/* CSS Reset & Base Styles */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-primary-light: #3b82f6;
    --color-secondary: #0f172a;
    --color-text: #1e293b;
    --color-text-light: #64748b;
    --color-background: #ffffff;
    --color-background-alt: #f8fafc;
    --color-border: #e2e8f0;
    --color-accent: #06b6d4;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-background);
}

/* Layout */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-secondary);
}

h1 { font-size: 3rem; }
h2 { font-size: 2.25rem; }
h3 { font-size: 1.25rem; }

@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
}

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

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: var(--color-background-alt);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

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

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

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

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

/* Header & Navigation */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 4rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-secondary);
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: white;
    border-radius: var(--radius-sm);
    font-weight: 700;
}

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

.nav-links a {
    text-decoration: none;
    color: var(--color-text-light);
    font-weight: 500;
    transition: color 0.2s ease;
}

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 4px;
    width: 2rem;
    height: 2rem;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-btn span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-secondary);
    transition: all 0.3s ease;
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -4px);
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }

    .nav-links {
        position: absolute;
        top: 4rem;
        left: 0;
        right: 0;
        flex-direction: column;
        background-color: var(--color-background);
        padding: 1.5rem;
        gap: 1rem;
        border-bottom: 1px solid var(--color-border);
        display: none;
    }

    .nav-links.active {
        display: flex;
    }
}

/* Hero Section */
.hero {
    padding: 8rem 0 5rem;
    text-align: center;
    background: linear-gradient(180deg, var(--color-background-alt) 0%, var(--color-background) 100%);
}

.hero-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-primary);
    background-color: rgba(37, 99, 235, 0.1);
    border-radius: 9999px;
    margin-bottom: 1.5rem;
}

.hero-title {
    max-width: 800px;
    margin: 0 auto 1.5rem;
}

.hero-subtitle {
    max-width: 650px;
    margin: 0 auto 2rem;
    font-size: 1.125rem;
    color: var(--color-text-light);
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Showcase Section */
.showcase {
    padding: 4rem 0;
    background-color: var(--color-background);
}

.showcase-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

@media (max-width: 768px) {
    .showcase-grid {
        grid-template-columns: 1fr;
    }
}

.showcase-item {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.showcase-item img {
    width: 100%;
    height: 280px;
    object-fit: cover;
    display: block;
    transition: transform 0.3s ease;
}

.showcase-item:hover img {
    transform: scale(1.05);
}

.showcase-label {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 1rem 1.5rem;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.7));
    color: white;
    font-weight: 600;
    font-size: 1.125rem;
}

/* Features Section */
.features {
    padding: 5rem 0;
}

.section-title {
    text-align: center;
    margin-bottom: 0.75rem;
}

.section-subtitle {
    text-align: center;
    color: var(--color-text-light);
    margin-bottom: 3rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

@media (max-width: 992px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
}

.feature-card {
    padding: 2rem;
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all 0.3s ease;
}

.feature-card:hover {
    border-color: var(--color-primary-light);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.feature-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 3.5rem;
    height: 3.5rem;
    background-color: var(--color-background-alt);
    border-radius: var(--radius-md);
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.feature-card h3 {
    margin-bottom: 0.75rem;
}

.feature-card p {
    color: var(--color-text-light);
    font-size: 0.9375rem;
}

/* Use Cases Section */
.use-cases {
    padding: 5rem 0;
    background-color: var(--color-background-alt);
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

@media (max-width: 768px) {
    .use-cases-grid {
        grid-template-columns: 1fr;
    }
}

.use-case-card {
    padding: 2rem;
    background-color: var(--color-background);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.use-case-card h3 {
    margin-bottom: 1rem;
    color: var(--color-primary);
}

.use-case-card p {
    color: var(--color-text-light);
}

/* Open Source Section */
.open-source {
    padding: 5rem 0;
}

.open-source-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.open-source-content h2 {
    margin-bottom: 1rem;
}

.open-source-content > p {
    color: var(--color-text-light);
    margin-bottom: 2rem;
}

.open-source-features {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1.5rem;
}

.os-feature {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text);
}

.os-feature svg {
    color: var(--color-primary);
}

/* CTA Section */
.cta {
    padding: 5rem 0;
    background: linear-gradient(135deg, var(--color-secondary) 0%, #1e3a5f 100%);
    text-align: center;
}

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

.cta p {
    color: rgba(255, 255, 255, 0.8);
    max-width: 600px;
    margin: 0 auto 2rem;
}

.cta-actions {
    display: flex;
    justify-content: center;
}

/* Footer */
.footer {
    padding: 4rem 0 2rem;
    background-color: var(--color-background-alt);
    border-top: 1px solid var(--color-border);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    gap: 4rem;
    margin-bottom: 3rem;
}

@media (max-width: 768px) {
    .footer-content {
        flex-direction: column;
        gap: 2rem;
    }
}

.footer-brand {
    max-width: 300px;
}

.footer-brand .logo {
    margin-bottom: 1rem;
}

.footer-brand p {
    color: var(--color-text-light);
    font-size: 0.9375rem;
}

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

@media (max-width: 576px) {
    .footer-links {
        flex-direction: column;
        gap: 2rem;
    }
}

.footer-column h4 {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
    color: var(--color-text);
}

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

.footer-column li {
    margin-bottom: 0.5rem;
}

.footer-column a {
    color: var(--color-text-light);
    text-decoration: none;
    font-size: 0.9375rem;
    transition: color 0.2s ease;
}

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

.footer-legal {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
}

.footer-legal h4 {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
    color: var(--color-text);
}

.legal-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    user-select: none;
    transition: color 0.2s ease;
}

.legal-toggle:hover {
    color: var(--color-primary);
}

.legal-toggle-icon {
    transition: transform 0.3s ease;
}

.legal-toggle.expanded .legal-toggle-icon {
    transform: rotate(180deg);
}

.legal-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.legal-content.expanded {
    max-height: 500px;
}

.footer-legal p {
    color: var(--color-text-light);
    font-size: 0.8125rem;
    line-height: 1.6;
    margin-bottom: 0.75rem;
}

.footer-legal address {
    font-style: normal;
    color: var(--color-text-light);
    font-size: 0.8125rem;
    line-height: 1.8;
    margin-bottom: 1rem;
}

.footer-legal a {
    color: var(--color-primary);
    text-decoration: none;
}

.footer-legal a:hover {
    text-decoration: underline;
}

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
    text-align: center;
}

.footer-bottom p {
    color: var(--color-text-light);
    font-size: 0.875rem;
}