/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #374151;
    background-color: #ffffff;
}

.container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Button Blur Effect */
.button-blur {
    transition: all 0.2s ease;
}

.button-blur:active {
    filter: blur(0.5px);
    transform: scale(0.98);
}

/* Header Styles */
.header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid #e5e7eb;
}

.header .container {
    height: 4.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    text-decoration: none;
    color: inherit;
}

.logo-icon {
    height: 4rem;
    width: 10rem;
}

/* Mobile Toggle */
.mobile-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    gap: 0.25rem;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-toggle span {
    width: 1.5rem;
    height: 0.125rem;
    background-color: currentColor;
    transition: all 0.3s ease;
}

/* Desktop Navigation */
.desktop-nav {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    font-size: 1rem;
    font-weight: 600;
}

.nav-link {
    text-decoration: none;
    color: inherit;
    transition: all 0.2s ease;
}

.nav-link:hover {
    text-decoration: underline;
    text-underline-offset: 4px;
}

/* Dropdown Styles */
.dropdown {
    position: relative;
}

.dropdown-btn {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    background: none;
    border: none;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    color: inherit;
    transition: all 0.2s ease;
}

.dropdown-btn:hover {
    text-decoration: underline;
    text-underline-offset: 4px;
}

.dropdown-icon {
    width: 1rem;
    height: 1rem;
    transition: transform 0.2s ease;
}

.dropdown:hover .dropdown-icon {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    margin-top: 0.5rem;
    width: 12rem;
    background: white;
    border: 1px solid #e5e7eb;
    border-radius: 0.5rem;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
}

.dropdown-content {
    padding: 0.5rem 0;
}

.dropdown-item {
    display: block;
    padding: 0.5rem 1rem;
    font-size: 1rem;
    text-decoration: none;
    color: inherit;
    transition: background-color 0.2s ease;
}

.dropdown-item:hover {
    background-color: #f9fafb;
}

/* Mega Menu */
.mega-dropdown .mega-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    margin-top: 0.5rem;
    width: 25rem;
    background: white;
    border: 1px solid #e5e7eb;
    border-radius: 0.5rem;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease;
}

.mega-dropdown:hover .mega-menu {
    opacity: 1;
    visibility: visible;
}

.mega-content {
    padding: 1rem;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.mega-title {
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: 0.5rem;
    color: #FF6201;
}

.mega-links {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.mega-link {
    display: block;
    font-size: 1rem;
    text-decoration: none;
    color: inherit;
    transition: color 0.2s ease;
}

.mega-link:hover {
    color: #ea580c;
}

/* Mobile Navigation */
.mobile-nav {
    position: fixed;
    top: 4rem;
    left: 0;
    right: 0;
    background: white;
    border-bottom: 1px solid #e5e7eb;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 40;
}

.mobile-nav.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
}

.mobile-nav-content {
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.mobile-nav-link {
    display: block;
    padding: 0.5rem 0;
    text-decoration: none;
    color: inherit;
    transition: color 0.2s ease;
}

.mobile-nav-link:hover {
    color: #ea580c;
}

.mobile-dropdown-btn {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 0.5rem 0;
    background: none;
    border: none;
    font-size: 1rem;
    cursor: pointer;
    color: inherit;
    transition: color 0.2s ease;
}

.mobile-dropdown-btn:hover {
    color: #ea580c;
}

.mobile-dropdown-icon {
    width: 1rem;
    height: 1rem;
}

.mobile-dropdown-content {
    padding-left: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.mobile-dropdown-content.hidden {
    display: none;
}

.mobile-dropdown-item {
    display: block;
    padding: 0.25rem 0;
    font-size: 0.875rem;
    text-decoration: none;
    color: #6b7280;
}

.mobile-mega-section {
    margin-bottom: 0.75rem;
}

.mobile-mega-title {
    font-weight: 500;
    font-size: 0.875rem;
    margin-bottom: 0.25rem;
    color: #FF6201;
}

.mobile-mega-links {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.mobile-mega-link {
    display: block;
    padding: 0.25rem 0;
    font-size: 0.875rem;
    text-decoration: none;
    color: #6b7280;
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.explore-btn {
    display: inline-flex;
    align-items: center;
    height: 2.5rem;
    border-radius: 0.375rem;
    padding: 0 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: white;
    background-color: #FF6201;
    text-decoration: none;
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    transition: all 0.2s ease;
}

/* Marquee Section */
.marquee-section {
    background: linear-gradient(to right, #fff7ed, #fef3c7);
    border-bottom: 1px solid #e5e7eb;
    overflow: hidden;
}

.marquee-container {
    padding: 0.75rem 0;
}

.desktop-marquee {
    display: flex;
    white-space: nowrap;
}

.marquee-content {
    display: flex;
    align-items: center;
    gap: 2rem;
    animation: marquee 60s linear infinite;
}

