/* Base styles */
:root {
    --primary-black: #121212;
    --royal-blue: #4169e1;
    --off-white: #FAF9F6;
    --gold: #d4a859;
    --beige: #eae6dc;
    --success-green: #28a745;
    --warning-orange: #fd7e14;
    --danger-red: #dc3545;
    --info-blue: #17a2b8;
}

/* Import Inter font from Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

body {
    margin: 0;
    padding: 0;
    font-family: 'Inter', sans-serif;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding-top: 60px; /* Account for fixed header */
}

/* Header styles */
.main-header {
    background-color: var(--primary-black);
    color: white;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 3rem;
    max-width: 1200px;
    margin: 0 auto;
}

nav {
    display: flex;
    gap: 2rem;
    align-items: center;
}

nav a {
    color: white;
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 500;
}

.nav-link {
    transition: color 0.2s ease;
}

.nav-link:hover {
    color: var(--gold);
}

.cta-button {
    background-color: var(--royal-blue);
    padding: 0.75rem 1.5rem;
    border-radius: 2rem;
    color: white;
    transition: transform 0.2s ease;
}

.cta-button:hover {
    transform: translateY(-2px);
}

/* Hero Section */
.hero-section {
    background-color: var(--beige);
    padding: 4rem 2rem;
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
}

.hero-text {
    flex: 1;
    max-width: 60%;
}

.hero-text h1 {
    font-size: 3rem;
    line-height: 1.2;
    font-weight: 700;
    margin: 2rem 0 1rem 2rem;
    color: var(--primary-black);
}

.hero-card {
    background: white;
    border-radius: 1rem;
    padding: 1.5rem;
    margin-left: 2rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    max-width: 500px;
}

.hero-card h2 {
    font-size: 1.75rem;
    margin: 0.5rem 0;
    color: var(--primary-black);
}

.hero-card p {
    font-size: 1.25rem;
    color: #555;
    margin-bottom: 1rem;
}

.hero-logo-image {
    width: 300px;
    height: auto;
    margin-left: 2rem;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .hero-content {
        flex-direction: column;
        text-align: center;
    }

    .hero-text {
        max-width: 100%;
    }

    .hero-text h1 {
        font-size: 2.5rem;
        margin: 1rem;
    }

    .hero-card {
        margin: 1rem;
    }
    .hero-card p {
        font-size: 1.15rem;
    }

    .hero-logo-image {
        width: 200px;
        margin: 2rem auto;
    }
}

@media (max-width: 480px) {
    .hero-section {
        padding: 2rem 1rem;
    }

    .hero-text h1 {
        font-size: 2rem;
    }

    .hero-card h2 {
        font-size: 1.5rem;
    }
    .hero-card p {
        font-size: 1.1rem;
    }
    .hero-logo-image {
        width: 150px;
    }
}

/* Features Section */
.features-section {
    padding: 3rem 2rem;
    background-color: var(--off-white);
    border-radius: 1rem;
}

.features-container {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.feature-icon {
    font-size: 2rem;
    color: var(--royal-blue);
    margin-bottom: 1rem;
}

/* General Description */
.general-description {
    background-color: var(--off-white);
    padding: 3rem;
}

.description-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    gap: 3rem;
}

/* University Endorsements */
.university-endorsements {
    background-color: var(--gold);
    padding: 4rem 2rem;
    text-align: center;
}

.university-endorsements h3 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 1rem;
    text-align: center;
    color: var(--primary-black);
}

/* Practice Section */
.practice-container {
    max-width: 1200px;
    margin: 3rem auto;
    padding: 0 2rem;
    min-height: calc(100vh - 120px);
}

.question-card {
    background: white;
    border-radius: 1rem;
    padding: 3.5rem;
    margin: 2rem auto;
    max-width: 900px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    min-height: auto;
    max-height: none;
    overflow: visible;
    height: auto;
}

.question-text {
    font-size: 1.25rem;
    line-height: 1.8;
    margin-bottom: 3.5rem;
    color: #333;
    padding: 2.5rem;
    background: var(--off-white);
    border-radius: 0.75rem;
    overflow-wrap: break-word;
    word-wrap: break-word;
}

/* Options styling */
.options-form {
    margin: 2.5rem 0;
}

.option {
    position: relative;
    margin: 2rem 0;
}

.option input[type="radio"] {
    position: absolute;
    opacity: 0;
    cursor: pointer;
}

