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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    scroll-behavior: smooth;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid #e1e5e9;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    font-weight: 700;
    font-size: 1.5rem;
    color: #2563eb;
}

.nav-logo i {
    margin-right: 10px;
    font-size: 1.8rem;
}

.nav-menu {
    display: flex;
    gap: 30px;
}

.nav-link {
    text-decoration: none;
    color: #64748b;
    font-weight: 500;
    padding: 10px 0;
    position: relative;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: #2563eb;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: #2563eb;
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><polygon fill="%23ffffff08" points="0,0 1000,300 1000,1000 0,700"/></svg>');
    background-size: cover;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 40px;
    opacity: 0.95;
    font-weight: 400;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

.btn-primary, .btn-secondary, .btn-success {
    padding: 15px 30px;
    border: none;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    font-size: 1rem;
}

.btn-primary {
    background: #10b981;
    color: white;
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.4);
}

.btn-primary:hover {
    background: #059669;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(16, 185, 129, 0.6);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: white;
    color: #667eea;
    transform: translateY(-2px);
}

.btn-success {
    background: #10b981;
    color: white;
}

.btn-success:hover {
    background: #059669;
    transform: translateY(-2px);
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-top: 40px;
    position: relative;
    z-index: 2;
}

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

.stat-item h3 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 5px;
}

.stat-item p {
    opacity: 0.9;
    font-weight: 500;
}

/* About AKT Section */
.about-akt {
    padding: 80px 0;
    background: #f8fafc;
}

.about-akt h2 {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 60px;
    color: #1e293b;
}

.akt-overview {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    align-items: start;
}

.akt-info h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: #2563eb;
}

.akt-info p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 20px;
    color: #64748b;
}

.exam-format {
    background: white;
    padding: 30px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    border: 1px solid #e1e5e9;
}

.exam-format h4 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    color: #1e293b;
}

.exam-format ul {
    list-style: none;
}

.exam-format li {
    padding: 8px 0;
    border-bottom: 1px solid #f1f5f9;
    color: #64748b;
}

.exam-format li:last-child {
    border-bottom: none;
}

/* Specialties Section */
.specialties {
    padding: 80px 0;
    background: white;
}

.specialties h2 {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: #1e293b;
}

.section-intro {
    text-align: center;
    font-size: 1.2rem;
    color: #64748b;
    max-width: 600px;
    margin: 0 auto 60px;
    line-height: 1.7;
}

.specialties-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.specialty-card {
    background: white;
    padding: 30px;
    border-radius: 20px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    border: 1px solid #e1e5e9;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.specialty-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.specialty-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

.specialty-card:hover::before {
    transform: scaleX(1);
}

.specialty-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.specialty-icon i {
    font-size: 1.8rem;
    color: white;
}

.specialty-card h3 {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: #1e293b;
}

.specialty-card p {
    color: #64748b;
    line-height: 1.7;
    margin-bottom: 20px;
}

.question-count {
    background: #f1f5f9;
    color: #2563eb;
    padding: 8px 16px;
    border-radius: 25px;
    font-weight: 600;
    font-size: 0.9rem;
    display: inline-block;
}

/* AI Tutor Section */
.ai-tutor {
    padding: 80px 0;
    background: #f8fafc;
}

.ai-tutor h2 {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: #1e293b;
}

.tutor-interface {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 40px;
    margin-top: 40px;
}

.chat-container {
    background: white;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    overflow: hidden;
}

.chat-header {
    background: linear-gradient(135deg, #667eea, #764ba2);
    padding: 20px;
    color: white;
    display: flex;
    align-items: center;
    gap: 15px;
}

.tutor-avatar {
    width: 50px;
    height: 50px;
    background: rgba(255,255,255,0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tutor-avatar i {
    font-size: 1.5rem;
}

.tutor-info h4 {
    margin-bottom: 5px;
    font-weight: 600;
}

.status {
    font-size: 0.9rem;
    opacity: 0.9;
}

.chat-messages {
    padding: 20px;
    height: 300px;
    overflow-y: auto;
}

.message {
    margin-bottom: 20px;
}

.bot-message .message-content {
    background: #f1f5f9;
    padding: 15px 20px;
    border-radius: 20px 20px 20px 5px;
    color: #64748b;
}

