:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --secondary: #f97316;
    --text-main: #1f2937;
    --text-muted: #6b7280;
    --bg-light: #f8fafc;
    --white: #ffffff;
    --container-width: 1100px;
    --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--text-main);
    background-color: var(--white);
    overflow-x: hidden;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header & Nav */
header {
    height: 80px;
    display: flex;
    align-items: center;
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    z-index: 1000;
}

nav {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--text-main);
}

.logo span {
    color: var(--primary);
}

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

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

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

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 700;
    transition: transform 0.3s, background 0.3s;
}

.btn:hover {
    transform: translateY(-3px);
}

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

.btn-secondary {
    background: var(--bg-light);
    color: var(--text-main);
    margin-left: 1rem;
}

.btn-small {
    padding: 0.5rem 1.2rem;
    background: var(--primary);
    color: var(--white);
    border-radius: 50px;
    font-size: 0.9rem;
}

.btn-white {
    background: var(--white);
    color: var(--primary);
    font-size: 1.1rem;
}

/* Hero Section */
.hero {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6rem 0;
    min-height: calc(100vh - 80px);
}

.hero-content {
    flex: 1;
    max-width: 550px;
}

.hero-content h1 {
    font-size: 3.5rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

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

.hero-content p {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
}

.hero-image {
    flex: 1;
    position: relative;
    display: flex;
    justify-content: center;
}

.hero-image img {
    max-width: 100%;
    height: auto;
    z-index: 2;
    filter: drop-shadow(0 20px 30px rgba(0,0,0,0.15));
}

.image-bg-blob {
    position: absolute;
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, #e0e7ff 0%, #fef3c7 100%);
    border-radius: 50%;
    z-index: 1;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    filter: blur(40px);
}

/* Features */
.features {
    padding: 6rem 0;
}

.section-title {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title h2 {
    font-size: 2.5rem;
}

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

.feature-card {
    padding: 3rem 2rem;
    background: var(--bg-light);
    border-radius: 24px;
    text-align: center;
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-10px);
}

.feature-card .icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.feature-card h3 {
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.feature-card p {
    color: var(--text-muted);
}

/* Details Section */
.details {
    padding: 6rem 0;
}

.details-split {
    display: flex;
    align-items: center;
    gap: 4rem;
}

.details-image {
    flex: 1;
}

.details-image img {
    width: 100%;
    border-radius: 24px;
}

.details-text {
    flex: 1;
}

.details-text h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.details-list {
    list-style: none;
    margin-top: 2rem;
}

.details-list li {
    margin-bottom: 1rem;
    font-weight: 500;
}

/* CTA Section */
.cta-section {
    padding: 6rem 0;
}

.cta-box {
    background: var(--primary);
    padding: 5rem 2rem;
    border-radius: 32px;
    text-align: center;
    color: var(--white);
}

.cta-box h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.cta-box p {
    font-size: 1.2rem;
    margin-bottom: 2.5rem;
    opacity: 0.9;
}

/* Footer */
footer {
    padding: 4rem 0;
    border-top: 1px solid #eee;
}

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

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

.footer-links a {
    text-decoration: none;
    color: var(--text-muted);
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding: 3rem 0;
    }

    .hero-content {
        margin-bottom: 3rem;
    }

    .hero-content h1 {
        font-size: 2.5rem;
    }

    .hero-btns {
        display: flex;
        flex-direction: column;
        gap: 1rem;
    }

    .btn-secondary {
        margin-left: 0;
    }

    .details-split {
        flex-direction: column-reverse;
    }

    .nav-links {
        display: none;
    }

    .cta-box h2 {
        font-size: 2rem;
    }
}

/* Checkout Page Styles */
.checkout-section {
    padding: 4rem 0 8rem;
}

.checkout-grid {
    display: flex;
    gap: 4rem;
    align-items: flex-start;
}

.checkout-form-container {
    flex: 1.5;
    background: var(--white);
    padding: 2.5rem;
    border-radius: 24px;
    box-shadow: var(--shadow);
}

.checkout-form-container h2 {
    margin-bottom: 2rem;
    font-size: 2rem;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    font-size: 0.9rem;
}

.form-group input {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.3s;
}

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

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

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

.checkout-summary {
    flex: 1;
    background: var(--bg-light);
    padding: 2.5rem;
    border-radius: 24px;
    position: sticky;
    top: 100px;
}

.checkout-summary h3 {
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.summary-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid #e2e8f0;
}

.summary-item img {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 12px;
}

.summary-details h4 {
    margin-bottom: 0.2rem;
}

.summary-details p {
    color: var(--text-muted);
    font-weight: 700;
}

.summary-total {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.2rem;
    font-weight: 700;
    margin-top: 2rem;
}

@media (max-width: 992px) {
    .checkout-grid {
        flex-direction: column-reverse;
        gap: 2rem;
    }

    .checkout-summary {
        position: static;
        width: 100%;
    }
}

/* Checkout Steps Indicator */
.checkout-steps-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
    font-weight: 700;
}

.checkout-step {
    font-size: 0.9rem;
    transition: opacity 0.3s ease;
}

.step-active {
    opacity: 1;
    color: var(--primary);
}

.step-inactive {
    opacity: 0.4;
}

.step-dots {
    display: flex;
    gap: 0.4rem;
}

.step-dots span {
    width: 4px;
    height: 4px;
    background: #cbd5e1;
    border-radius: 50%;
}

.payment-link-container {
    text-align: center;
    padding: 2rem 0;
}

.payment-btn {
    display: block;
    width: 100%;
    background: #0070ba; /* PayPal blue as example */
    color: white;
    text-decoration: none;
    padding: 1rem;
    border-radius: 12px;
    font-weight: 700;
    margin-bottom: 1.5rem;
    transition: background 0.3s;
}

.payment-btn:hover {
    background: #005ea6;
}