/* ============================================
   Visitor Analytics - CSS Variables & Base
   ============================================ */

:root {
    /* Primary Colors - SMG Brand */
    --color-primary: #FF6D41;
    --color-primary-hover: #e85a30;
    --color-primary-light: rgba(255, 109, 65, 0.1);
    
    /* Status Colors */
    --color-success: #3DD68C;
    --color-error: #F97066;
    --color-warning: #FFCC00;
    --color-info: #3B82F6;
    
    /* Dark Mode (Default) */
    --color-bg-dark: #223038;
    --color-bg-dark-end: #2A3B43;
    --color-sidebar-dark: #2C3941;
    --color-card-dark: #28343c;
    --color-border-dark: #3a4a53;
    --color-text-primary: #ffffff;
    --color-text-secondary: #9ca3af;
    --color-text-muted: #6b7280;
    
    /* Layout */
    --sidebar-width: 16rem;
    --header-height: 4rem;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 200ms ease;
    
    /* Chart Colors */
    --chart-1: #FF6D41;
    --chart-2: #3DD68C;
    --chart-3: #3B82F6;
    --chart-4: #8B5CF6;
    --chart-5: #FFCC00;
    --chart-6: #F97066;
}

/* ============================================
   Base Styles
   ============================================ */

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    min-height: 100vh;
    margin: 0;
    background: linear-gradient(135deg, var(--color-bg-dark), var(--color-bg-dark-end));
    color: var(--color-text-primary);
}

/* ============================================
   Layout
   ============================================ */

.app-layout {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    width: var(--sidebar-width);
    background-color: var(--color-sidebar-dark);
    display: flex;
    flex-direction: column;
    z-index: 40;
    border-right: 1px solid var(--color-border-dark);
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--color-border-dark);
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.sidebar-logo-icon {
    width: 2.5rem;
    height: 2.5rem;
    background: linear-gradient(135deg, var(--color-primary), #ff9966);
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.sidebar-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-text-primary);
}

.sidebar-subtitle {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
}

/* Navigation */
.sidebar-nav {
    flex: 1;
    padding: 1rem 0.75rem;
    overflow-y: auto;
}

.nav-section {
    margin-bottom: 1.5rem;
}

.nav-section-title {
    font-size: 0.625rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    padding: 0 0.75rem;
    margin-bottom: 0.5rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    border-radius: 0.5rem;
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--transition-fast);
    margin-bottom: 0.25rem;
}

.nav-link:hover {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--color-text-primary);
}

.nav-link.active {
    background-color: var(--color-primary-light);
    color: var(--color-primary);
}

.nav-link-icon {
    font-size: 1.25rem;
    opacity: 0.8;
}

.nav-link.active .nav-link-icon {
    opacity: 1;
}

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

/* Header */
.header-bar {
    position: sticky;
    top: 0;
    z-index: 30;
    height: var(--header-height);
    background-color: rgba(34, 48, 56, 0.9);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--color-border-dark);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
}

.header-title {
    font-size: 1.25rem;
    font-weight: 600;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.header-stat {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.header-stat-value {
    color: var(--color-text-primary);
    font-weight: 600;
}

/* Page Content */
.page-content {
    flex: 1;
    padding: 1.5rem;
}

/* ============================================
   Cards
   ============================================ */

.card {
    background-color: var(--color-card-dark);
    border-radius: 0.75rem;
    border: 1px solid var(--color-border-dark);
}

.card-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--color-border-dark);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-title {
    font-size: 1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card-body {
    padding: 1.25rem;
}

/* Stat Cards */
.stat-card {
    background-color: var(--color-card-dark);
    border-radius: 0.75rem;
    border: 1px solid var(--color-border-dark);
    padding: 1.25rem;
    transition: all var(--transition-fast);
}

.stat-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

.stat-card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 0.75rem;
}

.stat-card-icon {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.stat-card-icon.primary { background-color: var(--color-primary-light); color: var(--color-primary); }
.stat-card-icon.success { background-color: rgba(61, 214, 140, 0.1); color: var(--color-success); }
.stat-card-icon.info { background-color: rgba(59, 130, 246, 0.1); color: var(--color-info); }
.stat-card-icon.warning { background-color: rgba(255, 204, 0, 0.1); color: var(--color-warning); }

.stat-card-label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-card-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-text-primary);
    line-height: 1.2;
}

.stat-card-value span {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.stat-card-footer {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-top: 0.5rem;
}

.stat-card-change {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.75rem;
    font-weight: 500;
}

.stat-card-change.positive { color: var(--color-success); }
.stat-card-change.negative { color: var(--color-error); }

/* ============================================
   Buttons
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 0.5rem;
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

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

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

.btn-secondary {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border-dark);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.15);
}

.btn-icon {
    width: 2.25rem;
    height: 2.25rem;
    padding: 0;
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--color-text-secondary);
    border-radius: 0.5rem;
}

.btn-icon:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--color-text-primary);
}

/* ============================================
   Form Elements
   ============================================ */

.form-group {
    margin-bottom: 1rem;
}

.form-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: 0.375rem;
}

.form-input,
.form-select {
    width: 100%;
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
    color: var(--color-text-primary);
    background-color: var(--color-bg-dark);
    border: 1px solid var(--color-border-dark);
    border-radius: 0.5rem;
    transition: all var(--transition-fast);
}

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

/* ============================================
   Tables
   ============================================ */

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

.data-table thead {
    background-color: rgba(255, 255, 255, 0.02);
}

.data-table th {
    padding: 0.75rem 1rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
    text-align: left;
    border-bottom: 1px solid var(--color-border-dark);
}

