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

:root {
    /* White & Mint Green EdTech palette */
    --primary-mint: #4FD1C5;
    --primary-mint-dark: #38B2AC;
    --bg-mint-light: #E6FFFA;
    --text-main: #1A365D;
    --white: #FFFFFF;
    --accent-mint: #81E6D9;

    --primary-color: var(--primary-mint);
    --primary-light: var(--accent-mint);
    --primary-dark: var(--primary-mint-dark);
    --secondary-color: var(--primary-mint);
    --success-color: var(--primary-mint);
    --danger-color: #E53E3E;
    --warning-color: var(--primary-mint-dark);

    --bg-darkest: var(--white);
    --bg-dark: var(--bg-mint-light);
    --bg-card: var(--white);
    --bg-light: #F0FFFF;
    --bg-lighter: var(--bg-mint-light);

    --text-primary: var(--text-main);
    --text-secondary: #2D3748;
    --text-tertiary: #4A5568;
    --text-light: #718096;

    --border-color: rgba(26, 54, 93, 0.12);
    --border-light: rgba(26, 54, 93, 0.06);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-secondary);
    background-color: var(--white);
}

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

/* Navigation Bar */
.navbar {
    background-color: var(--white);
    box-shadow: 0 2px 8px rgba(26, 54, 93, 0.08);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
}

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

.logo {
    display: flex;
    align-items: center;
    height: 50px;
    flex-shrink: 0;
}

.logo img {
    height: 100%;
    max-height: 50px;
    width: auto;
    object-fit: contain;
    display: block;
}

/* Search Bar */
.search-container {
    display: flex;
    align-items: center;
    background: var(--bg-mint-light);
    border: 1px solid var(--accent-mint);
    border-radius: 20px;
    padding: 0 10px;
    margin: 0 1rem;
    flex-grow: 1;
    max-width: 400px; /* Limit width */
}

.search-container input {
    background: transparent;
    border: none;
    color: var(--text-main);
    padding: 8px 10px;
    outline: none;
    flex-grow: 1;
    font-size: 0.9rem;
}

.search-container input::placeholder {
    color: var(--text-tertiary);
}

.search-container button {
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    padding: 5px;
    color: var(--primary-mint);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    transition: color 0.3s ease;
    font-weight: 500;
}

.nav-links a:hover {
    color: var(--primary-mint-dark);
    padding: 8px 16px;
    border-radius: 20px;
    background-color: var(--bg-mint-light);
    transition: all 0.3s ease;
}

.hamburger {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--primary-mint) !important;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-mint) 0%, var(--primary-mint-dark) 100%);
    color: var(--white);
    padding: 100px 20px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 20% 80%, rgba(255,255,255,0.08) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(255,255,255,0.06) 0%, transparent 40%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-content.hero-animate .hero-title {
    animation: heroTitleIn 0.8s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.hero-content.hero-animate .hero-subtitle {
    opacity: 0;
    animation: heroSubtitleIn 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.25s forwards;
}

.hero-content.hero-animate .hero-cta {
    opacity: 0;
    animation: heroCtaIn 0.6s cubic-bezier(0.22, 1, 0.36, 1) 0.5s forwards;
}

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

@keyframes heroSubtitleIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 0.95;
        transform: translateY(0);
    }
}

@keyframes heroCtaIn {
    from {
        opacity: 0;
        transform: translateY(15px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.hero-content h1,
.hero-content .hero-title {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--white);
}

.hero-content p,
.hero-content .hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    opacity: 0.95;
    color: var(--white);
}

/* Buttons */
.btn {
    padding: 12px 30px;
    border: none;
    border-radius: 5px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
}

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

.btn-primary:hover {
    background-color: var(--primary-mint-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(79, 209, 197, 0.35);
}

/* Categories Section */
.categories-section {
    padding: 80px 0;
    background-color: var(--bg-dark);
}

.categories-section h2 {
    text-align: center;
    margin-bottom: 3rem;
    font-size: 2.2rem;
    color: var(--text-main);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 2rem;
}

.category-card {
    background-color: var(--white);
    padding: 2rem;
    border-radius: 8px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid var(--border-color);
    box-shadow: 0 2px 8px rgba(26, 54, 93, 0.06);
}

.category-card:hover {
    border-color: var(--primary-mint);
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(79, 209, 197, 0.2);
    background-color: var(--bg-mint-light);
}

.category-card h3 {
    margin-top: 1rem;
    color: var(--text-main);
}

/* Courses Section */
.courses-section {
    padding: 80px 0;
    background-color: var(--white);
}

.courses-section h2 {
    text-align: center;
    margin-bottom: 2rem;
    font-size: 2.2rem;
    color: var(--text-main);
}

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

.filter-btn {
    padding: 8px 20px;
    border: 2px solid var(--accent-mint);
    background-color: transparent;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
    color: var(--text-secondary);
}

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

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
}

.course-card {
    background-color: var(--white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(26, 54, 93, 0.08);
    transition: all 0.3s ease;
    cursor: pointer;
    border: 1px solid var(--border-color);
}