.option-text {
    display: block;
    padding: 1.75rem 2.5rem;
    background: var(--off-white);
    border-radius: 0.75rem;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 1.2rem;
    line-height: 1.6;
    overflow-wrap: break-word;
    word-wrap: break-word;
}

.option input[type="radio"]:checked + .option-text {
    background: var(--royal-blue);
    color: white;
}

.option input[type="radio"]:checked + .option-text .option-letter {
    color: white;
}

.option-letter {
    font-weight: 600;
    color: var(--royal-blue);
    margin-right: 2rem;
    display: inline-block;
    width: 2rem;
}

.option-content {
    display: inline-block;
    max-width: calc(100% - 4rem);
}

/* Math content */
.math {
    display: inline-block;
    width: 100%;
    overflow-x: auto;
    overflow-y: hidden;
    padding: 0.5rem 0;
}

/* Feedback section */
.feedback-container {
    margin: 3rem 0;
    padding: 2.5rem;
    background: var(--off-white);
    border-radius: 0.75rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.feedback {
    font-family: Arial, sans-serif;
    font-size: 18px;
    padding: 1.5rem;
    border-radius: 0.75rem;
    margin: 1.5rem 0;
    text-align: center;
    font-weight: 600;
}

.feedback.correct {
    background-color: #e6f4ea;
    color: #1e7e34;
    border-left: 5px solid #1e7e34;
}

.feedback.incorrect {
    background-color: #fce8e8;
    color: #dc3545;
    border-left: 5px solid #dc3545;
}

.answer-detail {
    background-color: white;
    border-radius: 0.75rem;
    padding: 1.5rem;
    margin: 1.5rem 0;
    border-left: 5px solid #4169e1;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.correct-answer {
    font-family: Arial, sans-serif;
    font-size: 16px;
    padding: 1rem;
    background: #f8fcf8;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
    color: #1e7e34;
}

.your-answer {
    font-family: Arial, sans-serif;
    font-size: 16px;
    padding: 1rem;
    background: #fff9f9;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
    color: #dc3545;
}

/* Explanation styling */
.explanation {
    background-color: white;
    border-radius: 0.75rem;
    padding: 1.5rem;
    margin: 1.5rem 0;
    border-left: 5px solid #17a2b8;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.explanation h3 {
    margin-top: 0;
    color: #17a2b8;
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

.explanation-text {
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.choice-explanations {
    list-style-type: none;
    padding-left: 0;
    margin-bottom: 1.5rem;
}

.choice-explanation {
    padding: 0.8rem;
    border-bottom: 1px solid #eee;
    line-height: 1.5;
}

.choice-explanation.correct-choice {
    background-color: rgba(30, 126, 52, 0.1);
    border-radius: 0.5rem;
}

.concept-highlight {
    background-color: rgba(253, 126, 20, 0.1);
    border-radius: 0.75rem;
    padding: 1.2rem;
    margin-top: 1.5rem;
    border: 1px solid rgba(253, 126, 20, 0.3);
}

.concept-highlight h4 {
    color: #fd7e14;
    margin-top: 0;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Styling for correct/incorrect options */
.option.correct-option {
    background-color: rgba(30, 126, 52, 0.1);
    border: 1px solid #1e7e34;
}

.option.incorrect-option {
    background-color: rgba(220, 53, 69, 0.1);
    border: 1px solid #dc3545;
}
    line-height: 1.6;
}

.explanation {
    margin: 2.5rem 0;
    padding: 2rem;
    background: white;
    border-radius: 0.75rem;
}

.explanation h3 {
    margin-bottom: 1.5rem;
    color: var(--royal-blue);
    font-size: 1.3rem;
}

.choice-explanation {
    font-family: Arial, sans-serif;
    font-size: 16px;
    margin: 1.5rem 0;
    padding: 1.5rem;
    background: var(--off-white);
    border-radius: 0.75rem;
    line-height: 1.6;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .practice-container {
        padding: 0 1rem;
        margin: 2rem auto;
    }

    .question-card {
        padding: 2rem;
        margin: 1rem;
    }

    .question-text {
        font-size: 1.1rem;
        padding: 1.5rem;
    }

    .option-text {
        padding: 1.25rem 1.5rem;
        font-size: 1.1rem;
    }
}

@media (max-width: 480px) {
    .practice-container {
        padding: 0 0.5rem;
        margin: 1rem auto;
    }

    .question-card {
        padding: 1.5rem;
    }

    .question-text {
        font-size: 1rem;
        padding: 1rem;
    }

    .option-text {
        padding: 1rem 1.25rem;
        font-size: 1rem;
    }

    .feedback, .correct-answer, .choice-explanation {
        font-size: 14px;
        padding: 1rem;
    }
}
.dashboard-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    width: 100%;
    box-sizing: border-box;
}

