/* Global Styles */
:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #10b981;
    --dark-color: #111827;
    --light-dark: #374151;
    --gray-light: #f3f4f6;
    --gray: #9ca3af;
    --white: #ffffff;
    --box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    background-color: var(--white);
    overflow-x: hidden;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

button, input {
    font-family: inherit;
}

/* Typography */
h1, h2, h3, h4 {
    line-height: 1.2;
    margin-bottom: 1rem;
    font-weight: 700;
}

h1 {
    font-size: 3.5rem;
    background: var(--gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

h2 {
    font-size: 2.5rem;
    color: var(--dark-color);
}

h3 {
    font-size: 1.75rem;
    color: var(--dark-color);
}

h4 {
    font-size: 1.25rem;
    color: var(--dark-color);
}

p {
    margin-bottom: 1rem;
    color: var(--light-dark);
}

.section-title {
    text-align: center;
    margin-bottom: 0.5rem;
}

.section-subtitle {
    text-align: center;
    font-size: 1.2rem;
    color: var(--gray);
    margin-bottom: 3rem;
}

/* Header Styles */
header {
    padding: 1rem 0;
    position: sticky;
    top: 0;
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    z-index: 100;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    gap: 1.5rem;
}

.nav-links a {
    transition: color 0.3s;
}

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

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

.login-btn {
    color: var(--primary-color);
    font-weight: 600;
    padding: 0.5rem 1rem;
    transition: color 0.3s;
}

.login-btn:hover {
    color: var(--primary-dark);
}

.signup-btn {
    background-color: var(--primary-color);
    color: var(--white);
    font-weight: 600;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    transition: background-color 0.3s;
}

.signup-btn:hover {
    background-color: var(--primary-dark);
}

/* Hero Section */
.hero {
    padding: 6rem 0;
    text-align: center;
    background: radial-gradient(circle at top center, rgba(99, 102, 241, 0.1) 0%, rgba(255, 255, 255, 0) 70%);
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--light-dark);
    margin-bottom: 2rem;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
}

.primary-btn {
    background: var(--gradient);
    color: var(--white);
    font-weight: 600;
    padding: 1rem 2rem;
    border-radius: 5px;
    transition: all 0.3s;
    box-shadow: var(--box-shadow);
}

.primary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 20px -3px rgba(0, 0, 0, 0.1), 0 6px 8px -2px rgba(0, 0, 0, 0.05);
}

.secondary-btn {
    background-color: var(--white);
    color: var(--primary-color);
    font-weight: 600;
    padding: 1rem 2rem;
    border-radius: 5px;
    border: 1px solid var(--primary-color);
    transition: all 0.3s;
}

.secondary-btn:hover {
    background-color: var(--gray-light);
}

/* Model Gallery */
.model-gallery {
    padding: 6rem 0;
    background-color: var(--gray-light);
}

.search-bar {
    display: flex;
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.search-bar input {
    flex: 1;
    padding: 1rem;
    border: 2px solid var(--gray);
    border-radius: 5px 0 0 5px;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s;
}

.search-bar input:focus {
    border-color: var(--primary-color);
}

.search-bar button {
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    padding: 0 1.5rem;
    border-radius: 0 5px 5px 0;
    cursor: pointer;
    transition: background-color 0.3s;
}

.search-bar button:hover {
    background-color: var(--primary-dark);
}

.featured-models {
    margin-bottom: 4rem;
}

.featured-models h3, .model-categories h3 {
    text-align: center;
    margin-bottom: 2rem;
}

.model-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
    gap: 2rem;
}

.model-card {
    background-color: var(--white);
    border-radius: 10px;
    padding: 1.5rem;
    box-shadow: var(--box-shadow);
    transition: transform 0.3s, box-shadow 0.3s;
    display: flex;
    flex-direction: column;
}

.model-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.model-card-header {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 0.5rem;
}

.model-tag {
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.25rem 0.5rem;
    border-radius: 5px;
    background-color: var(--secondary-color);
    color: var(--white);
}

.model-card h4 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.model-card p {
    flex-grow: 1;
    font-size: 0.95rem;
    color: var(--light-dark);
    margin-bottom: 1rem;
}

.model-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.model-tags span {
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
    border-radius: 20px;
    background-color: var(--gray-light);
    color: var(--light-dark);
}

