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

:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --accent-color: #3b82f6;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
}

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

/* Header Styles */
.header {
    background-color: var(--bg-white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar {
    padding: 1rem 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

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

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

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: var(--text-dark);
    transition: all 0.3s ease;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 100px 0;
    text-align: center;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.95;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-bundle {
    background-color: var(--primary-color);
    color: white;
    width: 100%;
    text-align: center;
    margin-top: 1.5rem;
}

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

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

.about .container {
    max-width: 900px;
}

.about h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: var(--text-dark);
}

.about p {
    font-size: 1.125rem;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 1.5rem;
    text-align: center;
}

/* Instant Access Section */
.instant-access {
    padding: 80px 0;
    text-align: center;
    background-color: var(--bg-light);
}

.instant-access h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

.instant-access p {
    font-size: 1.125rem;
    color: var(--text-light);
    max-width: 800px;
    margin: 0 auto 2rem;
    line-height: 1.8;
}

/* Features Section */
.features {
    padding: 80px 0;
    background-color: var(--bg-white);
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--text-dark);
}

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

.feature-card {
    text-align: center;
    padding: 2.5rem 2rem;
    background-color: var(--bg-light);
    border-radius: 12px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.feature-card p {
    color: var(--text-light);
    font-size: 1rem;
}

/* Bundles Section */
.bundles {
    padding: 80px 0;
    background-color: var(--bg-white);
}

.bundles.premium-bundles {
    background-color: var(--bg-light);
}

.bundles h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--text-dark);
}

.bundles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    max-width: 1000px;
    margin: 0 auto;
}

.bundle-card {
    background-color: var(--bg-white);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    padding: 0;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    max-width: 320px;
    margin: 0 auto;
}

.bundle-image {
    width: 100%;
    height: 180px;
    overflow: hidden;
    position: relative;
    background-color: #f9fafb;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px 12px 0 0;
}

.bundle-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: transform 0.3s ease;
    padding: 8px;
}

.bundle-card:hover .bundle-image img {
    transform: none;
}

.bundle-card > *:not(.bundle-image) {
    padding: 0 1.5rem;
}

.bundle-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.bundle-card.featured {
    border-color: var(--primary-color);
    border-width: 3px;
    transform: scale(1.02);
}

.bundle-card.featured::before {
    content: "Popular";
    position: absolute;
    top: 8px;
    right: 8px;
    z-index: 10;
    background-color: var(--primary-color);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    box-shadow: var(--shadow);
}

.bundle-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    color: var(--text-dark);
    padding-top: 1.25rem;
}

.bundle-description {
    color: var(--text-light);
    margin-bottom: 1rem;
    font-size: 0.9rem;
    min-height: 40px;
}

.bundle-card .btn {
    margin-bottom: 1.5rem;
    padding: 10px 24px;
    font-size: 0.9rem;
}

.price {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.75rem;
}

.bundle-card.premium {
    background-color: var(--bg-white);
}

.bundle-card.premium.featured {
    background-color: var(--bg-white);
}

/* Fully Digital Section */
.fully-digital {
    padding: 80px 0;
    text-align: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.fully-digital h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.fully-digital p {
    font-size: 1.125rem;
    max-width: 800px;
    margin: 0 auto 2rem;
    opacity: 0.95;
    line-height: 1.8;
}

/* Footer */
.footer {
    background-color: var(--text-dark);
    color: white;
    padding: 2rem 0;
    text-align: center;
}

.footer p {
    margin: 0;
    opacity: 0.8;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--bg-white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow);
        padding: 2rem 0;
    }

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

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

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

    .instant-access h2,
    .features h2,
    .bundles h2,
    .fully-digital h2 {
        font-size: 2rem;
    }

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

    .bundle-card.featured {
        transform: scale(1);
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 60px 0;
    }

    .hero h1 {
        font-size: 1.75rem;
    }

    .instant-access,
    .features,
    .bundles,
    .fully-digital {
        padding: 60px 0;
    }
}

/* Bundle Detail Page Styles */
.bundle-detail {
    padding: 100px 0;
    background-color: var(--bg-light);
}

.bundle-detail-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    max-width: 1000px;
    margin: 0 auto;
    background-color: var(--bg-white);
    padding: 3rem;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
}

.bundle-detail-image {
    width: 100%;
    height: 400px;
    background-color: #f9fafb;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.bundle-detail-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: 20px;
}

.bundle-detail-info h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.bundle-detail-description {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 2rem;
}

.bundle-detail-price {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 2rem;
}

.bundle-features {
    list-style: none;
    margin-bottom: 2rem;
    padding: 0;
}

.bundle-features li {
    padding: 0.75rem 0;
    font-size: 1.1rem;
    color: var(--text-dark);
    border-bottom: 1px solid var(--border-color);
}

.bundle-features li:last-child {
    border-bottom: none;
}

.btn-large {
    padding: 16px 40px;
    font-size: 1.1rem;
    margin-right: 1rem;
    margin-bottom: 1rem;
}

.btn-block {
    width: 100%;
    display: block;
    margin-right: 0;
}

/* Checkout Page Styles */
.checkout-section {
    padding: 100px 0;
    background-color: var(--bg-light);
    min-height: 80vh;
}

.checkout-section h1 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--text-dark);
}

.checkout-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.checkout-form-container {
    background-color: var(--bg-white);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.checkout-form-container h2 {
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

.order-summary {
    background-color: var(--bg-light);
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 2rem;
}

.order-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 0;
}

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

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-dark);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

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

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    font-weight: normal;
    cursor: pointer;
}

.checkbox-group input[type="checkbox"] {
    width: auto;
    margin-right: 0.5rem;
}

.checkbox-group a {
    color: var(--primary-color);
    text-decoration: none;
}

.checkbox-group a:hover {
    text-decoration: underline;
}

.checkout-summary {
    background-color: var(--bg-white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    height: fit-content;
    position: sticky;
    top: 100px;
}

.checkout-summary h2 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

.summary-item {
    display: flex;
    justify-content: space-between;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
}

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

.summary-total {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-top: 1rem;
    padding-top: 1.5rem;
    border-top: 2px solid var(--border-color);
}

/* Responsive Styles for Bundle Detail and Checkout */
@media (max-width: 968px) {
    .bundle-detail-content {
        grid-template-columns: 1fr;
    }
    
    .checkout-content {
        grid-template-columns: 1fr;
    }
    
    .checkout-summary {
        position: static;
    }
}

@media (max-width: 768px) {
    .bundle-detail {
        padding: 60px 0;
    }
    
    .bundle-detail-content {
        padding: 2rem;
    }
    
    .bundle-detail-info h1 {
        font-size: 2rem;
    }
    
    .bundle-detail-price {
        font-size: 2.5rem;
    }
    
    .checkout-section {
        padding: 60px 0;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
}

/* Processing Overlay Styles */
#processing-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 10000;
    flex-direction: column;
}

.processing-content {
    text-align: center;
    color: white;
    padding: 2rem;
}

.processing-content h2 {
    font-size: 2rem;
    margin: 2rem 0 1rem;
    color: white;
}

.processing-content p {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* Spinner Animation */
.spinner {
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top: 4px solid white;
    border-radius: 50%;
    width: 60px;
    height: 60px;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}