/* ExamPro Enhanced Styles - MVC Implementation
 * 
 * SUMMARY: This is the main stylesheet that maintains the exact original design
 * while adding improvements for mobile responsiveness and fixing navigation issues.
 * It includes enhanced mobile menu functionality with proper open/close behavior.
 * 
 * KEY FEATURES:
 * - Maintains exact original visual design and branding
 * - Fixed mobile hamburger menu with working X close button
 * - Improved responsive breakpoints and mobile-first approach
 * - Enhanced accessibility with proper focus states and ARIA support
 * - Optimized animations and transitions for better performance
 * 
 * UNIQUE TECHNIQUES:
 * - Uses CSS Grid and Flexbox for modern layouts while preserving design
 * - Implements mobile menu with proper slide animations and backdrop
 * - Includes toast notification and modal systems
 * - Provides comprehensive utility classes for consistent spacing
 * - Supports dynamic organization branding through CSS custom properties
 * 
 * FILE: /public/assets/css/style.css
 */

/* =============================================================================
   CSS VARIABLES AND BASE CONFIGURATION
   ============================================================================= */
:root {
    /* Color System */
    --primary-color: #1a1a2e;
    --secondary-color: #ff6b35;
    --accent-color: #0066cc;
    --white-color: #ffffff;
    --light-bg: #f8f9fa;
    --dark-text: #2c3e50;
    --light-text: #6c757d;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --info-color: #17a2b8;
    --border-color: #e9ecef;
    
    /* Shadows */
    --shadow-light: 0 2px 10px rgba(0, 0, 0, 0.08);
    --shadow-medium: 0 5px 25px rgba(0, 0, 0, 0.12);
    --shadow-heavy: 0 15px 50px rgba(0, 0, 0, 0.15);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #16213e 0%, #01015C 100%);
    --gradient-secondary: linear-gradient(135deg, #f7931e 0%, #ffa200 100%);
    
    /* Transitions and Animations */
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s ease-out;
    
    /* Border Radius */
    --border-radius: 12px;
    --border-radius-lg: 20px;
    --border-radius-sm: 6px;
    
    /* Spacing System */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;
    
    /* Z-Index Scale */
    --z-dropdown: 1000;
    --z-header: 1050;
    --z-modal-backdrop: 1060;
    --z-modal: 1070;
    --z-toast: 1080;
}

/* =============================================================================
   RESET AND BASE STYLES
   ============================================================================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', 'Segoe UI', 'Roboto', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 16px;
    line-height: 1.7;
    color: var(--dark-text);
    background-color: var(--white-color);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    padding-top: 70px; /* Account for fixed header */
}

/* Container System */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* =============================================================================
   TYPOGRAPHY SYSTEM
   ============================================================================= */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Inter', sans-serif;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-color);
    letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.5rem, 5vw, 3.5rem); font-weight: 800; }
h2 { font-size: clamp(2rem, 4vw, 2.8rem); font-weight: 700; }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 600; }
h4 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); font-weight: 600; }

p {
    margin-bottom: var(--spacing-sm);
    font-size: 1.1rem;
    line-height: 1.8;
}

/* =============================================================================
   HEADER STYLES - FIXED TOP NAVIGATION
   ============================================================================= */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--white-color);
    color: var(--primary-color);
    z-index: var(--z-header);
    box-shadow: var(--shadow-medium);
    height: 70px;
    border-bottom: 1px solid var(--border-color);
}

.main-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
    padding: 0 var(--spacing-md);
}

/* Skip Link for Accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--secondary-color);
    color: var(--white-color);
    padding: 8px 12px;
    text-decoration: none;
    z-index: calc(var(--z-header) + 1);
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

.skip-link:focus {
    top: 6px;
}

/* =============================================================================
   NAVIGATION BRAND
   ============================================================================= */
.nav-brand {
    display: flex;
    align-items: center;
}

.brand-link {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--primary-color);
    transition: var(--transition-smooth);
}

.brand-link:hover {
    transform: translateY(-1px);
}

.brand-logo {
    height: 40px;
    margin-right: var(--spacing-xs);
}

.brand-text {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--primary-color);
}

.brand-text-pro {
    color: var(--secondary-color);
}

/* =============================================================================
   DESKTOP NAVIGATION MENU
   ============================================================================= */
.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    list-style: none;
}

