/* ============================================
   CSS Variables & Reset
   ============================================ */
:root {
    --primary-color: #FF6B35;
    --primary-dark: #E85A2B;
    --secondary-color: #2C3E50;
    --accent-color: #F39C12;
    --text-dark: #2C3E50;
    --text-light: #7F8C8D;
    --bg-light: #F8F9FA;
    --bg-white: #FFFFFF;
    --border-color: #E0E0E0;
    --success-color: #27AE60;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
}

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

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-dark);
}

h2 {
    font-size: 2.5rem;
}

h3 {
    font-size: 1.75rem;
}

h4 {
    font-size: 1.25rem;
}

p {
    margin-bottom: 1rem;
    color: var(--text-light);
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

/* ============================================
   Buttons
   ============================================ */
.btn-primary, .btn-secondary, .btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    text-align: center;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

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

.btn-outline {
    background-color: transparent;
    color: var(--text-dark);
    border-color: var(--border-color);
}

.btn-outline:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-large {
    padding: 16px 32px;
    font-size: 1.1rem;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.9rem;
}

/* ============================================
   Navigation
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--bg-white);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
}

.logo a {
    display: flex;
    align-items: center;
    text-decoration: none;
    transition: var(--transition);
}

.logo a:hover {
    opacity: 0.9;
}

.logo-image {
    height: 50px;
    width: auto;
    max-width: 200px;
    object-fit: contain;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: var(--text-dark);
    font-weight: 500;
    position: relative;
    padding: 0.5rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: var(--transition);
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}


.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-dark);
    cursor: pointer;
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    margin-top: 80px;
    padding: 4rem 0;
    background: linear-gradient(135deg, #FFF5F2 0%, #FFFFFF 100%);
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-text {
    animation: fadeInLeft 0.8s ease;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background-color: #FFF5F2;
    border: 1px solid var(--primary-color);
    border-radius: 20px;
    color: var(--primary-color);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

.highlight {
    color: var(--primary-color);
}

.hero-description {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    color: var(--text-light);
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}


.hero-image {
    position: relative;
    animation: fadeInRight 0.8s ease;
}

.image-wrapper {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

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

.overlay-card {
    position: absolute;
    background: white;
    padding: 12px 20px;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    color: var(--text-dark);
    z-index: 10;
    transition: var(--transition);
    cursor: pointer;
}

.overlay-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    background: var(--primary-color);
    color: white;
}

.overlay-card:hover i {
    color: white;
}

.overlay-card.top-right {
    top: 20px;
    right: 20px;
}

.overlay-card.bottom-right {
    bottom: 20px;
    right: 20px;
}

.overlay-card i {
    color: var(--primary-color);
    font-size: 1.2rem;
}

/* ============================================
   Statistics Section
   ============================================ */
.statistics {
    padding: 3rem 0;
    background-color: var(--bg-white);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.stat-item {
    text-align: center;
    padding: 2rem;
    background: linear-gradient(135deg, #FFF5F2 0%, #FFFFFF 100%);
    border-radius: 15px;
    transition: var(--transition);
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.stat-number {
    font-size: 3rem;
    color: var(--primary-color);
    font-weight: 800;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1.1rem;
    color: var(--text-dark);
    font-weight: 600;
    margin: 0;
}

/* ============================================
   Section Headers
   ============================================ */
.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* ============================================
   Features Section
   ============================================ */
.features {
    padding: 5rem 0;
    background-color: var(--bg-light);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.feature-card {
    background: white;
    padding: 2.5rem;
    border-radius: 15px;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, #FFF5F2 0%, #FFFFFF 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--primary-color);
}

.feature-card h3 {
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.feature-card p {
    color: var(--text-light);
    line-height: 1.8;
}

/* ============================================
   Onboarding Section
   ============================================ */
.onboarding {
    padding: 5rem 0;
    background-color: var(--bg-white);
}

.onboarding-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.onboarding-text {
    animation: fadeInLeft 0.8s ease;
}

.benefits-list {
    list-style: none;
    margin: 2rem 0;
}

.benefits-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 1rem;
    color: var(--text-dark);
    font-size: 1.05rem;
}