.bot-message ul {
    margin: 10px 0;
    padding-left: 20px;
}

.bot-message li {
    margin: 5px 0;
}

.chat-input-container {
    padding: 20px;
    border-top: 1px solid #e1e5e9;
    display: flex;
    gap: 15px;
}

#chatInput {
    flex: 1;
    padding: 12px 20px;
    border: 1px solid #e1e5e9;
    border-radius: 25px;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s ease;
}

#chatInput:focus {
    border-color: #2563eb;
}

.send-btn {
    width: 50px;
    height: 50px;
    background: #2563eb;
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
}

.send-btn:hover {
    background: #1d4ed8;
    transform: scale(1.05);
}

.tutor-features {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.feature-item {
    background: white;
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    text-align: center;
}

.feature-item i {
    font-size: 2rem;
    color: #2563eb;
    margin-bottom: 15px;
    display: block;
}

.feature-item h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: #1e293b;
}

.feature-item p {
    color: #64748b;
    line-height: 1.6;
}

/* MCQ Bank Section */
.mcq-bank {
    padding: 80px 0;
    background: white;
}

.mcq-bank h2 {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: #1e293b;
}

.mcq-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 30px;
    margin: 40px 0;
    flex-wrap: wrap;
}

.specialty-filter {
    display: flex;
    align-items: center;
    gap: 15px;
}

.specialty-filter label {
    font-weight: 600;
    color: #1e293b;
}

#specialtySelect {
    padding: 12px 20px;
    border: 1px solid #e1e5e9;
    border-radius: 10px;
    font-size: 1rem;
    min-width: 200px;
    outline: none;
}

.quiz-container {
    background: white;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    padding: 30px;
    margin: 40px 0;
    border: 1px solid #e1e5e9;
}

.quiz-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid #e1e5e9;
}

.question-counter {
    font-weight: 600;
    color: #1e293b;
}

.quiz-timer {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #dc2626;
    font-weight: 600;
}

.question-card {
    margin-bottom: 30px;
}

.question-text {
    font-size: 1.2rem;
    line-height: 1.7;
    margin-bottom: 25px;
    color: #1e293b;
    padding: 20px;
    background: #f8fafc;
    border-radius: 15px;
    border-left: 4px solid #2563eb;
}

.options-container {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 30px;
}

.option {
    padding: 15px 20px;
    border: 2px solid #e1e5e9;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    background: white;
}

.option:hover {
    border-color: #2563eb;
    background: #f8fafc;
}

.option.selected {
    border-color: #2563eb;
    background: #eff6ff;
    color: #2563eb;
}

.quiz-actions {
    display: flex;
    gap: 15px;
    justify-content: center;
}

.performance-stats {
    margin-top: 60px;
    text-align: center;
}

.performance-stats h3 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 30px;
    color: #1e293b;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.stat-card {
    background: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    border: 1px solid #e1e5e9;
    transition: transform 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: #2563eb;
    margin-bottom: 10px;
}

.stat-label {
    color: #64748b;
    font-weight: 500;
}

/* Resources Section */
.resources {
    padding: 80px 0;
    background: #f8fafc;
}

.resources h2 {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 60px;
    color: #1e293b;
}

.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.resource-card {
    background: white;
    padding: 30px;
    border-radius: 20px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    text-align: center;
    transition: transform 0.3s ease;
    border: 1px solid #e1e5e9;
}

.resource-card:hover {
    transform: translateY(-5px);
}

.resource-card i {
    font-size: 3rem;
    color: #2563eb;
    margin-bottom: 20px;
}

.resource-card h4 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: #1e293b;
}

.resource-card p {
    color: #64748b;
    line-height: 1.6;
}

/* Footer */
.footer {
    background: #1e293b;
    color: white;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-section p {
    color: #94a3b8;
    line-height: 1.6;
    margin-bottom: 10px;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul li a {
    color: #94a3b8;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #334155;
    color: #94a3b8;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 30px;
    }
    
    .akt-overview {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .specialties-grid {
        grid-template-columns: 1fr;
    }
    
    .tutor-interface {
        grid-template-columns: 1fr;
    }
    
    .mcq-controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .specialty-filter {
        justify-content: center;
    }
    
    .quiz-actions {
        flex-direction: column;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 2rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}