.stats-card, .stats-section {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin: 1rem 0;
    width: 100%;
    box-sizing: border-box;
}

/* User Stats Section */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin: 1.5rem 0;
}

/* Mobile responsive adjustments for dashboard */
@media (max-width: 768px) {
    .dashboard-container {
        padding: 1.5rem 1rem;
    }
    
    .stats-card, .stats-section {
        padding: 1.5rem;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .dashboard-container {
        padding: 1rem 0.5rem;
    }
    
    .stats-card, .stats-section {
        padding: 1rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 0.75rem;
    }
    
    .stat-value {
        font-size: 1.75rem;
    }
    
    .stat-label {
        font-size: 0.8rem;
    }
}

.stat-item {
    text-align: center;
    padding: 1rem;
    border-radius: 0.5rem;
    background-color: #f8f9fa;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--royal-blue);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.9rem;
    color: #666;
}

.next-badge {
    margin-top: 2rem;
    padding: 1.5rem;
    background-color: #f8f9fa;
    border-radius: 0.5rem;
    text-align: left;
}

.next-badge h3 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: #333;
}

.progress-container {
    height: 10px;
    background-color: #e9ecef;
    border-radius: 5px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.progress-bar {
    height: 100%;
    background-color: var(--gold);
    border-radius: 5px;
}

.progress-label {
    font-size: 0.9rem;
    color: #666;
    text-align: right;
}

.recent-badges {
    margin-top: 2rem;
    padding: 1.5rem;
    background-color: #f8f9fa;
    border-radius: 0.5rem;
}

.recent-badges h3 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: #333;
}

.badges-mini {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: 1rem;
}

.badge-mini {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 80px;
}

.badge-icon-mini {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: white;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 0.5rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    font-size: 1.5rem;
}

.badge-label-mini {
    font-size: 0.8rem;
    text-align: center;
    color: #333;
}

.view-all-badges {
    display: inline-block;
    margin-top: 1rem;
    color: var(--royal-blue);
    text-decoration: none;
    font-weight: 500;
}

.view-all-badges:hover {
    text-decoration: underline;
}

/* Pricing Section */
.pricing-section {
    background-color: var(--off-white);
    padding: 4rem 2rem;
}

.pricing-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 2rem;
    color: #121212;
    font-family: 'Inter', sans-serif;
    padding-top: 2rem;
}

.pricing-container {
    background-color: var(--off-white);
    display: flex;
    justify-content: center;
    padding: 3rem;
    gap: 2rem;
    flex-wrap: wrap;
    min-height: calc(100vh - 120px);
    align-items: center;
}

.pricing-card {
    width: 350px;
    height: 450px;
    background-color: var(--royal-blue);
    color: white;
    border-radius: 1rem;
    padding: 2.5rem;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.pricing-card.featured {
    background-color: var(--royal-blue);
}

.pricing-card h3 {
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: 1rem;
}

.price {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.period {
    font-size: 1.25rem;
    opacity: 0.8;
    display: inline-block;
    vertical-align: middle;
}

.tagline {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

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

.features li {
    display: flex;
    align-items: center;
    font-size: 1rem;
    line-height: 1.5;
    margin-bottom: 1rem;
}

.features li i {
    width: 1rem;
    height: 1rem;
    margin-right: 0.75rem;
    color: white;
}

.select-button {
    display: block;
    width: 100%;
    padding: 1rem;
    border-radius: 2rem;
    background-color: white;
    color: #121212;
    font-weight: 600;
    text-align: center;
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: transform 0.2s;
    margin-top: auto;
}

.select-button:hover {
    transform: scale(1.05);
}


/* Responsive Design */
@media (max-width: 600px) {
    .pricing-container {
        padding: 2rem 1rem;
    }

    .pricing-card {
        width: 100%;
        max-width: 350px;
        font-size: 0.8em;
    }

    .price {
        font-size: 2.8rem;
    }
}

@media (min-width: 601px) and (max-width: 1024px) {
    .pricing-container {
        padding: 2rem;
    }

    .pricing-card {
        width: 300px;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* Responsive Design */
@media (max-width: 600px) {
    body {
        font-size: 14px;
    }

    .header-content {
        padding: 1rem;
    }

    .hero-section {
        padding: 6rem 1rem 2rem;
    }

    .hero-section h1 {
        font-size: 2rem;
    }

    .pricing-container {
        flex-direction: column;
        align-items: center;
    }