.benefits-list i {
    color: var(--success-color);
    font-size: 1.2rem;
}

.onboarding-cta {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}

.onboarding-image {
    animation: fadeInRight 0.8s ease;
}

.onboarding-image img {
    width: 100%;
    border-radius: 15px;
    box-shadow: var(--shadow-lg);
}

/* ============================================
   Profile Discovery Section
   ============================================ */
.profile-discovery {
    padding: 5rem 0;
    background-color: var(--bg-light);
}

.search-section {
    margin-bottom: 2rem;
}

.search-box {
    display: flex;
    gap: 1rem;
    background: white;
    padding: 1.5rem;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
    flex-wrap: wrap;
}

.search-input-group {
    flex: 1;
    min-width: 200px;
    position: relative;
    display: flex;
    align-items: center;
}

.search-input-group i {
    position: absolute;
    left: 15px;
    color: var(--text-light);
}

.search-input-group input {
    width: 100%;
    padding: 12px 15px 12px 45px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: var(--transition);
}

.search-input-group input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.filters {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    justify-content: center;
}

.filter-btn {
    padding: 10px 20px;
    border: 2px solid var(--border-color);
    background: white;
    border-radius: 25px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
    color: var(--text-dark);
}

.filter-btn:hover,
.filter-btn.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.profiles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

.profile-card {
    background: white;
    padding: 1.5rem;
    border-radius: 15px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.profile-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.profile-header {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.profile-avatar {
    position: relative;
    width: 70px;
    height: 70px;
    border-radius: 50%;
    overflow: visible;
    flex-shrink: 0;
}

.profile-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

.verified-badge {
    position: absolute;
    bottom: -2px;
    right: -2px;
    background: var(--success-color);
    color: white;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    border: 2px solid white;
    z-index: 10;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.profile-info h3 {
    font-size: 1.25rem;
    margin-bottom: 0.25rem;
}

.profile-subject {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.rating {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.9rem;
}

.rating i {
    color: #FFC107;
}

.rating span {
    color: var(--text-light);
    margin-left: 5px;
}

.profile-details {
    margin: 1rem 0;
    padding: 1rem 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.profile-details p {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-dark);
}

.profile-details i {
    color: var(--primary-color);
    width: 20px;
}

.profile-actions {
    display: flex;
    gap: 0.75rem;
}

.profile-actions button {
    flex: 1;
    padding: 8px 16px;
    font-size: 0.875rem;
    min-height: auto;
    height: auto;
    text-align: center;
    font-weight: 400;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ============================================
   Testimonials Section
   ============================================ */
.testimonials {
    padding: 5rem 0;
    background-color: var(--bg-light);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.testimonial-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.testimonial-rating {
    display: flex;
    gap: 4px;
    margin-bottom: 1rem;
}

.testimonial-rating i {
    color: #FFC107;
    font-size: 1rem;
}

.testimonial-text {
    color: var(--text-light);
    font-size: 1rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.testimonial-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
}

.testimonial-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.testimonial-info h4 {
    margin-bottom: 0.25rem;
    color: var(--text-dark);
    font-size: 1rem;
}

.testimonial-info p {
    color: var(--text-light);
    font-size: 0.875rem;
    margin: 0;
}

/* ============================================
   Study Materials Section
   ============================================ */
.study-materials {
    padding: 5rem 0;
    background-color: var(--bg-light);
}

.materials-tabs {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 12px 30px;
    border: 2px solid var(--border-color);
    background: white;
    border-radius: 25px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
    color: var(--text-dark);
}

.tab-btn:hover,
.tab-btn.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

.materials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 2rem;
}

.material-card {
    background: white;
    padding: 2.5rem 2rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.material-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-dark));
    transform: scaleX(0);
    transition: var(--transition);
}

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

.material-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.material-icon-wrapper {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, #FFF5F2 0%, #FFFFFF 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    border: 2px solid transparent;
}

.material-card:hover .material-icon-wrapper {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    transform: scale(1.1) rotate(5deg);
    border-color: rgba(255, 255, 255, 0.2);
}

.material-icon-wrapper i {
    font-size: 2.5rem;
    color: var(--primary-color);
    transition: var(--transition);
}

.material-card:hover .material-icon-wrapper i {
    color: white;
    transform: scale(1.1);
}