.nav-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    font-size: 1rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    transition: var(--transition-smooth);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    background: rgba(26, 26, 46, 0.05);
    color: var(--secondary-color);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -3px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 3px;
    background: var(--secondary-color);
    border-radius: 2px;
}

/* =============================================================================
   NAVIGATION ACTIONS (RIGHT SIDE)
   ============================================================================= */
.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* =============================================================================
   BUTTON SYSTEM
   ============================================================================= */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: 14px 28px;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
    white-space: nowrap;
    text-transform: none;
    letter-spacing: 0.01em;
    line-height: 1;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white-color);
    box-shadow: var(--shadow-light);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
    color: var(--white-color);
}

.btn-outline-primary {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-outline-primary:hover {
    background: var(--primary-color);
    color: var(--white-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow-light);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-color);
    color: var(--white-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.btn-lg {
    padding: 18px 36px;
    font-size: 1.1rem;
    border-radius: var(--border-radius-lg);
}

.btn-block {
    width: 100%;
    justify-content: center;
}

/* =============================================================================
   MOBILE NAVIGATION SYSTEM (ENHANCED)
   ============================================================================= */
.mobile-nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--primary-color);
    font-size: 1.2rem;
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--border-radius-sm);
    transition: var(--transition-smooth);
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
}

.mobile-nav-toggle:hover {
    background: rgba(26, 26, 46, 0.05);
}

.mobile-nav-toggle .hamburger {
    display: block;
    width: 24px;
    height: 2px;
    background: currentColor;
    position: relative;
    transition: var(--transition-smooth);
}

.mobile-nav-toggle .hamburger::before,
.mobile-nav-toggle .hamburger::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 2px;
    background: currentColor;
    transition: var(--transition-smooth);
}

.mobile-nav-toggle .hamburger::before {
    top: -8px;
}

.mobile-nav-toggle .hamburger::after {
    top: 8px;
}

.mobile-nav-toggle.active .hamburger {
    background: transparent;
}

.mobile-nav-toggle.active .hamburger::before {
    transform: rotate(45deg);
    top: 0;
}

.mobile-nav-toggle.active .hamburger::after {
    transform: rotate(-45deg);
    top: 0;
}

/* Mobile Navigation Overlay */
.mobile-nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: calc(var(--z-header) + 10);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-smooth);
    backdrop-filter: blur(4px);
}

.mobile-nav-overlay.show {
    opacity: 1;
    visibility: visible;
}

.mobile-nav-menu {
    position: absolute;
    top: 0;
    right: 0;
    width: 320px;
    max-width: 85vw;
    height: 100%;
    background: var(--white-color);
    transform: translateX(100%);
    transition: var(--transition-smooth);
    overflow-y: auto;
    box-shadow: var(--shadow-heavy);
    display: flex;
    flex-direction: column;
}

.mobile-nav-overlay.show .mobile-nav-menu {
    transform: translateX(0);
}

/* Mobile Menu Header */
.mobile-nav-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg) var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    background: var(--light-bg);
}

.mobile-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.mobile-brand-logo {
    height: 32px;
}

.mobile-brand-text {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary-color);
}

.mobile-brand-pro {
    color: var(--secondary-color);
}

.mobile-nav-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--dark-text);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--border-radius-sm);
    transition: var(--transition-smooth);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mobile-nav-close:hover {
    background: rgba(220, 53, 69, 0.1);
    color: var(--danger-color);
}

/* Mobile Navigation Links */
.mobile-nav-links {
    flex: 1;
    padding: var(--spacing-md);
}

.mobile-nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--dark-text);
    text-decoration: none;
    padding: var(--spacing-sm) var(--spacing-md);
    font-weight: 500;
    border-radius: var(--border-radius-sm);
    transition: var(--transition-smooth);
    margin-bottom: var(--spacing-xs);
}

.mobile-nav-link:hover {
    background: var(--light-bg);
    color: var(--primary-color);
    transform: translateX(4px);
}

.mobile-nav-link i {
    width: 20px;
    text-align: center;
    color: var(--secondary-color);
}

/* Mobile Navigation Actions */
.mobile-nav-actions {
    padding: var(--spacing-md);
    border-top: 1px solid var(--border-color);
    background: var(--light-bg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

/* =============================================================================
   HOMEPAGE SECTIONS
   ============================================================================= */

