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

:root {
    --primary-color: #000;
    --secondary-color: #666;
    --bg-color: #fff;
    --bg-alt: #fafafa;
    --border-color: #e5e5e5;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --max-width: 1400px;
    --border-radius: 7px;
    --transition: all 0.2s ease;
}

@media (prefers-color-scheme: dark) {
    :root {
        --primary-color: #fff;
        --secondary-color: #999;
        --bg-color: #0a0a0a;
        --bg-alt: #141414;
        --border-color: #2a2a2a;
    }
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--primary-color);
    background-color: var(--bg-color);
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* Header */
.header {
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    padding: var(--spacing-sm) 0;
}

@media (prefers-color-scheme: dark) {
    .header {
        background: rgba(10, 10, 10, 0.95);
    }
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    width: 32px;
    height: 32px;
    display: block;
}

.nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav a {
    text-decoration: none;
    color: var(--secondary-color);
    font-size: 0.95rem;
    transition: var(--transition);
}

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

/* Buttons */
.btn-primary {
    display: inline-block;
    background: var(--primary-color);
    color: var(--bg-color) !important;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 0.95rem;
}

.btn-primary:hover {
    background: #333;
    transform: translateY(-1px);
}

@media (prefers-color-scheme: dark) {
    .btn-primary {
        background: #fff;
        color: #000;
    }
    
    .btn-primary:hover {
        background: #e0e0e0;
    }
}

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

/* Hero Section */
.hero {
    padding: var(--spacing-xl) 0;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-icon {
    width: 120px;
    height: 120px;
    display: block;
    margin: 0 auto var(--spacing-md);
}

.hero-headline {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.hero-subheadline {
    font-size: clamp(1.1rem, 2vw, 1.3rem);
    color: var(--secondary-color);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.cta-cluster {
    display: flex;
    justify-content: center;
    margin-bottom: var(--spacing-sm);
}

.micro-trust {
    font-size: 0.9rem;
    color: var(--secondary-color);
}

/* Image Grid Section */
.image-grid-section {
    padding: var(--spacing-sm) 0;
}

.image-grid {
    position: relative;
    width: 100%;
}

.grid-item {
    background: var(--bg-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

.grid-image {
    width: 100%;
    background: var(--bg-alt);
    display: block;
    overflow: hidden;
    position: relative;
}

.grid-image img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: contain;
}

.grid-text {
    padding: var(--spacing-md);
    flex-shrink: 0;
}

.grid-text h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    line-height: 1.3;
}

.grid-item-1 .grid-text h3 {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
}

.grid-text p {
    color: var(--secondary-color);
    line-height: 1.6;
    font-size: 0.9rem;
}

.grid-item-1 .grid-text p {
    font-size: 1rem;
}

/* Section styles */
section {
    padding: var(--spacing-xl) 0;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-lg);
    text-align: center;
    letter-spacing: -0.02em;
}

/* Final CTA */
.final-cta {
    text-align: center;
    padding: var(--spacing-xl) 0;
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

/* Footer */
.footer {
    background: var(--bg-alt);
    padding: var(--spacing-lg) 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.footer-microcopy {
    font-size: 0.9rem;
    color: var(--secondary-color);
    margin-bottom: var(--spacing-md);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--secondary-color);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

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

/* Privacy Policy Section */
.privacy-policy {
    padding: var(--spacing-xl) 0;
    min-height: calc(100vh - 200px);
}

.privacy-content {
    max-width: 700px;
    margin: 0 auto;
}

.privacy-content h1 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.02em;
}

.privacy-content h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
}

.privacy-content p {
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
    color: var(--primary-color);
}

.privacy-content ul {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-lg);
    line-height: 1.7;
}

.privacy-content li {
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.privacy-content a {
    color: var(--primary-color);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 2px;
    transition: var(--transition);
}

.privacy-content a:hover {
    opacity: 0.7;
}

.privacy-updated {
    margin-top: var(--spacing-xl);
    font-size: 0.9rem;
    color: var(--secondary-color);
    font-style: italic;
}

/* Responsive */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }

    .nav {
        width: 100%;
    }

    .btn-primary {
        width: 100%;
        text-align: center;
    }

    section {
        padding: var(--spacing-lg) 0;
    }

    .download-buttons {
        flex-direction: column;
    }

    .btn-large {
        width: 100%;
    }

    .privacy-content {
        padding: 0 var(--spacing-sm);
    }
    
    .privacy-content h2 {
        font-size: 1.3rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }

    .hero {
        padding: var(--spacing-lg) 0;
    }

    .image-grid {
        gap: var(--spacing-sm);
    }
}

/* Dark mode image placeholder adjustment */
@media (prefers-color-scheme: dark) {
    .image-placeholder {
        opacity: 0.2;
    }
}