:root {
    --primary-bg: #0a192f;
    --secondary-bg: #112240;
    --primary-accent: #64ffda;
    --primary-text: #ccd6f6;
    --secondary-text: #8892b0;
    --heading-text: #ffffff;
    --font-primary: 'Open Sans', sans-serif;
    --font-secondary: 'Poppins', sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background-color: var(--primary-bg);
    color: var(--primary-text);
    line-height: 1.6;
}

.main-header {
    background-color: rgba(10, 25, 47, 0.85);
    padding: 1rem 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    transition: top 0.3s;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    font-family: var(--font-secondary);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--heading-text);
}

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

.nav-links a {
    color: var(--primary-text);
    text-decoration: none;
    font-size: 1rem;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: var(--primary-accent);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.cart-icon, .wallet-icon, .login-button {
    position: relative;
    color: var(--primary-text);
    font-size: 1.25rem;
    text-decoration: none;
    transition: color 0.3s ease;
}

.cart-icon:hover, .wallet-icon:hover, .login-button:hover {
    color: var(--primary-accent);
}

#wallet-balance-header {
    font-size: 1rem;
    margin-left: 0.5rem;
    color: var(--primary-accent);
}

.cart-count {
    position: absolute;
    top: -8px;
    right: -12px;
    background-color: var(--primary-accent);
    color: var(--primary-bg);
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--primary-accent);
    font-size: 1.5rem;
    cursor: pointer;
    z-index: 101;
}

.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0 2rem;
    background: url('https://images.unsplash.com/photo-1519389950473-47ba0277781c?q=80&w=2070&auto=format&fit=crop') no-repeat center center/cover;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(10, 25, 47, 0.7);
    z-index: 1;
}

.hero-content {
    position: relative;
    max-width: 800px;
    z-index: 2;
}

.hero-headline {
    font-family: var(--font-secondary);
    font-size: clamp(2.5rem, 5vw, 4rem);
    color: var(--heading-text);
    margin-bottom: 1rem;
}

.hero-tagline {
    font-size: clamp(1rem, 3vw, 1.25rem);
    color: var(--secondary-text);
    margin-bottom: 2rem;
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    text-decoration: none;
    font-family: var(--font-secondary);
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-primary {
    background-color: transparent;
    border: 1px solid var(--primary-accent);
    color: var(--primary-accent);
}

.btn-primary:hover {
    background-color: rgba(100, 255, 218, 0.1);
}

.btn-secondary {
    background-color: var(--primary-accent);
    border: 1px solid var(--primary-accent);
    color: var(--primary-bg);
}

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

.content-section {
    padding: 6rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.page-hero {
    padding: 4rem 2rem;
    text-align: center;
    border-bottom: 1px solid var(--secondary-bg);
}

.section-title {
    font-family: var(--font-secondary);
    font-size: 2.5rem;
    color: var(--heading-text);
    text-align: center;
    margin-bottom: 3rem;
}

.subsection-title {
    font-family: var(--font-secondary);
    font-size: 2rem;
    color: var(--heading-text);
    margin-bottom: 2.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--primary-accent);
    display: inline-block;
}

.section-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    font-size: 1.1rem;
}

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

.about-image img {
    width: 100%;
    border-radius: 8px;
}

.courses-grid, .home-courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.course-card, .home-course-card {
    background-color: var(--secondary-bg);
    border-radius: 8px;
    overflow: hidden;
    text-align: left;
    box-shadow: 0 10px 30px -15px rgba(2, 12, 27, 0.7);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
}

.course-card:hover, .home-course-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 30px -15px rgba(2, 12, 27, 0.7);
}

.course-image, .home-course-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.course-card-content, .home-course-content {
    padding: 1.5rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.course-card h3, .home-course-content h3 {
    font-family: var(--font-secondary);
    font-size: 1.25rem;
    color: var(--heading-text);
    margin-bottom: 1rem;
}

.course-card p, .home-course-content p {
    font-size: 0.95rem;
    color: var(--secondary-text);
    flex-grow: 1;
    margin-bottom: 1.5rem;
}

