/* Theme Variables */
:root {
    /* Light Theme Colors */
    --primary-color: #1a73e8;
    --primary-light: #4285f4;
    --primary-dark: #0d47a1;
    --secondary-color: #34a853;
    --secondary-light: #4caf50;
    --secondary-dark: #1b5e20;
    --warning-color: #fbbc04;
    --warning-dark: #f57c00;
    --danger-color: #ea4335;
    --danger-dark: #c62828;
    --background-color: #f8f9fa;
    --card-bg: #ffffff;
    --text-color: #202124;
    --text-secondary: #5f6368;
    --border-color: #dadce0;
    
    /* Common Variables */
    --border-radius: 12px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
    --transition: all 0.3s ease;
}

/* Dark Theme Variables */
.dark-theme {
    --primary-color: #4285f4;
    --primary-light: #5c9fff;
    --primary-dark: #2962ff;
    --secondary-color: #4caf50;
    --secondary-light: #66bb6a;
    --secondary-dark: #388e3c;
    --warning-color: #ffd600;
    --warning-dark: #ffab00;
    --danger-color: #f44336;
    --danger-dark: #d32f2f;
    --background-color: #202124;
    --card-bg: #2c2c2c;
    --text-color: #e8eaed;
    --text-secondary: #9aa0a6;
    --border-color: #3c4043;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    display: flex;
    min-height: 100vh;
    transition: background-color var(--transition);
}

/* Sidebar Styles */
.sidebar {
    width: 260px;
    background: var(--card-bg);
    height: 100vh;
    position: fixed;
    box-shadow: var(--shadow-md);
    z-index: 1000;
    transition: var(--transition);
    overflow-y: auto;
}

.sidebar-collapsed {
    width: 70px;
}

.logo-container {
    padding: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    color: var(--primary-color);
    font-weight: 700;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    white-space: nowrap;
}

.logo-icon {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.toggle-sidebar {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.2rem;
    padding: 0.25rem;
    border-radius: 4px;
    transition: var(--transition);
}

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

/* Navigation Menu */
.nav-menu {
    list-style: none;
    padding: 1rem 0;
}

.nav-item {
    padding: 0.25rem 1rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--text-color);
    text-decoration: none;
    border-radius: 8px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.nav-link:hover {
    background: rgba(66, 133, 244, 0.1);
    color: var(--primary-color);
}

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

.nav-link.active:hover {
    background: var(--primary-dark);
}

.nav-icon {
    font-size: 1.2rem;
    min-width: 24px;
    display: flex;
    justify-content: center;
}

.nav-text {
    white-space: nowrap;
    transition: var(--transition);
}

/* Main Content */
.main-content {
    margin-left: 260px;
    padding: 2rem;
    width: calc(100% - 260px);
    transition: var(--transition);
}

.main-content-expanded {
    margin-left: 70px;
    width: calc(100% - 70px);
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(var(--background-color), 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    backdrop-filter: blur(3px);
}

.spinner-container {
    text-align: center;
    background: var(--card-bg);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
}

/* Upload Container */
.upload-container {
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius);
    padding: 2rem;
    text-align: center;
    transition: var(--transition);
}

.upload-container.drag-active {
    border-color: var(--primary-color);
    background-color: rgba(var(--primary-color-rgb), 0.05);
}

/* DataTables Customization */
.dataTables_wrapper .dataTables_filter input {
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.5rem;
    background-color: var(--card-bg);
    color: var(--text-color);
}

.dataTables_wrapper .dataTables_length select {
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.3rem;
    background-color: var(--card-bg);
    color: var(--text-color);
}

/* Performance Badges */
.badge {
    padding: 0.35em 0.65em;
    font-size: 0.85em;
    font-weight: 600;
    border-radius: 4px;
}

.bg-success {
    background-color: var(--secondary-color) !important;
}

.bg-warning {
    background-color: var(--warning-color) !important;
    color: #000 !important;
}

.bg-danger {
    background-color: var(--danger-color) !important;
}

/* Charts */
.chart-container {
    position: relative;
    margin: auto;
    height: 300px;
}

/* Responsive Design */
@media (max-width: 992px) {
    .sidebar {
        width: 70px;
    }
    
    .sidebar .nav-text,
    .sidebar .logo-text {
        display: none;
    }
    
    .main-content {
        margin-left: 70px;
        width: calc(100% - 70px);
    }
    
    .sidebar.sidebar-expanded {
        width: 260px;
        z-index: 1050;
    }
    
    .sidebar.sidebar-expanded .nav-text,
    .sidebar.sidebar-expanded .logo-text {
        display: block;
    }
}

@media (max-width: 768px) {
    .main-content {
        padding: 1rem;
    }
    
    .chart-container {
        height: 250px;
    }
    
    .stats-summary {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .stats-summary {
        grid-template-columns: 1fr;
    }
}