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

:root {
    /* Colors - Minimalist palette inspired by Tuist */
    --color-text-primary: #111827;
    --color-text-secondary: #6B7280;
    --color-text-muted: #9CA3AF;
    --color-accent: #3B82F6;
    --color-accent-hover: #2563EB;
    --color-background: #ffffff;
    --color-background-secondary: #F9FAFB;
    --color-border: #E5E7EB;
    --color-border-light: #F3F4F6;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;
    
    /* Borders & Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text-primary);
    background: var(--color-background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

main {
    position: relative;
    z-index: 1;
}

/* Navigation */
.navbar {
    background: var(--color-background);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 50;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 4rem;
}

.nav-brand {
    display: flex;
    align-items: baseline;
    gap: var(--spacing-sm);
}

.logo {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-text-primary);
    letter-spacing: -0.025em;
}

.logo-subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    font-weight: 500;
}

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

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

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

.nav-cta {
    background: var(--color-accent) !important;
    color: white !important;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-weight: 600;
}

.nav-cta:hover {
    background: var(--color-accent-hover) !important;
}

/* Hero Section */
.hero {
    padding: var(--spacing-4xl) 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

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

.hero-text-center {
    text-align: center;
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 800;
    line-height: 1.1;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.025em;
}

.hero-description {
    font-size: var(--font-size-xl);
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-2xl);
}

.hero-actions {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
    justify-content: center;
}

/* Buttons */
.btn-primary {
    background: var(--color-accent);
    color: white;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 600;
    font-size: var(--font-size-base);
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    border: none;
    cursor: pointer;
}

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

.btn-secondary {
    color: var(--color-text-primary);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 600;
    font-size: var(--font-size-base);
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    border: 1px solid var(--color-border);
    background: var(--color-background);
}

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

/* Screenshots Section */
.screenshots-section {
    padding: var(--spacing-4xl) 0;
    background: var(--color-background);
}

.screenshots-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-2xl);
    margin-top: var(--spacing-3xl);
}

.screenshot-item {
    text-align: center;
    background: var(--color-background);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    border: 1px solid var(--color-border-light);
    transition: all 0.2s ease;
}

.screenshot-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-border);
}

.screenshot-mockup {
    margin-bottom: var(--spacing-lg);
    display: flex;
    justify-content: center;
}

.screenshot-mockup img {
    width: 200px;
    height: auto;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: all 0.2s ease;
}

.screenshot-mockup img:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-lg);
}

.screenshot-info h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
}

.screenshot-info p {
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* Features Section */
.features {
    padding: var(--spacing-4xl) 0;
    background: var(--color-background-secondary);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-header h2 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.025em;
}

.section-header p {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.feature-item {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--color-background);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border-light);
    transition: all 0.2s ease;
}

.feature-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-border);
}

.feature-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--spacing-lg);
    color: var(--color-accent);
}

.feature-item h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
}

.feature-item p {
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* FAQ Section */
.faq-section {
    padding: var(--spacing-4xl) 0;
    background: var(--color-background);
}

.faq-container {
    max-width: 768px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--color-border);
}

.faq-question {
    width: 100%;
    background: none;
    border: none;
    padding: var(--spacing-xl) 0;
    text-align: left;
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text-primary);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: color 0.2s ease;
}

.faq-question:hover {
    color: var(--color-accent);
}

.faq-icon {
    font-size: var(--font-size-xl);
    color: var(--color-text-muted);
    transition: transform 0.2s ease;
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
    padding: 0;
}

.faq-answer.active {
    max-height: 200px;
    padding-bottom: var(--spacing-xl);
}

.faq-answer p {
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* Contact Section */
.contact-section {
    padding: var(--spacing-4xl) 0;
    background: var(--color-background-secondary);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: start;
}

.contact-info h2 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.025em;
}

.contact-info p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
    font-size: var(--font-size-lg);
}

.info-item {
    margin-bottom: var(--spacing-md);
}

.info-item strong {
    color: var(--color-text-primary);
    font-weight: 600;
}

.info-item a {
    color: var(--color-accent);
    text-decoration: none;
}

.info-item a:hover {
    text-decoration: underline;
}

.contact-form {
    background: var(--color-background);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-md);
    transition: border-color 0.2s ease;
    background: var(--color-background);
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* App Info Section */
.app-info-section {
    padding: var(--spacing-3xl) 0;
    background: var(--color-background);
    border-top: 1px solid var(--color-border);
}

.app-details h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xl);
}

.details-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.detail-item {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--color-border-light);
}

.detail-item .label {
    color: var(--color-text-secondary);
    font-weight: 500;
}

.detail-item .value {
    color: var(--color-text-primary);
    font-weight: 600;
    text-align: right;
}

.legal-links {
    display: flex;
    gap: var(--spacing-lg);
}

.legal-links a {
    color: var(--color-accent);
    text-decoration: none;
    font-size: var(--font-size-sm);
    font-weight: 500;
}

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

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

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

.footer-brand .logo {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xs);
}

.footer-brand p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

.footer-legal p {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(17, 24, 39, 0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    background: var(--color-background);
    margin: 5% auto;
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 600px;
    position: relative;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-border);
}

.close {
    color: var(--color-text-muted);
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    transition: color 0.2s ease;
}

.close:hover {
    color: var(--color-text-primary);
}

.modal-content h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-lg);
}

.modal-content p {
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .contact-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
        text-align: center;
    }
    
    .hero-title {
        font-size: var(--font-size-4xl);
    }
    
    .screenshots-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .screenshot-mockup img {
        width: 250px;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .nav-container {
        padding: 0 var(--spacing-md);
    }
    
    .nav-links {
        gap: var(--spacing-md);
    }
    
    .nav-links a {
        font-size: var(--font-size-xs);
    }
    
    .hero {
        padding: var(--spacing-2xl) 0;
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .hero-description {
        font-size: var(--font-size-lg);
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }
    
    .screenshot-mockup img {
        width: 220px;
    }
    
    .features,
    .faq-section,
    .contact-section {
        padding: var(--spacing-2xl) 0;
    }
    
    .section-header h2 {
        font-size: var(--font-size-2xl);
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .details-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
}

@media (max-width: 480px) {
    .nav-links {
        display: none;
    }
    
    .hero-title {
        font-size: var(--font-size-2xl);
    }
    
    .screenshot-mockup img {
        width: 180px;
    }
    
    .modal-content {
        margin: 10% auto;
        padding: var(--spacing-lg);
    }
}