.course-card-footer {
    margin-top: auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.course-card-price {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-accent);
}

.home-articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.home-article-card {
    background-color: var(--secondary-bg);
    border-radius: 8px;
    overflow: hidden;
    text-align: left;
    box-shadow: 0 10px 30px -15px rgba(2, 12, 27, 0.7);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--secondary-bg);
}

.home-article-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 30px -15px rgba(2, 12, 27, 0.7);
    border-color: var(--primary-accent);
}

.home-article-card-content {
    padding: 1.5rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.home-article-card h4 {
    font-family: var(--font-secondary);
    font-size: 1.25rem;
    color: var(--heading-text);
    margin-bottom: 1rem;
}

.home-article-card a {
    text-decoration: none;
    color: var(--heading-text);
    transition: color 0.3s ease;
}

.home-article-card a:hover h4 {
    color: var(--primary-accent);
}

.home-article-card p {
    font-size: 0.95rem;
    color: var(--secondary-text);
    flex-grow: 1;
    margin-bottom: 1.5rem;
}

.read-more-link {
    font-family: var(--font-secondary);
    color: var(--primary-accent);
    text-decoration: none;
    font-weight: 600;
    margin-top: auto;
    align-self: flex-end;
}

.read-more-link:hover {
    text-decoration: underline;
}

.contact-form {
    max-width: 800px;
    margin: 3rem auto 0;
    display: grid;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-family: var(--font-secondary);
    font-size: 1rem;
    color: var(--primary-text);
    margin-bottom: 0.5rem;
}

.form-group input, .form-group textarea {
    padding: 0.75rem;
    background-color: var(--secondary-bg);
    border: 1px solid var(--primary-accent);
    color: var(--primary-text);
    border-radius: 4px;
    font-family: var(--font-primary);
    font-size: 1rem;
}

.form-group input:focus, .form-group textarea:focus {
    outline: none;
    box-shadow: 0 0 0 2px var(--primary-accent);
}

.auth-container {
    max-width: 450px;
    margin: 4rem auto;
    padding: 2.5rem;
    background-color: var(--secondary-bg);
    border-radius: 8px;
    box-shadow: 0 10px 30px -15px rgba(2, 12, 27, 0.7);
}

.auth-form {
    display: grid;
    gap: 1.5rem;
}

.auth-switch {
    text-align: center;
    margin-top: 1.5rem;
    color: var(--secondary-text);
}

.auth-switch a {
    color: var(--primary-accent);
    text-decoration: none;
    font-weight: 600;
}

.auth-switch a:hover {
    text-decoration: underline;
}

.payment-container {
    max-width: 800px;
    margin: 0 auto;
    background-color: var(--secondary-bg);
    padding: 2rem;
    border-radius: 8px;
}

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

.payment-method-tab {
    background: none;
    border: 1px solid var(--secondary-text);
    color: var(--secondary-text);
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.payment-method-tab.active, .payment-method-tab:hover {
    background-color: var(--primary-accent);
    color: var(--primary-bg);
    border-color: var(--primary-accent);
}

.payment-method-content {
    display: none;
}

.payment-method-content.active {
    display: block;
}

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

.payment-form .form-group-row .form-group {
    flex: 1;
}

.upi-options {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 2rem;
}

.upi-payment-button {
    cursor: pointer;
    transition: color 0.3s ease, transform 0.3s ease;
    padding: 0.5rem;
    border-radius: 4px;
}

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

.upi-payment-button.selected {
    color: var(--primary-accent);
    background-color: rgba(100, 255, 218, 0.1);
}

.qr-timer-container {
    text-align: center;
    margin-bottom: 1rem;
    font-size: 1.2rem;
    color: var(--primary-accent);
    height: 20px;
}

.qr-code-container {
    margin-top: 2rem;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 240px;
}

.qr-code-container img {
    background-color: white;
    padding: 10px;
    border-radius: 8px;
}