    .pricing-card {
        width: 100%;
        max-width: none;
    }

    .description-container {
        flex-direction: column;
    }
}

@media (min-width: 601px) and (max-width: 1024px) {
    .hero-section {
        padding: 7rem 2rem 3rem;
    }

    .pricing-container {
        padding: 0 2rem;
    }

    .description-container {
        padding: 0 2rem;
    }
}

/* AI Study Buddy Styles */
.buddy-message-container {
    max-width: 900px;
    margin: 1.5rem auto;
    padding: 1.5rem;
    background: white;
    border-radius: 1rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    animation: fadeIn 0.5s ease-out;
}

.buddy-avatar {
    width: 50px;
    height: 50px;
    background-color: var(--royal-blue);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.buddy-message {
    flex-grow: 1;
    font-size: 1.1rem;
    line-height: 1.6;
    color: #333;
}

.streak-counter {
    display: inline-block;
    padding: 0.4rem 0.8rem;
    background-color: #fff3cd;
    color: #856404;
    border-radius: 1rem;
    font-size: 0.9rem;
    font-weight: 500;
    margin-top: 0.5rem;
}

.streak-counter i {
    color: #f5a623;
    margin-right: 0.4rem;
}

.new-badges-container {
    max-width: 900px;
    margin: 1.5rem auto;
    padding: 1.5rem 2rem;
    background: #fff8e1;
    border-radius: 1rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    animation: fadeIn 0.5s ease-out;
    text-align: center;
}

.new-badges-container h3 {
    color: var(--gold);
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.badges-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    justify-content: center;
}

.badge-item {
    background: white;
    border-radius: 0.75rem;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    max-width: 350px;
}

.badge-icon {
    width: 50px;
    height: 50px;
    background-color: var(--gold);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.badge-details {
    text-align: left;
}

.badge-details h4 {
    font-size: 1.1rem;
    margin: 0 0 0.5rem 0;
    color: #333;
}

.badge-details p {
    font-size: 0.9rem;
    color: #666;
    margin: 0;
}

.badge-link {
    display: inline-block;
    margin-top: 1.5rem;
    color: var(--royal-blue);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

.badge-link:hover {
    color: var(--gold);
    text-decoration: underline;
}

/* Badge colors */
.text-primary {
    color: var(--royal-blue);
}

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

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

.text-danger {
    color: var(--danger-red);
}

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

/* Forms */
.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 0.5rem;
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    margin: 0.5rem 0;
}

.form-control:focus {
    outline: none;
    border-color: var(--royal-blue);
    box-shadow: 0 0 0 2px rgba(65, 105, 225, 0.1);
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

/* Buttons */
.btn {
    background-color: var(--royal-blue);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease;
}

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

.btn-secondary {
    background-color: var(--gold);
}

/* Tables */
.table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
}

.table th,
.table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

.table th {
    background-color: var(--royal-blue);
    color: white;
}

/* Footer */
.footer {
    margin-top: auto;
    background-color: var(--primary-black);
    color: white;
    padding: 2rem;
}

.footer-content {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

/* Footer navigation specific adjustments */
.footer-links {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    justify-content: center;
}

.footer-link {
    color: #aaa;
    text-decoration: none;
    font-family: 'Inter', sans-serif;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.2s ease;
}

.footer-link:hover,
.footer-link:focus {
    color: white;
    text-decoration: underline;
}

.features-container h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #121212;
    margin-bottom: 1rem;
    animation: fadeIn 1s ease-out;
}

.features-container p {
    font-size: 1.125rem;
    line-height: 1.6;
    color: #555;
    margin-bottom: 2rem;
    animation: fadeIn 1s ease-out;
}

.feature-screenshot {
    width: 100%;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    border-radius: 0.5rem;
    overflow: hidden;
}

.interface-image {
    width: 100%;
    height: auto;
    display: block;
}

.study-image {
    width: 50%;
    height: 12rem;
    object-fit: cover;
    border-radius: 0.5rem;
}

.logo-container {
    display: flex;
    justify-content: space-around;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
    margin-bottom: 4rem;
}

.uni-logo {
    height: 4rem;
    opacity: 0.8;
    transition: opacity 0.2s ease;
}

.uni-logo:hover {
    opacity: 1;
}

.announcement-content {
    max-width: 1200px;
    margin: 0 auto;
}

.feature-cards {
    display: flex;
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    flex: 1;
    background-color: rgba(255, 255, 255, 0.5);
    border-radius: 0.75rem;
    padding: 2rem;
    position: relative;
}