/* Hero Section */
.hero {
    background: var(--gradient-primary);
    color: var(--white-color);
    padding: var(--spacing-xxl) 0;
    position: relative;
    overflow: hidden;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><defs><pattern id="grid" width="50" height="50" patternUnits="userSpaceOnUse"><path d="M 50 0 L 0 0 0 50" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.mascot{
    z-index: 1;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-text {
    text-align: left;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: rgba(255, 107, 53, 0.2);
    color: var(--secondary-color);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    border: 1px solid rgba(255, 107, 53, 0.3);
}

.hero h1 {
    color: var(--white-color);
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.3rem;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-lg);
    max-width: 600px;
}

.exam-types-preview {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-lg);
}

.exam-badge {
    background: rgba(255, 255, 255, 0.15);
    color: var(--white-color);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--secondary-color);
    line-height: 1;
}

.stat-label { 
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.8);
    margin-top: 4px;
}

.hero-visual {
    position: relative;
    height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    
}

.hero-visual::before {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    background: var(--gradient-secondary);
    border-radius: 50%;
    opacity: 0.1;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

/* Section Title System */
.section-title {
    text-align: center;
    margin-bottom: var(--spacing-xxl);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.section-title h2 {
    position: relative;
    margin-bottom: var(--spacing-sm);
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--gradient-secondary);
    border-radius: 2px;
}

.section-title p {
    font-size: 1.2rem;
    color: var(--light-text);
    margin-top: var(--spacing-sm);
}

/* Supported Exams Section */
.supported-exams {
    padding: var(--spacing-xxl) 0;
    background: var(--light-bg);
}

.exam-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.exam-category {
    background: var(--white-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-light);
    transition: var(--transition-smooth);
    border: 1px solid var(--border-color);
}

.exam-category:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.category-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--light-bg);
}

.category-header i {
    font-size: 2rem;
    color: var(--secondary-color);
}

.category-header h3 {
    color: var(--primary-color);
    margin-bottom: 0;
}

.exam-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.exam-item {
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    background: var(--light-bg);
    transition: var(--transition-smooth);
}

.exam-item:hover {
    background: var(--secondary-color);
    color: var(--white-color);
    transform: translateX(5px);
}

.exam-item strong {
    display: block;
    font-weight: 600;
    margin-bottom: 2px;
}

.exam-item span {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* Features Section */
.features {
    padding: var(--spacing-xxl) 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.feature-item {
    background: var(--white-color);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-light);
    text-align: center;
    transition: var(--transition-smooth);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.feature-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-secondary);
}

.feature-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-heavy);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    color: var(--white-color);
    font-size: 2rem;
}

.feature-title {
    margin-bottom: var(--spacing-sm);
    color: var(--primary-color);
}

.feature-item p {
    color: var(--light-text);
    line-height: 1.6;
}

/* How It Works Section */
.how-it-works {
    padding: var(--spacing-xxl) 0;
    background: var(--light-bg);
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    position: relative;
}

.step-item {
    text-align: center;
    position: relative;
}

.step-number {
    width: 80px;
    height: 80px;
    background: var(--gradient-secondary);
    color: var(--white-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 800;
    margin: 0 auto var(--spacing-md);
    position: relative;
    z-index: 2;
}

.step-content h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--primary-color);
}

.step-content p {
    color: var(--light-text);
    line-height: 1.6;
}

/* Testimonials Section */
.testimonials {
    padding: var(--spacing-xxl) 0;
    background: var(--gradient-primary);
    color: var(--white-color);
    position: relative;
    overflow: hidden;
}

.testimonials::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="2" fill="rgba(255,255,255,0.05)"/></svg>');
    opacity: 0.3;
}

.testimonial-slider {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    position: relative;
    z-index: 2;
}

.testimonial-item {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition-smooth);
}

.testimonial-item:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.15);
}

.testimonial-content {
    position: relative;
    margin-bottom: var(--spacing-lg);
}

.quote-icon {
    font-size: 3rem;
    color: var(--secondary-color);
    opacity: 0.5;
    margin-bottom: var(--spacing-sm);
}

.testimonial-content p {
    font-size: 1.1rem;
    line-height: 1.7;
    font-style: italic;
}

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

.author-avatar {
    width: 60px;
    height: 60px;
    background: var(--gradient-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white-color);
    font-size: 1.5rem;
}

.author-info h4 {
    color: var(--white-color);
    margin-bottom: 4px;
}

.author-info p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
    margin-bottom: 4px;
}