/* Cart Styles */
.cart-container {
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    background-color: var(--secondary-bg);
    padding: 2rem;
    border-radius: 8px;
}

.cart-item {
    display: grid;
    grid-template-columns: 100px 1fr auto auto;
    gap: 1.5rem;
    align-items: center;
    padding: 1.5rem 0;
    border-bottom: 1px solid #233554;
}

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

.cart-item-image {
    width: 100px;
    height: 100px;
    object-fit: cover;
    border-radius: 4px;
}

.cart-item-details h3 {
    font-family: var(--font-secondary);
    font-size: 1.1rem;
    color: var(--heading-text);
    margin-bottom: 0.5rem;
}

.cart-item-details p {
    font-size: 0.9rem;
    color: var(--secondary-text);
}

.cart-item-price {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary-accent);
}

.cart-item-remove {
    background: none;
    border: none;
    color: #ff6464;
    font-size: 1.2rem;
    cursor: pointer;
    transition: color 0.3s ease;
}

.cart-item-remove:hover {
    color: #ff3c3c;
}

.cart-total {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--primary-accent);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.cart-total p {
    font-family: var(--font-secondary);
    font-size: 1.5rem;
    color: var(--heading-text);
}

.success-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    background-color: var(--secondary-bg);
    padding: 4rem 2rem;
    border-radius: 8px;
    max-width: 700px;
    margin: 2rem auto;
    box-shadow: 0 10px 30px -15px rgba(2, 12, 27, 0.7);
}

.success-icon {
    font-size: 5rem;
    color: var(--primary-accent);
    margin-bottom: 2rem;
}

.success-container h1 {
    font-family: var(--font-secondary);
    font-size: 2.25rem;
    color: var(--heading-text);
    margin-bottom: 1rem;
}

.success-container p {
    font-size: 1.1rem;
    color: var(--secondary-text);
    margin-bottom: 2.5rem;
    max-width: 500px;
}

.transaction-details {
    background-color: var(--primary-bg);
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 2.5rem;
    text-align: left;
    width: 100%;
    max-width: 400px;
}

.transaction-details p {
    font-size: 1rem;
    color: var(--primary-text);
    margin-bottom: 0.5rem;
}

.transaction-details p strong {
    color: var(--primary-accent);
}

.email-verification {
    width: 100%;
    max-width: 450px;
}

#email-verification-form {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

#customer-email {
    flex-grow: 1;
    padding: 0.75rem;
    background-color: var(--primary-bg);
    border: 1px solid var(--primary-accent);
    color: var(--primary-text);
    border-radius: 4px;
    font-family: var(--font-primary);
    font-size: 1rem;
}

#customer-email:focus {
    outline: none;
    box-shadow: 0 0 0 2px var(--primary-accent);
}


.main-footer {
    background-color: var(--secondary-bg);
    padding: 2rem;
    text-align: center;
    border-top: 1px solid var(--primary-accent);
}

.main-footer p {
    font-size: 0.9rem;
    color: var(--secondary-text);
}

.main-footer a {
    color: var(--primary-text);
    text-decoration: none;
    transition: color 0.3s ease;
}

.main-footer a:hover {
    color: var(--primary-accent);
}

/* Wallet Styles */
.wallet-section {
    max-width: 600px;
    margin: 0 auto;
    padding: 4rem 2rem;
}

.wallet-balance-card, .wallet-actions-card, .wallet-perks-card {
    background-color: var(--secondary-bg);
    padding: 2.5rem;
    border-radius: 8px;
    box-shadow: 0 10px 30px -15px rgba(2, 12, 27, 0.7);
    text-align: center;
    margin-bottom: 2rem;
}

.wallet-balance-card h2 {
    font-family: var(--font-secondary);
    font-size: 1.5rem;
    color: var(--heading-text);
    margin-bottom: 1rem;
}

#wallet-balance-amount {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-accent);
}

.wallet-perks-card {
    border: 1px solid var(--primary-accent);
}

.wallet-perks-card h3 {
    font-family: var(--font-secondary);
    font-size: 1.5rem;
    color: var(--heading-text);
    margin-bottom: 1rem;
}