.content-examples {
    padding: 4rem 2rem;
    background-color: var(--off-white);
}

.content-examples h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-black);
    margin-bottom: 1rem;
    text-align: center;
}

.content-examples p {
    font-size: 1.125rem;
    color: #333;
    text-align: center;
    margin-bottom: 2rem;
}

.content-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    max-width: 1200px;
    margin: 0 auto 2rem;
}

.content-card {
    background: white;
    border-radius: 0.5rem;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: transform 0.2s ease;
}

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

.content-card img {
    width: 100%;
    height: 12rem;
    object-fit: cover;
}

.card-content {
    padding: 1.5rem;
}

.card-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-black);
    margin-bottom: 0.5rem;
}

.card-content p {
    font-size: 1rem;
    color: #595959;
    margin: 0;
    text-align: left;
}

.content-tagline {
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    color: var(--primary-black);
    margin: 3rem 0;
}

/* Footer */
.footer-upper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 3rem;
}

.footer-main {
    background-color: var(--primary-black);
    color: white;
    padding: 3rem 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 2rem;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.sr-only:focus {
    clip: auto;
    width: auto;
    height: auto;
    padding: 1rem;
    margin: 0;
    background: white;
    color: var(--primary-black);
    text-decoration: none;
    z-index: 2000;
    position: fixed;
    top: 1rem;
    left: 1rem;
}

/* Responsive Design */
@media (max-width: 600px) {
    .header-content {
        padding: 1rem;
    }

    nav a {
        font-size: 1.6rem;
    }

    .hero-section h1 {
        font-size: 2rem;
    }

    .description-container {
        flex-direction: column;
    }

    .study-image {
        width: 100%;
    }

    .content-cards {
        grid-template-columns: 1fr;
    }
    .pricing-container {
        flex-direction: column;
        align-items: center;
    }

    .pricing-card {
        width: 100%;
        max-width: none;
    }
    .content-examples h2 {
        font-size: 1.5rem;
    }

    .content-tagline {
        font-size: 1.5rem;
    }
    .logo-container {
        gap: 1rem;
    }

    .uni-logo {
        height: 2rem;
    }
}

@media (min-width: 601px) and (max-width: 1024px) {
    .content-cards {
        grid-template-columns: repeat(2, 1fr);
    }
    .pricing-container {
        padding: 0 1rem;
    }

    .pricing-card {
        width: 300px;
    }
    .uni-logo {
        height: 2.5rem;
    }
}

/* Interactive Elements */
.get-started-button:hover,
.cta-button:hover {
    transform: scale(1.1);
    transition: transform 0.2s ease;
}

/* Ensure sufficient contrast */
.hero-section p,
.description-container p {
    color: #333; /* WCAG AA compliant on light backgrounds */
    line-height: 1.6;
}

/* Updated font consistency */
body,
button,
input,
select,
textarea {
    font-family: 'Inter', sans-serif;
}

/* Ensure proper focus indicators */
a:focus,
button:focus {
    outline: 2px solid var(--royal-blue);
    outline-offset: 2px;
}

/* Improve tab navigation visibility */
.content-card:focus-within {
    outline: 2px solid var(--royal-blue);
    outline-offset: 2px;
}

.header-content nav a {
    color: white;
}

.card-content p {
    color: #595959;
}

.footer-link {
    color: #aaa;
}

.hero-section h1,
.hero-section p,
.content-examples h2,
.content-examples p,
.university-endorsements h3 {
    animation: fadeIn 1s ease-out;
}

/* Practice Page Styles */
.practice-container {
    max-width: 800px;
    margin: 80px auto 0;
    padding: 20px;
}

.question-card {
    background: white;
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.feedback {
    margin: 20px 0;
    padding: 10px;
    border-radius: 5px;
    font-family: 'Inter', sans-serif;
    font-size: 16px;
}

.wrong {
    color: red;
    font-family: 'Inter', sans-serif;
    font-size: 16px;
}

.correct {
    color: green;
    font-family: 'Inter', sans-serif;
    font-size: 16px;
}

.correct-answer {
    font-family: Arial, sans-serif;
    font-size: 16px;
    color: #333;
    margin: 10px 0;
}

.explanation {
    margin-top: 20px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 5px;
}

.choice-explanation {
    font-family: Arial, sans-serif;
    font-size: 16px;
    color: black;
    margin: 10px 0;
    line-height: 1.5;
}