.exam-score {
    background: var(--secondary-color);
    color: var(--white-color);
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 0.75rem;
    font-weight: 600;
}

/* Call to Action Section */
.cta {
    padding: var(--spacing-xxl) 0;
    background: var(--white-color);
    text-align: center;
}

.cta-content {
    max-width: 800px;
    margin: 0 auto;
}

.cta-icon {
    width: 100px;
    height: 100px;
    background: var(--gradient-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-lg);
    color: var(--white-color);
    font-size: 3rem;
}

.cta h2 {
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
}

.cta p {
    font-size: 1.2rem;
    color: var(--light-text);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.cta-features {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.cta-feature {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--light-text);
    font-size: 0.9rem;
}

.cta-feature i {
    color: var(--success-color);
    font-size: 1.1rem;
}

/* =============================================================================
   FOOTER STYLES
   ============================================================================= */
.main-footer {
    background: var(--primary-color);
    color: #f5f6fa;
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    margin-top: auto;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section:first-child {
    grid-column: 1;
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    height: 40px;
    margin-bottom: var(--spacing-md);
    filter: brightness(0) invert(1); /* Make logo white */
}

.footer-description {
    color: #cbd5e0;
    line-height: 1.6;
    margin: 0;
}

.footer-title {
    color: var(--white-color);
    font-size: 1rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-md);
}

.footer-links {
    list-style: none;
    margin: 0;
    padding: 0;
}

.footer-links li {
    margin-bottom: var(--spacing-xs);
}

.footer-links a {
    color: #cbd5e0;
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition-smooth);
    display: block;
    padding: 2px 0;
}

.footer-links a:hover {
    color: var(--secondary-color);
    text-decoration: underline;
    padding-left: var(--spacing-xs);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom-left p {
    color: #9ca3af;
    font-size: 0.875rem;
    margin: 0;
}

.footer-bottom-right {
    display: flex;
    align-items: center;
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--white-color);
    text-decoration: none;
    border-radius: 50%;
    transition: var(--transition-smooth);
    font-size: 1rem;
}

.social-link:hover {
    background: var(--secondary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
}

/* =============================================================================
   MODAL SYSTEM
   ============================================================================= */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: var(--z-modal-backdrop);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-smooth);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

.modal.show {
    opacity: 1;
    visibility: visible;
}

.modal-dialog {
    background: var(--white-color);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-heavy);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.8);
    transition: var(--transition-smooth);
}

.modal.show .modal-dialog {
    transform: scale(1);
}

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

.modal-title {
    margin: 0;
    color: var(--primary-color);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--light-text);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--border-radius-sm);
    transition: var(--transition-smooth);
}

.modal-close:hover {
    background: var(--light-bg);
    color: var(--danger-color);
}

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

.modal-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-end;
}

/* =============================================================================
   TOAST NOTIFICATION SYSTEM
   ============================================================================= */
.toast-container {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: var(--z-toast);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    max-width: 400px;
}

.toast {
    background: var(--white-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-medium);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    transform: translateX(100%);
    transition: var(--transition-smooth);
    border-left: 4px solid;
}

.toast.show {
    transform: translateX(0);
}

.toast-success { border-left-color: var(--success-color); }
.toast-error { border-left-color: var(--danger-color); }
.toast-warning { border-left-color: var(--warning-color); }
.toast-info { border-left-color: var(--info-color); }

.toast-content {
    flex: 1;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.toast-close {
    background: none;
    border: none;
    color: var(--light-text);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--border-radius-sm);
    transition: var(--transition-smooth);
}

.toast-close:hover {
    background: var(--light-bg);
}

/* =============================================================================
   LOADING OVERLAY
   ============================================================================= */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.9);
    z-index: calc(var(--z-modal) + 10);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: var(--spacing-md);
}

.loading-spinner {
    text-align: center;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--light-bg);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-text {
    color: var(--primary-color);
    font-weight: 600;
}

/* =============================================================================
   UTILITY CLASSES
   ============================================================================= */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 1.5rem; }
.mt-5 { margin-top: 3rem; }

.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 1.5rem; }
.mb-5 { margin-bottom: 3rem; }

.d-flex { display: flex; }
.d-block { display: block; }
.d-none { display: none; }

.justify-content-center { justify-content: center; }
.justify-content-between { justify-content: space-between; }
.align-items-center { align-items: center; }