.marquee-content:hover {
    animation-play-state: paused;
}

@keyframes marquee {
    0% { transform: translateX(0%); }
    100% { transform: translateX(-50%); }
}

.mobile-marquee {
    display: none;
}

.mobile-marquee-content {
    display: flex;
    overflow-x: auto;
    gap: 1rem;
    padding: 0.25rem 1rem;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.mobile-marquee-content::-webkit-scrollbar {
    display: none;
}

.marquee-item {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 1rem;
    font-weight: 500;
    background-color: rgba(255, 255, 255, 0.7);
    color: #374151;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
    flex-shrink: 0;
}

.marquee-item:hover {
    background-color: #fed7aa;
    color: #c2410c;
}

.marquee-dot {
    width: 0.5rem;
    height: 0.5rem;
    background-color: #fb923c;
    border-radius: 50%;
    margin-right: 0.5rem;
}

/* Hero Section */
.hero {
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, #F3B700 0%, #FAA300 25%, #E57C04 50%, #FF6201 75%, #F63E02 100%);
    opacity: 0.12;
}

.hero-container {
    position: relative;
    padding: 2rem 1rem 4rem;
}

.hero-content {
    display: grid;
    gap: 1.5rem;
    align-items: center;
}

.hero-text {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    border-radius: 9999px;
    padding: 0.25rem 0.75rem;
    font-size: 0.85rem;
    font-weight: 500;
    background-color: #FFF3E6;
    color: #E05700;
    width: fit-content;
}

.badge-dot {
    height: 0.25rem;
    width: 0.25rem;
    border-radius: 50%;
    background-color: #E57C04;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.025em;
}

.hero-description {
    color: #6b7280;
    max-width: 36rem;
    font-size: 1.125rem;
}

.hero-buttons {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    height: 2.75rem;
    border-radius: 0.375rem;
    padding: 0 1.25rem;
    font-size: 1rem;
    font-weight: 600;
    color: white;
    background-color: #FF6201;
    text-decoration: none;
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    transition: all 0.2s ease;
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    height: 2.75rem;
    border-radius: 0.375rem;
    padding: 0 1.25rem;
    font-size: 1rem;
    font-weight: 600;
    color: #F63E02;
    border: 1px solid #FF6201;
    background-color: transparent;
    text-decoration: none;
    transition: all 0.2s ease;
}

.btn-icon {
    width: 1rem;
    height: 1rem;
}

.hero-features {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding-top: 0.5rem;
    font-size: 0.9rem;
    color: #6b7280;
}

.hero-feature {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.feature-icon {
    height: 1rem;
    width: 1rem;
}

.hero-image {
    position: relative;
}

.main-image {
    width: 100%;
    height: 17.5rem;
    object-fit: cover;
    border-radius: 1rem;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.floating-logo {
    position: absolute;
    height: 3.5rem;
    width: 3.5rem;
    background: white;
    border-radius: 0.75rem;
    padding: 0.75rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.floating-logo.top-right {
    top: -1.5rem;
    right: -1.5rem;
}

.floating-logo.bottom-left {
    bottom: -1.5rem;
    left: -1.5rem;
}

.wave-decoration {
    width: 100%;
    object-fit: cover;
    margin-bottom: -1px;
}

/* Section Styles */
section {
    scroll-margin-top: 6rem;
}

.section-header {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
}

.section-header-content {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    
}

.section-eyebrow {
    display: inline-flex;
    align-items: center;
    border-radius: 9999px;
    padding: 0.25rem 0.75rem;
    font-size: 0.875rem;
    font-weight: 500;
    background-color: #FFF3E6;
    color: #E05700;
    width: fit-content;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.025em;
}

.section-subtitle {
    font-size: 1rem;
    color: #6b7280;
    line-height: 1.5;
}

.section-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 2.5rem;
    border-radius: 0.375rem;
    padding: 0 1rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: white;
    background-color: #F63E02;
    text-decoration: none;
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    transition: all 0.2s ease;
    width: fit-content;
}

/* Courses Section */
.courses-section {
    padding: 3rem 0 4rem;
}

.courses-filters {
    display: grid;
    gap: 1rem;
    align-items: center;
    margin-bottom: 1.5rem;
}

.search-container {
    position: relative;
}

.search-icon {
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    height: 1rem;
    width: 1rem;
    color: #6b7280;
}

.search-input {
    width: 100%;
    padding: 0.5rem 0.75rem 0.5rem 2.25rem;
    border: 1px solid #d1d5db;
    border-radius: 0.375rem;
    font-size: 0.875rem;
    transition: all 0.2s ease;
}

.search-input:focus {
    outline: none;
    border-color: #FF6201;
    box-shadow: 0 0 0 3px rgba(255, 98, 1, 0.1);
}