.material-card h4 {
    margin-bottom: 0.75rem;
    color: var(--text-dark);
    font-size: 1.25rem;
    font-weight: 600;
}

.material-card p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
    line-height: 1.6;
    min-height: 48px;
}

.material-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: var(--primary-color);
    color: white;
    border-radius: 8px;
    font-weight: 500;
    font-size: 0.95rem;
    text-decoration: none;
    transition: var(--transition);
    border: 2px solid var(--primary-color);
}

.material-btn:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    color: white;
}

.material-btn i {
    font-size: 0.875rem;
    transition: var(--transition);
}

.material-btn:hover i {
    transform: translateX(3px);
}

/* ============================================
   Q&A Section
   ============================================ */
.qna {
    padding: 5rem 0;
    background-color: var(--bg-white);
}

.qna-content {
    max-width: 900px;
    margin: 0 auto;
}

.ask-question-box {
    background: linear-gradient(135deg, #FFF5F2 0%, #FFFFFF 100%);
    padding: 2rem;
    border-radius: 15px;
    margin-bottom: 3rem;
    box-shadow: var(--shadow-sm);
}

.ask-question-box h3 {
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

.question-form textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    resize: vertical;
    margin-bottom: 1rem;
    transition: var(--transition);
}

.question-form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-row {
    display: flex;
    gap: 1rem;
}

.form-row select {
    flex: 1;
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
}

.form-row select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.questions-list h3 {
    margin-bottom: 2rem;
    color: var(--text-dark);
}

.question-item {
    background: white;
    padding: 1.5rem;
    border-radius: 15px;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.question-item:hover {
    box-shadow: var(--shadow-md);
}

.question-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.question-header h4 {
    flex: 1;
    color: var(--text-dark);
}

.question-category {
    padding: 5px 15px;
    background: var(--primary-color);
    color: white;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.question-text {
    color: var(--text-light);
    margin-bottom: 1rem;
    line-height: 1.8;
}

.question-meta {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    font-size: 0.9rem;
    color: var(--text-light);
}

.question-meta i {
    margin-right: 5px;
    color: var(--primary-color);
}

.question-author {
    color: var(--text-dark);
    font-weight: 500;
}

.view-answers-btn {
    font-weight: 400 !important;
}

/* ============================================
   Contact Section
   ============================================ */
.contact {
    padding: 5rem 0;
    background-color: var(--bg-light);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 4rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-item {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
}

.contact-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-top: 5px;
    flex-shrink: 0;
}

.contact-item h4 {
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.contact-item p {
    color: var(--text-light);
    margin: 0;
}

.contact-form {
    background: white;
    padding: 2.5rem;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group textarea {
    resize: vertical;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background-color: var(--secondary-color);
    color: white;
    padding: 3rem 0 1.5rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    color: white;
    margin-bottom: 1.5rem;
    font-size: 1.25rem;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-link {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.social-link:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    transition: var(--transition);
}

.footer-links a:hover {
    color: white;
    padding-left: 5px;
}

.footer-contact {
    list-style: none;
}

.footer-contact li {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 1rem;
    color: rgba(255, 255, 255, 0.8);
}

.footer-contact i {
    color: var(--primary-color);
    width: 20px;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
}

.footer-bottom p {
    margin-bottom: 0.5rem;
    color: rgba(255, 255, 255, 0.7);
}

.footer-bottom i {
    color: var(--primary-color);
}

/* ============================================
   Back to Top Button
   ============================================ */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-5px);
}

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

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1200px) {
    .container {
        padding: 0 30px;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .section-title {
        font-size: 2.25rem;
    }
}

@media (max-width: 1024px) {
    .hero-content,
    .onboarding-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .profiles-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .materials-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .accessibility-controls {
        bottom: 80px;
        right: 20px;
    }
    
    .accessibility-toggle {
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }
    
    .nav-wrapper {
        padding: 0.75rem 0;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-md);
        padding: 2rem 0;
        gap: 0;
        max-height: calc(100vh - 70px);
        overflow-y: auto;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-menu li {
        width: 100%;
        padding: 1rem 0;
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-menu li:last-child {
        border-bottom: none;
    }