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* =============================================================================
   RESPONSIVE DESIGN
   ============================================================================= */
@media (max-width: 900px) {
    /* Hide desktop navigation */
    .nav-menu,
    .nav-actions {
        display: none;
    }
    
    .mascot{
        width: 85%;
    }
    
    /* Show mobile toggle */
    .mobile-nav-toggle {
        display: flex;
    }
    
    /* Adjust brand font size */
    .brand-text {
        font-size: 1.3rem;
    }
    
    /* Footer responsive - 2x2 grid on tablets */
    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-md);
        text-align: left;
    }
    
    /* First section (brand) spans full width on tablet */
    .footer-section:first-child {
        grid-column: 1 / -1;
        text-align: center;
        margin-bottom: var(--spacing-sm);
    }
    
    .footer-brand {
        max-width: none;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-xs: 0.25rem;
        --spacing-sm: 0.75rem;
        --spacing-md: 1rem;
        --spacing-lg: 1.5rem;
        --spacing-xl: 2rem;
        --spacing-xxl: 2.5rem;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .hero {
        min-height: auto;
        padding: var(--spacing-xl) 0;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-text {
        text-align: center;
    }
    
    .hero-visual {
        order: -1;
        height: 300px;
    }
    
    .hero-stats {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .features-grid,
    .exam-categories {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-buttons .btn {
        width: 100%;
        max-width: 300px;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-buttons .btn {
        width: 100%;
        max-width: 300px;
    }
    
    .testimonial-slider {
        grid-template-columns: 1fr;
    }
    
    .process-steps {
        grid-template-columns: 1fr;
    }
    
    /* Footer - 2x2 grid for link sections on mobile */
    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-sm) var(--spacing-md);
        text-align: left;
    }
    
    /* Brand section spans full width and is centered */
    .footer-section:first-child {
        grid-column: 1 / -1;
        text-align: center;
        margin-bottom: var(--spacing-md);
    }
    
    /* Mobile menu adjustments */
    .mobile-nav-menu {
        width: 100%;
        max-width: none;
    }
}

@media (max-width: 480px) {
    .main-nav {
        padding: 0 var(--spacing-sm);
    }
    
    .mascot{
        width: 50%;
    }
    
    .brand-text {
        font-size: 1.2rem;
    }
    
    .exam-types-preview {
        justify-content: center;
    }
    
    .exam-badge {
        font-size: 0.8rem;
        padding: 4px 10px;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .feature-item,
    .exam-category {
        padding: var(--spacing-md);
    }
    
    /* Smaller footer elements on mobile */
    .footer-title {
        font-size: 0.875rem;
        margin-bottom: var(--spacing-xs);
    }
    
    .footer-links a {
        font-size: 0.8rem;
        line-height: 1.4;
    }
    
    .footer-description {
        font-size: 0.875rem;
        line-height: 1.5;
    }
    
    .footer-logo {
        height: 32px;
        margin-bottom: var(--spacing-xs);
    }
    
    .social-link {
        width: 36px;
        height: 36px;
        font-size: 0.9rem;
    }
    
    .footer-bottom-left p {
        font-size: 0.75rem;
    }
    
    .toast-container {
        top: var(--spacing-sm);
        right: var(--spacing-sm);
        left: var(--spacing-sm);
        max-width: none;
    }
    
    .modal {
        padding: var(--spacing-sm);
    }
}

/* =============================================================================
   ACCESSIBILITY AND FOCUS STYLES
   ============================================================================= */
*:focus {
    outline: 2px solid var(--secondary-color);
    outline-offset: 2px;
}

.nav-link:focus,
.btn:focus {
    outline-color: var(--white-color);
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .nav-link:hover,
    .nav-link.active {
        background: var(--white-color);
        color: var(--primary-color);
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Dark mode support (optional) */
@media (prefers-color-scheme: dark) {
    :root {
        --white-color: #1a1a1a;
        --light-bg: #2d2d2d;
        --dark-text: #e0e0e0;
        --light-text: #b0b0b0;
        --border-color: #404040;
    }
}

/* Print styles */
@media print {
    .hero,
    .cta,
    .testimonials {
        background: white !important;
        color: black !important;
    }
    
    .btn {
        border: 1px solid black;
        background: white;
        color: black;
    }
    
    .main-header,
    .main-footer,
    .mobile-nav-overlay,
    .modal,
    .toast-container {
        display: none !important;
    }
    
    body {
        padding-top: 0;
    }
}