/* Variables */
:root {
    --primary: #667eea;
    --primary-dark: #5a67d8;
    --secondary: #764ba2;
    --dark: #1a1a1a;
    --light: #f7fafc;
    --gray: #718096;
    --success: #48bb78;
    --danger: #f56565;
    --warning: #fbbf24;
    --radius: 10px;
    --shadow: 0 10px 30px rgba(0,0,0,0.1);
}

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

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

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

/* Navigation */
.navbar {
    background: white;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary);
}

.logo {
    font-size: 2rem;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: var(--dark);
    transition: color 0.3s;
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--dark);
    margin: 3px 0;
    transition: 0.3s;
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-block;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

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

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

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

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    padding: 100px 0;
    min-height: 600px;
    display: flex;
    align-items: center;
}

.hero-content {
    flex: 1;
}

.hero-title {
    font-size: 3rem;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Card Preview */
.card-preview {
    width: 300px;
    height: 190px;
    perspective: 1000px;
}

.card-front {
    background: var(--dark);
    color: var(--warning);
    padding: 20px;
    border-radius: 15px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.card-front h3 {
    color: white;
    font-size: 1.5rem;
}

/* Sections */
section {
    padding: 80px 0;
}

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

/* Features */
.features {
    background: white;
}

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

.feature-card {
    text-align: center;
    padding: 2rem;
    border-radius: var(--radius);
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
}

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

.feature-card h3 {
    margin-bottom: 1rem;
    color: var(--dark);
}

/* Packages */
.packages {
    background: var(--light);
}

.packages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.package-card {
    background: white;
    border-radius: var(--radius);
    padding: 2rem;
    position: relative;
    box-shadow: var(--shadow);
    transition: transform 0.3s;
}

.package-card:hover {
    transform: translateY(-5px);
}

.package-card.featured {
    border: 2px solid var(--primary);
    transform: scale(1.05);
}

.badge {
    position: absolute;
    top: -10px;
    right: 20px;
    background: var(--primary);
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
}

.package-title {
    text-align: center;
    margin-bottom: 1rem;
}

.package-price {
    text-align: center;
    margin-bottom: 2rem;
}

.price {
    font-size: 3rem;
    font-weight: bold;
    color: var(--primary);
}

.package-features {
    list-style: none;
    margin-bottom: 2rem;
}

.package-features li {
    padding: 0.5rem 0;
    border-bottom: 1px solid #eee;
}

/* Upsells */
.upsells {
    background: white;
    padding: 2rem;
    border-radius: var(--radius);
    margin-top: 3rem;
}

.upsells h3 {
    text-align: center;
    margin-bottom: 2rem;
}

.upsell-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.upsell-item {
    display: flex;
    justify-content: space-between;
    padding: 1rem;
    background: var(--light);
    border-radius: var(--radius);
}

.upsell-price {
    color: var(--primary);
    font-weight: bold;
}

/* How it Works */
.how-it-works {
    background: white;
}

.steps {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 2rem;
}

.step {
    flex: 1;
    min-width: 200px;
    text-align: center;
}

.step-number {
    width: 60px;
    height: 60px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    margin: 0 auto 1rem;
}

/* Use Cases */
.use-cases {
    background: var(--light);
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.use-case {
    background: white;
    padding: 2rem;
    border-radius: var(--radius);
    text-align: center;
}

.use-case h3 {
    margin-bottom: 1rem;
}

/* Footer */
.footer {
    background: var(--dark);
    color: white;
    padding: 3rem 0 1rem;
}

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

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
}

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

.footer-section a {
    color: white;
    text-decoration: none;
    opacity: 0.8;
}

.footer-section a:hover {
    opacity: 1;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    opacity: 0.8;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: white;
    padding: 2rem;
    border-radius: var(--radius);
    max-width: 500px;
    width: 90%;
    position: relative;
}

.modal-close {
    position: absolute;
    top: 10px;
    right: 15px;
    font-size: 2rem;
    cursor: pointer;
    color: var(--gray);
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: var(--radius);
    font-size: 1rem;
}

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

.checkbox {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
}

.checkbox input[type="checkbox"] {
    margin-top: 5px;
}

/* Utilities */
.text-center {
    text-align: center;
}

.mt-3 {
    margin-top: 1rem;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero .container {
        flex-direction: column;
    }
    
    .steps {
        flex-direction: column;
    }
    
    .package-card.featured {
        transform: none;
    }
}