.course-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 24px rgba(79, 209, 197, 0.2);
    border-color: var(--accent-mint);
    background-color: var(--bg-mint-light);
}

.course-image {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, var(--primary-mint) 0%, var(--primary-mint-dark) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.2rem;
    font-weight: bold;
}

.course-content {
    padding: 1.5rem;
}

.course-badge {
    display: inline-block;
    background-color: var(--bg-mint-light);
    color: var(--primary-mint-dark);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    margin-bottom: 0.5rem;
    border: 1px solid var(--accent-mint);
}

.course-card h3 {
    margin: 0.5rem 0;
    font-size: 1.2rem;
    color: var(--text-main);
}

.course-info {
    color: var(--text-tertiary);
    font-size: 0.9rem;
    margin: 0.5rem 0;
}

.course-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    flex-wrap: wrap;
    gap: 0.75rem;
}

.course-price {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-mint-dark);
}

.course-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-shrink: 0;
}

.course-btn {
    background-color: var(--primary-mint);
    color: var(--white);
    border: none;
    padding: 8px 16px;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
    font-size: 0.9rem;
}

.course-btn:hover {
    background-color: var(--primary-mint-dark);
    transform: scale(1.02);
}

.course-btn-cart {
    background-color: transparent;
    color: var(--primary-mint-dark);
    border: 2px solid var(--primary-mint);
}

.course-btn-cart:hover {
    background-color: var(--bg-mint-light);
    color: var(--primary-mint-dark);
    border-color: var(--primary-mint-dark);
}

/* About Section */
.about-section {
    padding: 80px 0;
    background-color: var(--bg-mint-light);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.about-section h2,
.about-title {
    font-size: 2.2rem;
    margin-bottom: 1.5rem;
    color: var(--text-main);
}

.about-text.animate-on-scroll {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

.about-text.animate-on-scroll.animate-in {
    opacity: 1;
    transform: translateY(0);
}

.about-text.animate-in .about-title {
    animation: aboutTitleIn 0.5s cubic-bezier(0.22, 1, 0.36, 1) 0.15s both;
}

@keyframes aboutTitleIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.about-list-item {
    padding: 0.8rem 0;
    font-size: 1.1rem;
    color: var(--text-secondary);
    opacity: 0;
    transform: translateX(-20px);
    transition: opacity 0.5s ease, transform 0.5s ease, color 0.2s ease;
    transition-delay: calc(0.1s + var(--i, 0) * 0.08s);
}

.about-text.animate-in .about-list-item {
    opacity: 1;
    transform: translateX(0);
}

.about-list-item:hover {
    color: var(--primary-mint-dark);
    padding-left: 8px;
}

.about-list {
    list-style: none;
}

.about-list li {
    padding: 0.8rem 0;
    font-size: 1.1rem;
    color: var(--text-secondary);
}

.about-stats {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 2rem;
}

.stat {
    text-align: center;
    padding: 2rem;
    background-color: var(--white);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    box-shadow: 0 2px 8px rgba(26, 54, 93, 0.06);
    opacity: 0;
    transform: translateY(30px) scale(0.95);
    transition: opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1), transform 0.6s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.3s ease, border-color 0.3s ease;
    transition-delay: calc(0.15s + var(--i, 0) * 0.12s);
}

.stat.animate-in {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.stat:hover {
    box-shadow: 0 12px 28px rgba(79, 209, 197, 0.25);
    border-color: var(--accent-mint);
}

.stat-number {
    font-size: 2.5rem;
    color: var(--primary-mint-dark);
    margin-bottom: 0.5rem;
    display: inline-block;
    transition: transform 0.3s ease;
}

.stat:hover .stat-number {
    transform: scale(1.08);
}

.stat h3 {
    font-size: 2.5rem;
    color: var(--primary-mint-dark);
    margin-bottom: 0.5rem;
}

.stat p {
    color: var(--text-tertiary);
}

/* Newsletter Section */
.newsletter-section {
    background: linear-gradient(135deg, var(--primary-mint) 0%, var(--primary-mint-dark) 100%);
    color: var(--white);
    padding: 60px 20px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.newsletter-inner {
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1), transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}

.newsletter-inner.animate-in {
    opacity: 1;
    transform: translateY(0);
}

.newsletter-inner.animate-in .newsletter-form {
    animation: newsletterFormIn 0.6s cubic-bezier(0.22, 1, 0.36, 1) 0.3s both;
}

@keyframes newsletterFormIn {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.newsletter-form {
    display: flex;
    gap: 1rem;
    max-width: 500px;
    margin: 0 auto;
    flex-wrap: wrap;
    justify-content: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.newsletter-form:focus-within {
    transform: scale(1.02);
}

.newsletter-section h2 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: var(--white);
}

.newsletter-section p {
    margin-bottom: 2rem;
    opacity: 0.95;
    color: var(--white);
}