.navigation-buttons {
    display: flex;
    justify-content: space-between;
    gap: 15px;
    margin-top: 30px;
}

.practice-button {
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-family: Arial, sans-serif;
    font-size: 18px;
    text-decoration: none;
    transition: transform 0.2s ease;
}

.practice-button.exit {
    background-color: #4169e1;
    color: white;
    border: none;
}

.practice-button.secondary {
    background-color: #f8f9fa;
    color: #333;
    border: 1px solid #ddd;
}

.practice-button:hover {
    transform: translateY(-2px);
}

/* Math rendering styles */
.math {
    display: inline-block;
    margin: 2px 0;
}

/* History Page Styles */
.history-table {
    width: 100%;
    margin: 20px 0;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.history-table table {
    width: 100%;
    border-collapse: collapse;
    background: white;
}

.history-table th {
    background: var(--royal-blue);
    color: white;
    padding: 15px;
    text-align: left;
    font-weight500;
}

.history-table td {
    padding: 15px;
    border-bottom: 1px solid #eee;
}

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

.history-filters {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.back-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--royal-blue);
    color: white;
    border-radius: 5px;
    text-decoration: none;
    transition: transform 0.2s ease;
}

.back-button:hover {
    transform: translateY(-2px);
}

.result {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-weight: 500;
}

.result.correct {
    color: #28a745;
}

.result.wrong {
    color: #dc3545;
}

.pagination {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 30px;
}

.page-link,
.current-page {
    padding: 8px 12px;
    border-radius: 5px;
    text-decoration: none;
}

.page-link {
    background: white;
    color: var(--royal-blue);
    border: 1px solid var(--royal-blue);
    transition: all 0.2s ease;
}

.page-link:hover {
    background: var(--royal-blue);
    color: white;
}

.current-page {
    background: var(--royal-blue);
    color: white;
}

.ellipsis {
    color: #666;
    padding: 8px 12px;
}

/* Enhanced Practice Page Styles */
.practice-container {
    max-width: 800px;
    margin: 80px auto 0;
    padding: 20px;
}

.question-card {
    background: white;
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.question-text {
    font-size: 1.2rem;
    line-height: 1.6;
    margin-bottom: 20px;
    color: #333;
}

.options-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.navigation-buttons {
    display: flex;
    justify-content: space-between;
    margin: 1.5rem 0;
    gap: 1rem;
}

.option {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    transition: all 0.2s ease;
}

.option:hover {
    border-color: var(--royal-blue);
    background: rgba(65, 105, 225, 0.05);
}

.option input[type="radio"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.option-text {
    flex: 1;
    font-size: 1.1rem;
    cursor: pointer;
}

.feedback-container {
    margin: 20px 0;
    padding: 20px;
    border-radius: 8px;
    background: #f8f9fa;
}

.feedback {
    font-size: 1.2rem;
    font-weight: 500;
    margin-bottom: 10px;
}

.correct-answer {
    font-size: 1.1rem;
    color: #666;
    margin: 10px 0;
}

.explanation {
    margin-top: 20px;
    padding: 15px;
    background: white;
    border-radius: 8px;
    border-left: 4px solid var(--royal-blue);
}

.choice-explanation {
    margin: 10px 0;
    font-size: 1rem;
    line-height: 1.5;
    color: #444;
}

.navigation-buttons {
    display: flex;
    justify-content: space-between;
    gap: 15px;
    margin-top: 30px;
}

.practice-button {
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s ease;
    border: none;
    cursor: pointer;
}

.practice-button.secondary {
    background: #f8f9fa;
    color: #444;
    border: 1px solid #ddd;
}

.practice-button.exit {
    background: var(--royal-blue);
    color: white;
}

.practice-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Responsive enhancements for mobile devices */
@media (max-width: 768px) {
    .practice-container {
        padding: 10px;
    }

    .question-card {
        padding: 20px;
    }

    .navigation-buttons {
        flex-direction: column;
    }

    .practice-button {
        width: 100%;
        text-align: center;
    }

    .history-table th,
    .history-table td {
        padding: 10px;
        font-size: 14px;
    }

    .history-table {
        font-size: 14px;
    }
}

/* Add these styles after the existing history-table styles */

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

.filter-form {
    display: flex;
    gap: 10px;
    align-items: center;
}

.filter-select {
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
    background: white;
}

.filter-button {
    padding: 8px 16px;
    background: var(--royal-blue);
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: transform 0.2s ease;
}