    .mobile-menu-toggle {
        display: block;
    }

    
    .nav-actions {
        gap: 0.5rem;
    }
    
    .nav-actions .btn-primary {
        padding: 8px 16px;
        font-size: 0.9rem;
        display: none;
    }

    .hero {
        padding: 3rem 0;
        margin-top: 70px;
    }
    
    .hero-title {
        font-size: 2.25rem;
        line-height: 1.2;
    }
    
    .hero-description {
        font-size: 1rem;
    }

    .section-title {
        font-size: 1.75rem;
    }
    
    .section-subtitle {
        font-size: 1rem;
    }

    .features-grid,
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .profiles-grid {
        grid-template-columns: 1fr;
    }

    .materials-grid {
        grid-template-columns: 1fr;
    }
    
    .materials-tabs {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .tab-btn {
        width: 100%;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .search-box {
        flex-direction: column;
        padding: 1rem;
    }

    .search-input-group {
        width: 100%;
    }
    
    .search-box .btn-primary {
        width: 100%;
        justify-content: center;
    }

    .hero-cta,
    .onboarding-cta {
        flex-direction: column;
        gap: 0.75rem;
    }

    .hero-cta .btn-primary,
    .hero-cta .btn-secondary,
    .onboarding-cta .btn-primary,
    .onboarding-cta .btn-secondary {
        width: 100%;
        justify-content: center;
    }
    
    .statistics {
        padding: 2rem 0;
    }
    
    .stat-item {
        padding: 1.5rem;
    }
    
    .stat-number {
        font-size: 2.5rem;
    }
    
    .features,
    .onboarding,
    .profile-discovery,
    .testimonials,
    .study-materials,
    .qna,
    .contact {
        padding: 3rem 0;
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .feature-card,
    .profile-card,
    .material-card {
        padding: 1.5rem;
    }
    
    .overlay-card {
        padding: 8px 12px;
        font-size: 0.85rem;
    }
    
    .overlay-card.top-right {
        top: 10px;
        right: 10px;
    }
    
    .overlay-card.bottom-right {
        bottom: 10px;
        right: 10px;
    }
    
    .accessibility-controls {
        bottom: 70px;
        right: 15px;
    }
    
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
    }
    
    .contact-content {
        gap: 2rem;
    }
    
    .contact-form {
        padding: 1.5rem;
    }
    
    .ask-question-box {
        padding: 1.5rem;
    }
    
    .question-item {
        padding: 1rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .logo-image {
        height: 40px;
        max-width: 150px;
    }

    .hero {
        padding: 2rem 0;
    }

    .hero-title {
        font-size: 1.75rem;
    }
    
    .hero-description {
        font-size: 0.95rem;
    }
    
    .badge {
        font-size: 0.75rem;
        padding: 6px 12px;
    }

    .section-title {
        font-size: 1.5rem;
    }
    
    .section-subtitle {
        font-size: 0.95rem;
    }

    .materials-grid {
        grid-template-columns: 1fr;
    }

    .form-row {
        flex-direction: column;
        gap: 0.75rem;
    }

    .profile-actions {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .profile-actions button {
        width: 100%;
        padding: 8px 16px;
        font-size: 0.875rem;
    }
    
    .filters {
        gap: 0.5rem;
    }
    
    .filter-btn {
        padding: 8px 16px;
        font-size: 0.9rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .stat-label {
        font-size: 1rem;
    }
    
    .feature-icon {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }
    
    .feature-card h3 {
        font-size: 1.25rem;
    }
    
    .benefits-list li {
        font-size: 0.95rem;
    }
    
    .accessibility-controls {
        bottom: 60px;
        right: 10px;
    }
    
    .accessibility-toggle {
        width: 45px;
        height: 45px;
        font-size: 1.1rem;
    }
    
    .accessibility-menu {
        min-width: 180px;
        right: -10px;
    }
    
    .back-to-top {
        width: 40px;
        height: 40px;
        font-size: 1rem;
        bottom: 15px;
        right: 15px;
    }
    
    .btn-primary,
    .btn-secondary,
    .btn-outline {
        padding: 10px 20px;
        font-size: 0.95rem;
    }
    
