/* AI Conference Theme - Professional & Accessible */
:root {
    /* Color Variables */
    --primary-cyan: #00bcd4;
    --primary-cyan-light: #4dd0e1;
    --primary-cyan-dark: #00838f;
    --accent-blue: #2196f3;
    --background-dark: #0f0f0f;
    --background-gradient: linear-gradient(135deg, #0f0f0f 0%, #1a1a1a 100%);
    --surface-dark: rgba(255, 255, 255, 0.05);
    --surface-dark-hover: rgba(255, 255, 255, 0.08);
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-muted: #808080;
    --border-color: rgba(255, 255, 255, 0.1);
    --success-color: #4caf50;
    --warning-color: #ff9800;
    --info-color: #2196f3;
    --danger-color: #f44336;
}

body {
    background: var(--background-gradient);
    min-height: 100vh;
    color: var(--text-primary);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
}

/* Logo and Branding */
.navbar-brand {
    display: flex;
    align-items: center;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-primary) !important;
}

.navbar-brand img {
    height: 32px;
    margin-right: 12px;
}

/* Navigation Improvements */
.navbar {
    background: rgba(0, 0, 0, 0.8) !important;
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}

.nav-link {
    color: var(--text-secondary) !important;
    transition: color 0.2s ease;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-cyan) !important;
}

/* Card Components */
.card {
    background: var(--surface-dark);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(0, 188, 212, 0.1);
}

.stats-card {
    background: linear-gradient(135deg, #2d3748 0%, #4a5568 100%);
    border: none;
}

.metric-card {
    background: linear-gradient(135deg, #1a365d 0%, #2a4a6b 100%);
    border: none;
    transition: transform 0.2s ease;
}

.metric-card:hover {
    transform: translateY(-2px);
}

/* High Contrast Section Headers - FIX FOR THE CONTRAST ISSUE */
.section-header {
    color: var(--primary-cyan) !important;
    font-weight: 700;
    margin-bottom: 1.5rem;
    text-shadow: 0 0 10px rgba(0, 188, 212, 0.3);
    /* Removed the problematic gradient text fill */
}

.display-4.section-header {
    color: var(--text-primary) !important;
    text-shadow: 0 0 20px rgba(0, 188, 212, 0.4);
}

/* Accessible Badges and Progress Bars */
.percentage-badge {
    background: linear-gradient(45deg, var(--primary-cyan) 0%, var(--accent-blue) 100%);
    color: white !important;
    padding: 0.25rem 0.5rem;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 600;
    text-decoration: none !important;
    transition: transform 0.2s ease;
}

.percentage-badge:hover {
    transform: scale(1.05);
    color: white !important;
}

.progress {
    background: rgba(255, 255, 255, 0.1);
    height: 8px !important;
    border-radius: 4px;
}

.progress-bar {
    background: linear-gradient(90deg, var(--primary-cyan) 0%, var(--accent-blue) 100%);
    border-radius: 4px;
    transition: width 0.3s ease;
}

/* Table Improvements */
.table-dark {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 8px;
    overflow: hidden;
}

.table-dark th {
    background: rgba(0, 188, 212, 0.1);
    border-bottom: 2px solid var(--primary-cyan);
    color: var(--text-primary);
    font-weight: 600;
}

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

.table-hover tbody tr:hover {
    background: var(--surface-dark-hover);
}

/* Typography Improvements */
.lead {
    color: var(--text-secondary);
}

.text-muted {
    color: var(--text-muted) !important;
}

.text-primary {
    color: var(--primary-cyan) !important;
}

.text-success {
    color: var(--success-color) !important;
}

.text-warning {
    color: var(--warning-color) !important;
}

.text-info {
    color: var(--info-color) !important;
}

/* Chart Container */
.chart-container {
    position: relative;
    height: 300px;
    margin-bottom: 1rem;
}

/* Button Improvements */
.btn-primary {
    background: linear-gradient(45deg, var(--primary-cyan) 0%, var(--accent-blue) 100%);
    border: none;
    border-radius: 8px;
    font-weight: 500;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(0, 188, 212, 0.3);
}

/* Alert Improvements */
.alert {
    border-radius: 8px;
    border: none;
}

.alert-success {
    background: rgba(76, 175, 80, 0.1);
    color: var(--success-color);
    border-left: 4px solid var(--success-color);
}

.alert-warning {
    background: rgba(255, 152, 0, 0.1);
    color: var(--warning-color);
    border-left: 4px solid var(--warning-color);
}

.alert-danger {
    background: rgba(244, 67, 54, 0.1);
    color: var(--danger-color);
    border-left: 4px solid var(--danger-color);
}

.alert-info {
    background: rgba(33, 150, 243, 0.1);
    color: var(--info-color);
    border-left: 4px solid var(--info-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    .navbar-brand img {
        height: 28px;
        margin-right: 8px;
    }
    
    .navbar-brand {
        font-size: 1.1rem;
    }
    
    .display-4 {
        font-size: 2rem;
    }
}

/* Print Styles for PDF Export */
@media print {
    body {
        background: white !important;
        color: black !important;
    }
    
    .card {
        background: white !important;
        border: 1px solid #ddd !important;
        box-shadow: none !important;
    }
    
    .section-header {
        color: var(--primary-cyan-dark) !important;
        text-shadow: none !important;
    }
    
    .navbar {
        display: none !important;
    }
}