.filter-button:hover {
    transform: translateY(-2px);
}

/* Update the media queries for enhanced responsiveness */
@media (max-width: 768px) {
    .history-filters {
        flex-direction: column;
        gap: 15px;
    }

    .filter-controls {
        width: 100%;
    }

    .filter-form {
        width: 100%;
    }

    .filter-select {
        flex: 1;
    }

    .history-table {
        overflow-x: auto;
    }

    .history-table table {
        min-width: 800px;
    }

    .pagination {
        flex-wrap: wrap;
    }
}

@media (max-width: 480px) {
    .profile-container {
        padding: 10px;
    }

    .history-table td,
    .history-table th {
        padding: 8px;
        font-size: 14px;
    }

    .pagination {
        gap: 5px;
    }

    .page-link,
    .current-page {
        padding: 6px 10px;
        font-size: 14px;
    }
}

/* Main content */
main {
    flex: 1;
    background-color: var(--off-white);
}

/* Footer */
.footer {
    background: var(--primary-black);
    color: white;
    padding: 2rem 0;
    margin-top: auto;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    justify-content: center;
}

.footer-link {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.2s ease;
}

.footer-link:hover {
    color: white;
}

.footer-copyright {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.6);
}

/* Responsive Design */
@media (max-width: 600px) {
    .header-content {
        padding: 1rem;
    }

    nav {
        gap: 1rem;
    }

    nav a {
        font-size: 0.9rem;
    }

    .cta-button {
        padding: 0.5rem 1rem;
    }

    .footer-content {
        padding: 0 1rem;
    }

    .footer-links {
        gap: 1rem;
    }
}

@media (min-width: 601px) and (max-width: 1024px) {
    .header-content,
    .footer-content {
        padding: 0 2rem;
    }
}

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

.sr-only:focus {
    width: auto;
    height: auto;
    padding: 1rem;
    margin: 0;
    background: white;
    color: var(--primary-black);
    clip: auto;
    text-decoration: none;
    z-index: 2000;
    position: fixed;
    top: 1rem;
    left: 1rem;
}

/* Feedback styles */
.feedback {
    font-family: Arial, sans-serif;
    font-size: 16px;
    padding: 1rem;
    border-radius: 0.5rem;
    margin: 1rem 0;
    text-align: center;
}

.feedback.correct {
    background-color: #e6f4ea;
    color: #1e7e34;
}

.feedback.incorrect {
    background-color: #fce8e8;
    color: #dc3545;
}

.correct-answer {
    font-family: Arial, sans-serif;
    font-size: 16px;
    padding: 1rem;
    background: var(--off-white);
    border-radius: 0.5rem;
    margin: 1rem 0;
}

.explanation {
    background: var(--off-white);
    padding: 1.5rem;
    border-radius: 0.5rem;
    margin: 1.5rem 0;
}

.choice-explanation {
    font-family: Arial, sans-serif;
    font-size: 16px;
    margin: 0.75rem 0;
    padding: 0.5rem;
    border-radius: 0.25rem;
    background: white;
}

.option {
    position: relative;
    margin: 1rem 0;
}

.option input[type="radio"] {
    position: absolute;
    opacity: 0;
}

.option-text {
    display: block;
    padding: 1rem 1.5rem;
    background: var(--off-white);
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.option-letter {
    font-weight: 600;
    color: var(--royal-blue);
    margin-right: 1rem;
    display: inline-block;
    width: 1.5rem;
}

.option-content {
    display: inline-block;
    margin-left: 0.5rem;
    font-size: 1.1rem;
}

.mjx-chtml {
    font-size: 110% !important;
    margin: 0.5rem 0 !important;
    padding: 0 !important;
    display: inline-block !important;
    line-height: 0;
    text-indent: 0;
    text-align: left;
    text-transform: none;
    font-weight: normal;
    font-style: normal;
    font-size: 100%;
    font-family: MJXZERO, MJXTEX;
    direction: ltr;
}

/* Responsive adjustments for math content */
@media (max-width: 600px) {
    .option-content {
        font-size: 0.9rem;
    }

    .mjx-chtml {
        font-size: 100% !important;
    }

    .question-text .mjx-chtml {
        max-width: 100%;
        overflow-x: auto;
    }
}

@media (min-width: 601px) and (max-width: 1024px) {
    .option-content {
        font-size: 1rem;
    }
}

.uni-logo {
    height: 4rem;
    opacity: 0.8;
    transition: opacity 0.2s ease;
}