.data-table td {
    padding: 0.875rem 1rem;
    font-size: 0.875rem;
    color: var(--color-text-primary);
    border-bottom: 1px solid var(--color-border-dark);
}

.data-table tbody tr:hover {
    background-color: rgba(255, 255, 255, 0.02);
}

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

/* ============================================
   Filters Bar
   ============================================ */

.filters-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    gap: 1rem;
    padding: 1rem 1.25rem;
    background-color: var(--color-card-dark);
    border-radius: 0.75rem;
    border: 1px solid var(--color-border-dark);
    margin-bottom: 1.5rem;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.filter-group label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-text-secondary);
}

/* ============================================
   Grid Layouts
   ============================================ */

.grid-cols-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
}

.grid-cols-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.grid-cols-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

@media (max-width: 1280px) {
    .grid-cols-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 1024px) {
    .grid-cols-2,
    .grid-cols-3 {
        grid-template-columns: 1fr;
    }
    
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
}

@media (max-width: 640px) {
    .grid-cols-4 {
        grid-template-columns: 1fr;
    }
    
    .filters-bar {
        flex-direction: column;
        align-items: stretch;
    }
}

/* ============================================
   Chart Containers
   ============================================ */

.chart-container {
    position: relative;
    height: 300px;
}

.chart-container-sm {
    height: 200px;
}

/* ============================================
   Badges
   ============================================ */

.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 9999px;
}

.badge-primary {
    background-color: var(--color-primary-light);
    color: var(--color-primary);
}

.badge-success {
    background-color: rgba(61, 214, 140, 0.1);
    color: var(--color-success);
}

.badge-warning {
    background-color: rgba(255, 204, 0, 0.1);
    color: var(--color-warning);
}

.badge-info {
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--color-info);
}

/* ============================================
   Heatmap
   ============================================ */

.heatmap-container {
    overflow-x: auto;
}

.heatmap-grid {
    display: grid;
    grid-template-columns: 60px repeat(24, 1fr);
    gap: 2px;
    font-size: 0.625rem;
    min-width: 600px;
}

.heatmap-cell {
    aspect-ratio: 1;
    border-radius: 3px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 500;
    font-size: 0.5rem;
    color: white;
    min-height: 20px;
}

.heatmap-label {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-right: 0.5rem;
    color: var(--color-text-secondary);
    font-size: 0.625rem;
    min-height: 20px;
}

.heatmap-header {
    text-align: center;
    color: var(--color-text-muted);
    padding-bottom: 0.25rem;
    font-size: 0.625rem;
}

/* Heatmap intensity colors */
.heat-0 { background-color: rgba(255, 255, 255, 0.05); color: transparent; }
.heat-1 { background-color: rgba(255, 109, 65, 0.2); }
.heat-2 { background-color: rgba(255, 109, 65, 0.4); }
.heat-3 { background-color: rgba(255, 109, 65, 0.6); }
.heat-4 { background-color: rgba(255, 109, 65, 0.8); }
.heat-5 { background-color: rgba(255, 109, 65, 1.0); }

/* ============================================
   Scrollbar
   ============================================ */

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background-color: var(--color-border-dark);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background-color: rgba(255, 255, 255, 0.3);
}

/* ============================================
   Loading States
   ============================================ */

.skeleton {
    background: linear-gradient(90deg, 
        var(--color-border-dark) 0%, 
        rgba(255, 255, 255, 0.1) 50%, 
        var(--color-border-dark) 100%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: 0.25rem;
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ============================================
   Empty State
   ============================================ */

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem;
    text-align: center;
    color: var(--color-text-muted);
}

.empty-state-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

/* ============================================
   Trend Comparison
   ============================================ */

.trend-comparison {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.trend-item {
    padding: 1rem;
    background-color: rgba(255, 255, 255, 0.02);
    border-radius: 0.5rem;
}

.trend-label {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    margin-bottom: 0.25rem;
}

.trend-value {
    font-size: 1.5rem;
    font-weight: 700;
}

.trend-change {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.75rem;
    font-weight: 500;
    margin-top: 0.25rem;
}

.trend-change.positive { color: var(--color-success); }
.trend-change.negative { color: var(--color-error); }

/* ============================================
   Utilities
   ============================================ */

.text-primary { color: var(--color-primary); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-error { color: var(--color-error); }
.text-info { color: var(--color-info); }
.text-muted { color: var(--color-text-muted); }

.bg-primary { background-color: var(--color-primary); }
.bg-success { background-color: var(--color-success); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }

.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.gap-3 { gap: 1.5rem; }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.flex-1 { flex: 1; }

.overflow-auto { overflow: auto; }
.overflow-hidden { overflow: hidden; }

.w-full { width: 100%; }
.h-full { height: 100%; }

/* Mobile menu button */
.mobile-menu-btn {
    display: none;
}

@media (max-width: 1024px) {
    .mobile-menu-btn {
        display: flex;
    }
}

/* Sidebar Overlay */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 35;
}

@media (max-width: 1024px) {
    .sidebar-overlay.open {
        display: block;
    }
}

/* Export Dropdown */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 0.5rem;
    background-color: var(--color-card-dark);
    border: 1px solid var(--color-border-dark);
    border-radius: 0.5rem;
    min-width: 150px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
    display: none;
    z-index: 50;
}

.dropdown-menu.open {
    display: block;
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1rem;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.dropdown-item:hover {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--color-text-primary);
}

.dropdown-item:first-child {
    border-radius: 0.5rem 0.5rem 0 0;
}

.dropdown-item:last-child {
    border-radius: 0 0 0.5rem 0.5rem;
}