.newsletter-form input {
    flex: 1;
    min-width: 200px;
    padding: 12px 20px;
    border: none;
    border-radius: 5px;
    font-size: 1rem;
    background-color: var(--white);
    color: var(--text-main);
    transition: box-shadow 0.3s ease;
}

.newsletter-form input:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(255,255,255,0.4);
}

/* Footer */
.footer {
    background-color: var(--white);
    color: var(--text-secondary);
    padding: 60px 0 20px;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 4rem;
    margin-bottom: 2rem;
}

.footer-section {
    opacity: 0;
    transform: translateY(25px);
    transition: opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1), transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
    transition-delay: calc(0.1s + var(--i, 0) * 0.1s);
}

.footer-section.animate-in {
    opacity: 1;
    transform: translateY(0);
}

.footer-section h3 {
    margin-bottom: 1rem;
    color: var(--text-main);
    transition: color 0.2s ease;
}

.footer-section:hover h3 {
    color: var(--primary-mint-dark);
}

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

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: var(--text-tertiary);
    text-decoration: none;
    transition: color 0.3s ease, padding-left 0.2s ease;
}

.footer-section a:hover {
    color: var(--primary-mint);
    padding-left: 4px;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-tertiary);
    opacity: 0;
    transform: translateY(15px);
    transition: opacity 0.6s ease 0.4s, transform 0.6s ease 0.4s;
}

.footer-bottom.animate-in {
    opacity: 1;
    transform: translateY(0);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background-color: var(--white);
    margin: 5% auto;
    padding: 2rem;
    border-radius: 8px;
    width: 90%;
    max-width: 500px;
    animation: slideIn 0.3s ease;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    box-shadow: 0 12px 40px rgba(26, 54, 93, 0.15);
}

@keyframes slideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.close {
    color: var(--text-tertiary);
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.close:hover {
    color: var(--primary-mint);
}

.modal-details {
    margin: 1.5rem 0;
    padding: 1rem 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.modal-details p {
    margin: 0.5rem 0;
    color: var(--text-secondary);
}

#enrollBtn {
    width: 100%;
    margin-top: 1rem;
}

/* Toast notification (add to cart, etc.) */
.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(80px);
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 20px;
    border-radius: 10px;
    font-weight: 500;
    font-size: 0.95rem;
    box-shadow: 0 10px 40px rgba(26, 54, 93, 0.2);
    z-index: 9999;
    opacity: 0;
    transition: transform 0.3s ease, opacity 0.3s ease;
    pointer-events: none;
    max-width: calc(100vw - 32px);
}

.toast.toast-show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.toast-success {
    background: var(--primary-mint);
    color: var(--white);
    border: 1px solid var(--primary-mint-dark);
}

.toast-info {
    background: var(--white);
    color: var(--text-main);
    border: 1px solid var(--accent-mint);
}

.toast-icon {
    font-size: 1.2rem;
    flex-shrink: 0;
}

.toast-message {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

@media (max-width: 480px) {
    .toast {
        bottom: 16px;
        padding: 12px 16px;
        font-size: 0.9rem;
    }
    .toast-message {
        white-space: normal;
        max-width: 260px;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .logo {
        height: 44px;
    }
    .logo img {
        max-height: 44px;
    }
    
    .search-container {
        margin: 0 5px;
        order: 1; /* Move to center */
        padding: 0 5px;
    }
    
    .search-container input {
        width: 100px; /* Smaller input */
        font-size: 0.8rem;
    }

    .hamburger {
        display: block;
        order: 2; /* Move to right */
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--white) !important;
        flex-direction: column;
        gap: 0;
        box-shadow: 0 4px 12px rgba(26, 54, 93, 0.12);
        padding-bottom: 1rem;
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links li {
        padding: 1rem 2rem;
        border-bottom: 1px solid var(--border-color);
    }

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

    .hero-content p {
        font-size: 1rem;
    }

    .hero {
        padding: 60px 20px;
    }

    .categories-grid {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    }

    .about-content {
        grid-template-columns: 1fr;
    }

    .about-stats {
        grid-template-columns: 1fr;
    }

    .newsletter-form {
        flex-direction: column;
    }

    .newsletter-form input,
    .newsletter-form button {
        width: 100%;
    }

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

    .filter-section {
        justify-content: flex-start;
        overflow-x: auto;
        padding-bottom: 0.5rem;
    }

    .filter-btn {
        white-space: nowrap;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 1.5rem;
    }

    .categories-section h2,
    .courses-section h2,
    .about-section h2,
    .newsletter-section h2 {
        font-size: 1.5rem;
    }

    .stat h3 {
        font-size: 2rem;
    }

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

/* Pagination Styles */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 2rem;
    gap: 1rem;
}

.pagination button {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.pagination button:hover:not(:disabled) {
    background: var(--primary-mint);
    color: var(--white);
    border-color: var(--primary-mint);
}

.pagination button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.page-info {
    color: var(--text-secondary);
    font-size: 0.9rem;
}