    .btn-large {
        padding: 14px 28px;
        font-size: 1rem;
    }
}

@media (max-width: 360px) {
    .hero-title {
        font-size: 1.5rem;
    }
    
    .section-title {
        font-size: 1.25rem;
    }
    
    .stat-number {
        font-size: 1.75rem;
    }
    
    .logo-image {
        height: 35px;
        max-width: 120px;
    }
    
}

/* ============================================
   Accessibility
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .hero-text,
    .hero-image,
    .onboarding-text,
    .onboarding-image {
        animation: none;
    }
    
    .feature-card:hover,
    .profile-card:hover,
    .material-card:hover {
        transform: none;
    }
}

/* Touch device optimizations */
@media (hover: none) and (pointer: coarse) {
    .btn-primary,
    .btn-secondary,
    .btn-outline,
    .filter-btn,
    .tab-btn {
        min-height: 44px;
        min-width: 44px;
    }
    
    .nav-link {
        padding: 1rem 0;
    }
    
    .social-link {
        width: 44px;
        height: 44px;
    }
    
    .profile-actions button,
    .search-box button {
        min-height: 44px;
    }
    
    .accessibility-toggle,
    .back-to-top {
        min-width: 44px;
        min-height: 44px;
    }
}

/* Ensure images are responsive */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Prevent horizontal scroll */
html, body {
    overflow-x: hidden;
    width: 100%;
}

/* Landscape orientation for mobile */
@media (max-width: 768px) and (orientation: landscape) {
    .hero {
        padding: 2rem 0;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .nav-menu {
        max-height: calc(100vh - 70px);
    }
}

/* High contrast media query */
@media (prefers-contrast: high) {
    :root {
        --text-dark: #000000;
        --text-light: #333333;
        --border-color: #000000;
    }
    
    .btn-primary {
        border-width: 3px;
    }
    
    .btn-secondary {
        border-width: 3px;
    }
}

/* Focus styles for accessibility */
button:focus,
a:focus,
input:focus,
select:focus,
textarea:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Additional utility classes for SEO and UX */
.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;
}

/* High Contrast Mode */
body.high-contrast {
    --text-dark: #000000;
    --text-light: #333333;
    --bg-light: #FFFFFF;
    --bg-white: #FFFFFF;
    --border-color: #000000;
    background: #FFFFFF;
    color: #000000;
}

body.high-contrast .btn-primary {
    background: #000000;
    border-color: #000000;
    color: #FFFFFF;
}

body.high-contrast .btn-primary:hover {
    background: #333333;
}

body.high-contrast .btn-secondary {
    border-color: #000000;
    color: #000000;
}

body.high-contrast .btn-secondary:hover {
    background: #000000;
    color: #FFFFFF;
}

/* Font Size Adjustments */
body.font-large {
    font-size: 1.125rem;
}

body.font-large h1 { font-size: 3rem; }
body.font-large h2 { font-size: 2.25rem; }
body.font-large h3 { font-size: 1.5rem; }
body.font-large h4 { font-size: 1.125rem; }

body.font-xlarge {
    font-size: 1.25rem;
}

body.font-xlarge h1 { font-size: 3.5rem; }
body.font-xlarge h2 { font-size: 2.5rem; }
body.font-xlarge h3 { font-size: 1.75rem; }
body.font-xlarge h4 { font-size: 1.25rem; }

body.font-small {
    font-size: 0.875rem;
}

body.font-small h1 { font-size: 2rem; }
body.font-small h2 { font-size: 1.75rem; }
body.font-small h3 { font-size: 1.25rem; }
body.font-small h4 { font-size: 1rem; }

/* Loading states */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

/* Status announcements for screen readers */
[role="status"] {
    position: absolute;
    left: -10000px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

/* Print styles */
@media print {
    .navbar,
    .back-to-top,
    .hero-cta,
    .onboarding-cta,
    .search-box,
    .filters,
    .contact-form,
    .ask-question-box {
        display: none;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.5;
    }
    
    .section-title {
        page-break-after: avoid;
    }
}


/* Accessibility Controls */
.accessibility-controls {
    position: fixed;
    bottom: 100px;
    right: 30px;
    z-index: 1000;
}