.try-btn {
    align-self: flex-start;
    padding: 0.5rem 1rem;
    background-color: var(--primary-color);
    color: var(--white);
    border-radius: 5px;
    font-weight: 600;
    transition: background-color 0.3s;
}

.try-btn:hover {
    background-color: var(--primary-dark);
}

.category-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.category-tag {
    padding: 0.5rem 1rem;
    border-radius: 20px;
    border: 1px solid var(--gray);
    background-color: var(--white);
    color: var(--light-dark);
    cursor: pointer;
    transition: all 0.3s;
}

.category-tag:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.category-tag.active {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--white);
}

/* Use Cases Section */
.use-cases {
    padding: 6rem 0;
}

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

.use-case-card {
    text-align: center;
    padding: 2rem;
    border-radius: 10px;
    background-color: var(--gray-light);
    transition: transform 0.3s;
}

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

.use-case-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* Pricing Section */
.pricing-overview {
    padding: 6rem 0;
    background-color: var(--gray-light);
}

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

.pricing-card {
    background-color: var(--white);
    border-radius: 10px;
    padding: 2rem;
    box-shadow: var(--box-shadow);
    position: relative;
    transition: transform 0.3s;
}

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

.pricing-card.highlight {
    border: 2px solid var(--primary-color);
    transform: scale(1.05);
}

.pricing-card.highlight:hover {
    transform: scale(1.05) translateY(-5px);
}

.popular-tag {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--primary-color);
    color: var(--white);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.25rem 1rem;
    border-radius: 20px;
}

.price {
    text-align: center;
    margin: 1.5rem 0;
}

.amount {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--dark-color);
}

.period {
    font-size: 1rem;
    color: var(--gray);
}

.features {
    margin-bottom: 2rem;
}

.features li {
    margin-bottom: 0.75rem;
    color: var(--light-dark);
    position: relative;
    padding-left: 1.5rem;
}

.features li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: 700;
}

.pricing-btn {
    display: block;
    text-align: center;
    background-color: var(--primary-color);
    color: var(--white);
    padding: 0.75rem;
    border-radius: 5px;
    font-weight: 600;
    transition: background-color 0.3s;
}

.pricing-btn:hover {
    background-color: var(--primary-dark);
}

/* CTA Section */
.cta {
    padding: 6rem 0;
    text-align: center;
    background: var(--gradient);
}

.cta h2 {
    color: var(--white);
    margin-bottom: 1rem;
}

.cta p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

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

.cta .primary-btn:hover {
    background-color: var(--gray-light);
}

/* Footer */
footer {
    background-color: var(--dark-color);
    color: var(--white);
    padding: 4rem 0 2rem;
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    margin-bottom: 3rem;
    gap: 2rem;
}

.footer-logo h3 {
    color: var(--white);
}

.footer-logo p {
    color: var(--gray);
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 4rem;
}

.footer-col h4 {
    color: var(--white);
    margin-bottom: 1.5rem;
}

.footer-col ul li {
    margin-bottom: 0.75rem;
}

.footer-col ul li a {
    color: var(--gray);
    transition: color 0.3s;
}

.footer-col ul li a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: var(--gray);
    margin-bottom: 0;
}

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

.social-links a {
    color: var(--gray);
    font-size: 1.2rem;
    transition: color 0.3s;
}

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

/* Media Queries */
@media (max-width: 900px) {
    h1 {
        font-size: 2.75rem;
    }
    
    .nav-links, .auth-buttons {
        display: none;
    }
    
    .pricing-card.highlight {
        transform: scale(1);
    }
    
    .pricing-card.highlight:hover {
        transform: translateY(-5px);
    }
}

@media (max-width: 600px) {
    h1 {
        font-size: 2.25rem;
    }
    
    h2 {
        font-size: 2rem;
    }
    
    .hero {
        padding: 4rem 0;
    }
    
    .hero-subtitle {
        font-size: 1.25rem;
    }
    
    .cta-buttons {
        flex-direction: column;
        gap: 1rem;
    }
    
    .section-subtitle {
        font-size: 1rem;
    }
    
    .model-gallery, .use-cases, .pricing-overview, .cta {
        padding: 4rem 0;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 3rem;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 2rem;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}