.category-filters {
    display: flex;
    gap: 0.5rem;
    overflow-x: auto;
    padding: 0.25rem 0;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.category-filters::-webkit-scrollbar {
    display: none;
}

.category-filter {
    font-size: 0.9rem;
    border-radius: 9999px;
    padding: 0.25rem 0.75rem;
    border: 1px solid #e5e7eb;
    background: transparent;
    white-space: nowrap;
    cursor: pointer;
    transition: all 0.2s ease;
}

.category-filter.active {
    color: white;
    background-color: #FF6201;
    border-color: #FF6201;
}

.courses-grid {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

.course-card {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: white;
    border: 1px solid #e5e7eb;
    border-radius: 0.75rem;
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    transition: all 0.2s ease;
}

.course-card:hover {
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.course-image-container {
    position: relative;
}

.course-image {
    width: 100%;
    height: 12rem;
    object-fit: cover;
}

.course-badge {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background: rgba(255, 255, 255, 0.9);
    color: black;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.85rem;
    font-weight: 500;
}

.course-header {
    padding: 1rem 1rem 0.25rem;
}

.course-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.course-meta {
    font-size: 0.95rem;
    color: #6b7280;
}

.course-content {
    padding: 0 1rem;
    font-size: 0.875rem;
    color: #6b7280;
    flex-grow: 1;
}

.course-footer {
    padding: 1rem;
    margin-top: auto;
}

.course-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 90%;
    padding: 0.5rem 1rem;
    background-color: #FF6201;
    color: white;
    text-decoration: none;
    border-radius: 0.375rem;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.course-btn:hover {
    background-color: #ea580c;
}

.course-btn-icon {
    width: 1rem;
    height: 1rem;
}

.courses-tip {
    margin-top: 2rem;
    font-size: 0.75rem;
    color: #6b7280;
}

/* Universities Section */
.universities-section {
    padding: 4rem 0 5rem;
}

.universities-eyebrow {
    background-color: #FFF3E6;
    color: #E05700;
}

.universities-cta {
    background-color: #E57C04;
    font-size: 1rem;
}

.universities-grid {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
}

.university-card {
    padding: 1rem;
    background: white;
    border: 1px solid #e5e7eb;
    border-radius: 0.5rem;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
}

.university-header {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.university-logo {
    height: 3rem;
    width: 3rem;
    object-fit: contain;
    border-radius: 0.375rem;
    background: white;
}

.university-info {
    flex: 1;
}

.university-name {
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.accordion {
    margin-top: 0.5rem;
}

.accordion-item {
    border-bottom: 1px solid #e5e7eb;
}

.accordion-item:last-child {
    border-bottom: none;
}

.accordion-trigger {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 0.75rem 0;
    background: none;
    border: none;
    font-size: 1rem;
    text-align: left;
    cursor: pointer;
    transition: all 0.2s ease;
}

.accordion-trigger:hover {
    color: #FF6201;
}

.accordion-icon {
    width: 1rem;
    height: 1rem;
    transition: transform 0.2s ease;
}

.accordion-item.active .accordion-icon {
    transform: rotate(180deg);
}

.accordion-content {
    padding-bottom: 0.75rem;
    display: none;
}

.accordion-item.active .accordion-content {
    display: block;
}

.syllabus-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.syllabus-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 0.75rem;
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: 0.375rem;
    transition: all 0.2s ease;
}

.syllabus-btn-primary {
    background-color: #FF6201;
    color: white;
}

.syllabus-btn-primary:hover {
    background-color: #ea580c;
}

.syllabus-btn-secondary {
    border: 1px solid #FF6201;
    color: #F63E02;
    background: transparent;
}

.syllabus-btn-secondary:hover {
    background-color: #fff7ed;
}

.syllabus-btn-icon {
    width: 1rem;
    height: 1rem;
}

.universities-note {
    margin-top: 1.5rem;
    font-size: 0.75rem;
    color: #6b7280;
}

/* University Courses Section */
.university-courses-section {
    padding: 4rem 0 5rem;
    background-color: #f9fafb;
}

.university-courses-eyebrow {
    background-color: #FFF3E6;
    color: #E05700;
    
}

.university-courses-cta {
    background-color: #E57C04;
    font-size: 1rem;
}

.university-courses-grid {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

.university-courses-note {
    margin-top: 1.5rem;
    font-size: 0.875rem;
    color: #6b7280;
}

/* Books Section */
.books-section {
    padding: 4rem 0 5rem;
}

.books-eyebrow {
    background-color: #FFF3E6;
    color: #E05700;
}

.books-cta {
    background-color: #F3B700;
    font-size: 1rem;
}

.books-grid {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
}

.book-card {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: white;
    border: 1px solid #e5e7eb;
    border-radius: 0.5rem;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    transition: all 0.2s ease;
}