.accessibility-toggle {
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
}

.accessibility-toggle:hover {
    background: var(--primary-dark);
    transform: scale(1.1);
}

.accessibility-toggle:focus {
    outline: 3px solid white;
    outline-offset: 3px;
}

.accessibility-menu {
    position: absolute;
    bottom: 70px;
    right: 0;
    background: white;
    border-radius: 15px;
    box-shadow: var(--shadow-lg);
    padding: 1rem;
    min-width: 200px;
    display: none;
    flex-direction: column;
    gap: 0.5rem;
}

.accessibility-menu.active {
    display: flex;
}

.accessibility-option {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    background: var(--bg-light);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    text-align: left;
    transition: var(--transition);
    color: var(--text-dark);
}

.accessibility-option:hover {
    background: var(--primary-color);
    color: white;
}

.accessibility-option:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.accessibility-option i {
    width: 20px;
    text-align: center;
}

/* ============================================
   Responsive Styles for About Us, Terms & Privacy Pages
   ============================================ */

/* About Us Page Responsive */
@media (max-width: 768px) {
    /* Our Story Section - Two Column to Single */
    main section[style*="padding: 80px 0"] {
        padding: 50px 0 !important;
    }
    
    /* Grid layouts to single column - target divs with grid */
    main section > div > div[style*="display: grid"] {
        display: grid !important;
        grid-template-columns: 1fr !important;
        gap: 30px !important;
    }
    
    /* Mission & Vision section */
    main section[style*="background: var(--bg-light)"] > div > div[style*="display: grid"] {
        grid-template-columns: 1fr !important;
        gap: 30px !important;
    }
    
    /* Core Values grid */
    main section > div > div[style*="grid-template-columns: repeat(auto-fit, minmax(250px, 1fr))"] {
        grid-template-columns: 1fr !important;
    }
    
    /* Statistics section */
    main section[style*="background: linear-gradient"] > div > div[style*="display: grid"] {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 20px !important;
    }
    
    /* What We Offer grid */
    main section > div > div[style*="grid-template-columns: repeat(auto-fit, minmax(280px, 1fr))"] {
        grid-template-columns: 1fr !important;
    }
    
    /* Why Choose Us grid */
    main section > div > div[style*="max-width: 1000px"] > div[style*="display: grid"] {
        grid-template-columns: 1fr !important;
    }
    
    /* Call to Action buttons */
    main section[style*="background: linear-gradient(135deg, var(--primary-color)"] > div > div[style*="display: flex"] {
        flex-direction: column !important;
        align-items: center !important;
    }
    
    main section[style*="background: linear-gradient(135deg, var(--primary-color)"] > div > div[style*="display: flex"] > a {
        width: 100% !important;
        max-width: 300px;
    }
    
    /* Section headers */
    .section-header {
        margin-bottom: 40px !important;
    }
    
    .section-title {
        font-size: 2rem !important;
    }
    
    .section-subtitle {
        font-size: 1rem !important;
    }
    
    /* Reduce padding in cards */
    main section div[style*="padding: 50px"],
    main section div[style*="padding: 40px"],
    main section div[style*="padding: 35px"] {
        padding: 30px 20px !important;
    }
    
    /* Our Story two column layout */
    main section > div > div[style*="max-width: 1000px"] > div[style*="display: grid; grid-template-columns: 1fr 1fr"] {
        grid-template-columns: 1fr !important;
        gap: 30px !important;
    }
}

@media (max-width: 480px) {
    /* About Us Hero */
    main section[style*="background: linear-gradient(135deg, var(--primary-color)"] h1 {
        font-size: 2rem !important;
    }
    
    main section[style*="background: linear-gradient(135deg, var(--primary-color)"] p {
        font-size: 0.9rem !important;
    }
    
    /* Statistics - single column on very small screens */
    main section[style*="background: linear-gradient"] > div > div[style*="display: grid"] {
        grid-template-columns: 1fr !important;
    }
    
    /* Section padding further reduction */
    main section[style*="padding: 80px 0"],
    main section[style*="padding: 60px 0"] {
        padding: 40px 0 !important;
    }
    
    /* Content max-width adjustment */
    main section div[style*="max-width: 1000px"],
    main section div[style*="max-width: 900px"],
    main section div[style*="max-width: 1200px"] {
        max-width: 100% !important;
        padding: 0 15px !important;
    }
    