.wallet-perks-card h3 .fas {
    color: var(--primary-accent);
    margin-right: 0.5rem;
}

.wallet-perks-card p {
    font-size: 1.1rem;
    color: var(--secondary-text);
}

.wallet-perks-card p strong {
    color: var(--primary-accent);
    font-weight: 700;
}

.wallet-actions-card h2 {
    font-family: var(--font-secondary);
    font-size: 1.5rem;
    color: var(--heading-text);
    margin-bottom: 1.5rem;
}

.add-money-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    align-items: center;
}

.add-money-form input {
    padding: 0.75rem;
    background-color: var(--primary-bg);
    border: 1px solid var(--primary-accent);
    color: var(--primary-text);
    border-radius: 4px;
    font-family: var(--font-primary);
    font-size: 1rem;
    width: 100%;
    max-width: 300px;
    text-align: center;
}

.add-money-form input:focus {
    outline: none;
    box-shadow: 0 0 0 2px var(--primary-accent);
}

@media (max-width: 992px) {
    .about-content {
        grid-template-columns: 1fr;
    }

    .courses-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--secondary-bg);
        padding: 1rem 0;
    }
    .nav-links.active {
        display: flex;
    }
    #user-state {
        display: flex;
        gap: 1rem;
        align-items: center;
        position: static; /* Reset position */
        background-color: transparent;
        padding: 0;
        width: auto;
    }
    .user-greeting {
        display: none; /* Hide greeting on smaller screens to save space */
    }
    #user-state .profile-icon {
        font-size: 1.25rem;
    }
    .menu-toggle {
        display: block;
    }
    .payment-form .form-group-row {
        flex-direction: column;
        gap: 0;
    }
    .main-footer p {
        flex-direction: column;
        gap: 0.5rem;
    }

    .cart-item {
        grid-template-columns: 80px 1fr;
        grid-template-rows: auto auto auto;
        gap: 1rem;
    }

    .cart-item-image {
        grid-row: 1 / span 2;
        width: 80px;
        height: 80px;
    }
    
    .cart-item-details {
       grid-column: 2 / 3;
    }

    .cart-item-price {
        grid-row: 2;
        grid-column: 2;
        justify-self: start;
        margin-top: 0.5rem;
    }

    .cart-item-remove {
        grid-row: 1;
        grid-column: 2;
        justify-self: end;
        align-self: start;
    }

    .cart-total {
        flex-direction: column;
        align-items: flex-start;
        gap: 1.5rem;
    }
    
    .success-container {
        padding: 3rem 1.5rem;
    }

    .success-icon {
        font-size: 4rem;
    }

    .success-container h1 {
        font-size: 1.75rem;
    }

    .wallet-section {
        padding: 2rem 1rem;
    }

    .wallet-balance-card, .wallet-actions-card, .wallet-perks-card {
        padding: 2rem;
    }

    #wallet-balance-amount {
        font-size: 2.5rem;
    }

    .login-button {
        display: block;
        margin-top: 1rem;
        text-align: center;
    }
}

@media (max-width: 480px) {
    #email-verification-form {
        flex-direction: column;
    }
    .auth-container {
        margin: 2rem auto;
        padding: 2rem;
    }
    .courses-grid, .home-articles-grid, .home-courses-grid {
        grid-template-columns: 1fr;
    }
    .upi-options {
        flex-direction: column;
        align-items: center;
    }

    .success-container {
        padding: 2.5rem 1rem;
    }

    .success-icon {
        font-size: 3rem;
    }

    .success-container h1 {
        font-size: 1.5rem;
    }

    .success-container p {
        font-size: 1rem;
    }

    .main-header {
        padding: 1rem;
    }

    .content-section {
        padding: 4rem 1rem;
    }

    .main-footer {
        padding: 1.5rem;
    }

    .add-money-form {
        flex-direction: column;
    }

    .add-money-form input {
        width: 100%;
    }
}