.book-card:hover {
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.book-cover-container {
    aspect-ratio: 3/4;
    background-color: rgba(156, 163, 175, 0.3);
}

.book-cover {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.book-header {
    padding: 1rem 1rem 0.25rem;
}

.book-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.book-author {
    font-size: 0.875rem;
    color: #6b7280;
    font-weight: 600;
}

.book-content {
    padding: 0 1rem;
    font-size: 0.875rem;
    color: #6b7280;
    flex-grow: 1;
}

.book-footer {
    padding: 1rem;
    margin-top: auto;
}

.book-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 90%;
    padding: 0.5rem 1rem;
    background-color: #FAA300;
    color: white;
    text-decoration: none;
    border-radius: 0.375rem;
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.book-btn:hover {
    background-color: #f59e0b;
}

.book-btn-icon {
    width: 1rem;
    height: 1rem;
}

/* Footer */
.footer {
    background-color: #0f172a;
    color: #cbd5e1;
}

.footer .container {
    padding: 3rem 1rem;
}

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

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.footer-logo-icon {
    height: 4rem;
    width: 10rem;
}

.footer-logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
}

.footer-description {
    color: #94a3b8;
    line-height: 1.6;
    max-width: 28rem;
}

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

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    background-color: #1e293b;
    border-radius: 50%;
    color: #cbd5e1;
    text-decoration: none;
    transition: all 0.2s ease;
}

.social-link:hover {
    background-color: #ea580c;
}

.social-link svg {
    width: 1.25rem;
    height: 1.25rem;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.footer-column {
    display: flex;
    flex-direction: column;
}

.footer-column-title {
    color: white;
    font-weight: 600;
    margin-bottom: 1rem;
}

.footer-column-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-link {
    color: #cbd5e1;
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-link:hover {
    color: #fb923c;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.email-item {
    align-items: flex-start;
}

.contact-icon {
    width: 1rem;
    height: 1rem;
    color: #fb923c;
    flex-shrink: 0;
}

.email-item .contact-icon {
    margin-top: 0.125rem;
}

.email-link {
    word-break: break-all;
    font-size: 0.875rem;
}

/* .footer-text {
    color: #94a3b8;
} */

.footer-bottom {
    border-top: 1px solid #1e293b;
    margin-top: 3rem;
    padding-top: 2rem;
}

.footer-bottom-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.footer-copyright {
    color: #94a3b8;
    font-size: 0.875rem;
}

.footer-bottom-links {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    font-size: 0.875rem;
}

.footer-bottom-link {
    color: #94a3b8;
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-bottom-link:hover {
    color: #fb923c;
}

.back-to-top {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    width: 3rem;
    height: 3rem;
    background-color: #ea580c;
    color: white;
    border: none;
    border-radius: 50%;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 50;
    transition: all 0.2s ease;
}

.back-to-top:hover {
    background-color: #c2410c;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.back-to-top svg {
    width: 1.25rem;
    height: 1.25rem;
}

/* Utility Classes */
.hidden {
    display: none;
}

.hidden-mobile {
    display: none;
}

/* Responsive Design */
@media (min-width: 640px) {
    .hero-title {
        font-size: 3rem;
    }

    .hero-description {
        font-size: 1.125rem;
    }

    .hero-buttons {
        flex-direction: row;
    }

    .section-title {
        font-size: 1.875rem;
    }

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

    .courses-filters {
        grid-template-columns: 1fr auto;
    }

    .category-filters {
        padding: 0.25rem 0;
    }

    .category-filter {
        font-size: 0.875rem;
    }

    .hidden-mobile {
        display: flex;
    }

    .main-image {
        height: 22.5rem;
    }

    .floating-logo {
        height: 4rem;
        width: 4rem;
    }

    .footer-bottom-content {
        flex-direction: row;
    }
}

@media (min-width: 768px) {
    .mobile-toggle {
        display: none;
    }

    .desktop-nav {
        display: flex;
    }

    .mobile-nav {
        display: none;
    }

    .mobile-marquee {
        display: none;
    }

    .desktop-marquee {
        display: flex;
    }

    .hero-container {
        padding: 6rem 1rem 7rem;
    }

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

    .footer-content {
        grid-template-columns: 2fr 3fr;
    }

    .footer-links {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (min-width: 1024px) {
    .hero-container {
        padding: 7rem 1rem 7rem;
    }

    .main-image {
        height: 26.25rem;
    }

    .courses-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .universities-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .books-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 767px) {
    .mobile-toggle {
        display: flex;
    }

    .desktop-nav {
        display: none;
    }

    .mobile-marquee {
        display: block;
    }

    .desktop-marquee {
        display: none;
    }

    .section-header {
        flex-direction: column;
        align-items: flex-start;
    }
}