    /* Cards padding reduction */
    main section div[style*="padding: 50px"],
    main section div[style*="padding: 40px"],
    main section div[style*="padding: 35px"] {
        padding: 25px 15px !important;
    }
    
    /* Icon sizes */
    main section i[style*="font-size: 4rem"] {
        font-size: 2.5rem !important;
    }
    
    main section i[style*="font-size: 3rem"] {
        font-size: 2rem !important;
    }
    
    main section i[style*="font-size: 2.5rem"] {
        font-size: 1.75rem !important;
    }
    
    /* Heading sizes */
    main section h2[style*="font-size: 2rem"],
    main section h2[style*="font-size: 1.75rem"] {
        font-size: 1.5rem !important;
    }
    
    main section h3[style*="font-size: 1.25rem"] {
        font-size: 1.1rem !important;
    }
    
    /* Text sizes */
    main section p[style*="font-size: 1.1rem"],
    main section p[style*="font-size: 1.2rem"],
    main section p[style*="font-size: 1.05rem"] {
        font-size: 1rem !important;
    }
    
    /* Call to Action heading */
    main section h2[style*="font-size: 2.5rem"] {
        font-size: 1.75rem !important;
    }
    
    /* Statistics numbers */
    main section div[style*="font-size: 3.5rem"] {
        font-size: 2rem !important;
    }
}

/* Terms & Conditions and Privacy Policy Pages Responsive */
@media (max-width: 768px) {
    /* Content container */
    main .terms-content,
    main .privacy-content {
        max-width: 100% !important;
        padding: 0 15px !important;
    }
    
    /* Section padding */
    main section[style*="padding: 60px 0"] {
        padding: 40px 0 !important;
    }
    
    /* Section headers */
    main .section-header[style*="text-align: center"] {
        margin-bottom: 30px !important;
    }
    
    /* Headings */
    main h1.section-title {
        font-size: 2rem !important;
    }
    
    main h2[style*="font-size: 1.75rem"] {
        font-size: 1.5rem !important;
        margin-bottom: 15px !important;
    }
    
    main h3[style*="font-size: 1.25rem"] {
        font-size: 1.1rem !important;
        margin-top: 15px !important;
        margin-bottom: 10px !important;
    }
    
    /* Paragraphs and lists */
    main p[style*="margin-bottom: 15px"] {
        margin-bottom: 12px !important;
        font-size: 0.95rem !important;
    }
    
    main ul[style*="margin-left: 30px"] {
        margin-left: 20px !important;
        margin-bottom: 12px !important;
    }
    
    /* Contact info box */
    main div[style*="background: var(--bg-light); padding: 20px"] {
        padding: 15px !important;
    }
    
    /* Back to Home button */
    main div[style*="text-align: center; margin-top: 50px"] {
        margin-top: 30px !important;
    }
    
    main div[style*="text-align: center; margin-top: 50px"] > a {
        width: 100% !important;
        max-width: 300px;
    }
}

@media (max-width: 480px) {
    /* Further reduction for very small screens */
    main section[style*="padding: 60px 0"] {
        padding: 30px 0 !important;
    }
    
    main h1.section-title {
        font-size: 1.75rem !important;
    }
    
    main h2[style*="font-size: 1.75rem"] {
        font-size: 1.3rem !important;
    }
    
    main h3[style*="font-size: 1.25rem"] {
        font-size: 1rem !important;
    }
    
    main p[style*="margin-bottom: 15px"] {
        font-size: 0.9rem !important;
        line-height: 1.6 !important;
    }
    
    main ul[style*="margin-left: 30px"] {
        margin-left: 15px !important;
        font-size: 0.9rem !important;
    }
    
    /* Contact info box */
    main div[style*="background: var(--bg-light); padding: 20px"] {
        padding: 12px !important;
    }
    
    main div[style*="background: var(--bg-light); padding: 20px"] > p {
        font-size: 0.85rem !important;
        margin-bottom: 8px !important;
    }
    
    /* Terms sections */
    main .terms-section,
    main .privacy-section {
        margin-bottom: 30px !important;
    }
}