

    .grid-2, .grid-3 {
        grid-template-columns: 1fr;
    }

    .topbar-search { display: none; }

    .notification-dropdown {
        width: calc(100vw - 32px);
        right: -8px;
    }
}

/* ============================================================
   Client Details Modal — Clean Modern Design
   ============================================================ */

.swal2-glass-popup {
    background: #fff !important;
    border: none !important;
    border-radius: 16px !important;
    box-shadow: 0 24px 48px -12px rgba(0, 0, 0, 0.15) !important;
    padding: 0 !important;
    overflow: hidden;
}

.swal2-glass-popup .swal2-title {
    background: transparent;
    color: var(--gray-900) !important;
    font-size: 1.1rem !important;
    font-weight: 700 !important;
    padding: 24px 28px 0 !important;
    margin: 0 !important;
    text-align: left !important;
}

.swal2-glass-popup .swal2-close {
    color: var(--gray-400) !important;
    top: 16px !important;
    right: 16px !important;
    font-size: 20px !important;
    width: 32px !important;
    height: 32px !important;
    border-radius: 8px !important;
    transition: all 0.15s ease;
}

.swal2-glass-popup .swal2-close:hover {
    color: var(--gray-700) !important;
    background: var(--gray-100) !important;
}

.swal2-glass-popup .swal2-html-container {
    padding: 0 !important;
    margin: 0 !important;
    overflow-y: auto;
    max-height: 68vh;
}

/* --- Content --- */
.modal-detail-content {
    text-align: left;
    padding: 20px 28px 28px;
}

/* --- Section Label --- */
.modal-section-label {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--gray-400);
    padding: 0 0 8px;
    margin-top: 24px;
    margin-bottom: 4px;
    border-bottom: 1px solid var(--gray-100);
}

.modal-section-label:first-child {
    margin-top: 0;
}

/* --- Field Row --- */
.modal-field-row {
    display: flex;
    align-items: center;
    padding: 10px 8px;
    border-radius: 8px;
    transition: background 0.12s ease;
}

.modal-field-row:hover {
    background: var(--gray-50);
}

.modal-field-label {
    width: 120px;
    flex-shrink: 0;
    font-size: 13px;
    color: var(--gray-400);
    font-weight: 500;
}

.modal-field-value {
    flex: 1;
    font-size: 13px;
    font-weight: 600;
    color: var(--gray-800);
    word-break: break-word;
}

.modal-field-copy {
    margin-left: 8px;
    flex-shrink: 0;
}

/* --- Copy Button --- */
.copy-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: transparent;
    border: 1px solid var(--gray-200);
    border-radius: 6px;
    color: var(--gray-400);
    cursor: pointer;
    transition: all 0.15s ease;
    padding: 0;
}

.copy-btn:hover {
    background: var(--gray-100);
    color: var(--gray-600);
    border-color: var(--gray-300);
}

.copy-btn:active {
    transform: scale(0.92);
}

.copy-btn.copied {
    background: var(--success-50);
    border-color: var(--success-500);
    color: var(--success-600);
}

.copy-btn svg {
    width: 13px;
    height: 13px;
}

/* --- File Link --- */
.modal-file-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 12px;
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: 6px;
    color: var(--primary-600);
    font-size: 12px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.15s ease;
}

.modal-file-link:hover {
    background: var(--primary-50);
    border-color: var(--primary-200);
    color: var(--primary-700);
}

/* --- Textarea Value --- */
.modal-textarea-value {
    font-weight: 500;
    white-space: pre-wrap;
    background: var(--gray-50);
    padding: 10px 12px;
    border-radius: 6px;
    font-size: 13px;
    color: var(--gray-700);
    line-height: 1.5;
    flex: 1;
}

/* --- Empty State --- */
.modal-empty-state {
    text-align: center;
    padding: 16px;
    color: var(--gray-400);
    font-size: 13px;
}