.uni-logo:hover {
    opacity: 1;
}

.pricing-card .features li {
    margin-bottom: 0.5rem;
}

.pricing-card .features li::before {
    content: "\2022";
    margin-right: 0.5rem;
}

/* Exams Covered Section */
.exams-covered {
    background-color: var(--beige);
    padding: 4rem 2rem;
}

.exams-covered h2 {
    font-size: 2rem;
    text-align: center;
    margin: 2rem 0;
    color: var(--primary-black);
}

.exam-cards {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    padding: 2rem;
}

.exam-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    background-color: var(--royal-blue);
    padding: 1.5rem;
    border-radius: 0.5rem;
    width: 150px;
}

.exam-logo {
    width: 100px;
    height: auto;
    object-fit: contain;
}

.exam-name {
    color: white;
    font-size: 1.5rem;
    font-weight: 500;
}

/* Responsive design for exam section */
@media (max-width: 768px) {
    .exam-cards {
        gap: 1rem;
    }

    .exam-card {
        width: 130px;
    }

    .exam-logo {
        width: 80px;
    }

    .exam-name {
        font-size: 1.25rem;
    }
}

@media (max-width: 480px) {
    .exams-covered {
        padding: 2rem 1rem;
    }

    .exam-card {
        width: 110px;
    }

    .exam-logo {
        width: 60px;
    }

    .exam-name {
        font-size: 1rem;
    }
}
/* Authentication Pages Styling */
.auth-container {
    max-width: 500px;
    margin: 4rem auto;
    padding: 2.5rem;
    background-color: white;
    border-radius: 1rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.auth-container h1 {
    color: var(--primary-black);
    font-size: 2rem;
    margin-bottom: 2rem;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}

.auth-container h1 i {
    color: var(--royal-blue);
}

.auth-form {
    margin-top: 2rem;
}

.form-group {
    margin-bottom: 1.75rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.75rem;
    font-weight: 500;
    color: #333;
    font-size: 1.1rem;
}

.form-control {
    width: 100%;
    padding: 1rem;
    border: 2px solid #e0e0e0;
    border-radius: 0.75rem;
    font-size: 1.1rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-control:focus {
    border-color: var(--royal-blue);
    box-shadow: 0 0 0 3px rgba(65, 105, 225, 0.2);
    outline: none;
}

.form-control::placeholder {
    color: #aaa;
}

.auth-button {
    width: 100%;
    padding: 1rem;
    background-color: var(--royal-blue);
    color: white;
    border: none;
    border-radius: 0.75rem;
    font-size: 1.2rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease;
    margin-top: 1rem;
}

.auth-button:hover {
    background-color: #3458c7;
    transform: translateY(-2px);
}

.auth-button:active {
    transform: translateY(0);
}

.auth-links {
    margin-top: 2rem;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.auth-link {
    color: #666;
    text-decoration: none;
    font-size: 1rem;
    transition: color 0.2s ease;
}

.auth-link a {
    color: var(--royal-blue);
    font-weight: 500;
    text-decoration: none;
    transition: color 0.2s ease, border-bottom 0.2s ease;
    border-bottom: 1px solid transparent;
}

.auth-link a:hover {
    color: #3458c7;
    border-bottom: 1px solid #3458c7;
}

.forgot-password {
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.forgot-password i {
    color: var(--royal-blue);
}

.flash-message {
    padding: 1rem;
    border-radius: 0.75rem;
    margin-bottom: 1.5rem;
    font-weight: 500;
    text-align: center;
    animation: fadeIn 0.5s ease-out;
}

.flash-message.success {
    background-color: rgba(40, 167, 69, 0.1);
    color: #28a745;
    border: 1px solid rgba(40, 167, 69, 0.2);
}

.flash-message.error {
    background-color: rgba(220, 53, 69, 0.1);
    color: #dc3545;
    border: 1px solid rgba(220, 53, 69, 0.2);
}

.error-message {
    color: #dc3545;
    font-size: 0.9rem;
    margin-top: 0.5rem;
    display: block;
}

/* Shake animation for invalid input */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
    20%, 40%, 60%, 80% { transform: translateX(5px); }
}

.form-control.is-invalid {
    border-color: #dc3545;
    animation: shake 0.6s ease-in-out;
}

@media (max-width: 600px) {
    .auth-container {
        margin: 2rem 1rem;
        padding: 1.5rem;
    }
    
    .auth-container h1 {
        font-size: 1.75rem;
    }
    
    .form-control {
        font-size: 1rem;
        padding: 0.75rem;
    }
    
    .auth-button {
        font-size: 1.1rem;
    }
}