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

:root {
    /* Colors sampled from app icon */
    --color-coral: #F87171;
    --color-rose: #E11D48;
    --color-lavender: #C4B5FD;
    --color-purple: #A78BFA;

    /* Theme colors */
    --color-bg: #fafafa;
    --color-text: #1a1a1a;
    --color-text-secondary: #666;
    --color-accent: var(--color-rose);
    --color-accent-hover: #BE185D;
    --color-accent-light: var(--color-coral);
    --color-card-bg: #ffffff;
    --color-border: #e5e5e5;
    --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --max-width: 800px;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 4rem;
}

@media (prefers-color-scheme: dark) {
    :root {
        --color-bg: #1a1a1a;
        --color-text: #f5f5f5;
        --color-text-secondary: #b0b0b0; /* Improved contrast */
        --color-accent: #FB7185; /* Lighter coral for better contrast */
        --color-accent-hover: #FB923C;
        --color-accent-light: var(--color-lavender);
        --color-card-bg: #2a2a2a;
        --color-border: #3a3a3a;
    }
}

html {
    font-size: 16px;
    line-height: 1.6;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-text);
    padding: var(--spacing-md);
}

main {
    max-width: var(--max-width);
    margin: 0 auto;
}

/* Focus styles for accessibility */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.app-store-badge:focus-visible,
.support-link:focus-visible {
    outline: 3px solid var(--color-accent-light);
    outline-offset: 3px;
    border-radius: 8px;
}

/* Headings */
h1, h2, h3 {
    line-height: 1.2;
}

/* Hero */
.hero {
    text-align: center;
    padding: calc(var(--spacing-xl) + var(--spacing-lg)) 0 var(--spacing-xl);
    background: linear-gradient(180deg, var(--color-bg) 0%, transparent 100%);
}

.app-icon {
    width: 120px;
    height: 120px;
    margin: 0 auto var(--spacing-lg);
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.app-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.tagline {
    font-size: 1.375rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

/* App Store Badge */
.app-store-badge {
    display: inline-block;
    transition: transform 0.2s ease, opacity 0.2s ease;
}

.app-store-badge img {
    height: 54px;
    width: auto;
}

.app-store-badge:hover {
    transform: translateY(-2px);
    opacity: 0.9;
}

/* Legacy download button (kept for compatibility) */
.download-button {
    display: inline-block;
    background: linear-gradient(135deg, var(--color-coral), var(--color-rose));
    color: white;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: 0 4px 12px rgba(225, 29, 72, 0.3);
}

.download-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(225, 29, 72, 0.4);
}

/* Sections */
section {
    padding: var(--spacing-xl) 0;
    border-top: 1px solid var(--color-border);
}

h2 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

/* Features */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-lg);
}

.feature {
    background: var(--color-card-bg);
    padding: var(--spacing-lg);
    border-radius: 12px;
    border: 1px solid var(--color-border);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.feature:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

@media (prefers-color-scheme: dark) {
    .feature:hover {
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    }
}

.feature-icon {
    margin-bottom: var(--spacing-md);
    color: var(--color-accent);
}

.feature-icon svg {
    display: block;
}

.feature h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.feature p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

/* Screenshots Gallery */
.screenshots {
    padding: var(--spacing-xl) 0;
    border-top: 1px solid var(--color-border);
    overflow: hidden;
    position: relative;
}

/* Scroll fade indicator */
.screenshots::after {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 60px;
    height: 60%;
    background: linear-gradient(to right, transparent, var(--color-bg));
    pointer-events: none;
    z-index: 1;
}

.screenshot-scroll {
    display: flex;
    gap: var(--spacing-lg);
    overflow-x: auto;
    padding: var(--spacing-md);
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
}

.screenshot-scroll::-webkit-scrollbar {
    height: 8px;
}

.screenshot-scroll::-webkit-scrollbar-track {
    background: var(--color-border);
    border-radius: 4px;
}

.screenshot-scroll::-webkit-scrollbar-thumb {
    background: var(--color-accent);
    border-radius: 4px;
}

.screenshot {
    flex: 0 0 auto;
    scroll-snap-align: center;
}

.screenshot img {
    height: 500px;
    width: auto;
    border-radius: 32px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
}

.screenshot-placeholder {
    height: 500px;
    width: 231px; /* iPhone aspect ratio */
    border-radius: 32px;
    background: linear-gradient(135deg, var(--color-lavender), var(--color-purple));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 500;
    text-align: center;
    padding: var(--spacing-lg);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
}

/* Promotional screenshots */
.screenshot.promo img {
    height: 450px;
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

/* Principles */
.principles ul {
    list-style: none;
    max-width: 600px;
    margin: 0 auto;
}

.principles li {
    padding: var(--spacing-md) var(--spacing-sm);
    border-bottom: 1px solid var(--color-border);
}

.principles li:last-child {
    border-bottom: none;
}

.principles strong {
    color: var(--color-accent);
}

/* Support */
.support {
    text-align: center;
}

.support p {
    margin-bottom: var(--spacing-md);
    color: var(--color-text-secondary);
}

.support-link {
    display: inline-block;
    background-color: var(--color-card-bg);
    color: var(--color-accent);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    border: 2px solid var(--color-accent);
    transition: all 0.2s ease;
}

.support-link:hover {
    background: linear-gradient(135deg, var(--color-coral), var(--color-rose));
    color: white;
    border-color: transparent;
}

.email-contact {
    margin-top: var(--spacing-lg);
    font-size: 0.9rem;
}

.email-contact a {
    color: var(--color-accent);
}

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

footer nav {
    margin-bottom: var(--spacing-md);
}

footer nav a {
    color: var(--color-accent);
    text-decoration: none;
}

footer nav a:hover {
    text-decoration: underline;
}

.copyright {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}

.company-logo {
    margin-bottom: var(--spacing-lg);
}

.company-logo img {
    height: 80px;
    width: auto;
    opacity: 0.85;
    filter: grayscale(20%);
    transition: opacity 0.2s ease, filter 0.2s ease;
}

.company-logo img:hover {
    opacity: 1;
    filter: grayscale(0%);
}

/* Mobile Responsiveness */
@media (max-width: 600px) {
    .hero {
        padding: var(--spacing-xl) 0;
    }

    .app-store-badge img {
        height: 48px;
    }

    .download-button {
        display: block;
        text-align: center;
        padding: var(--spacing-md);
    }

    .principles li {
        padding: var(--spacing-md) var(--spacing-sm);
    }

    .screenshot img {
        height: 420px;
    }

    h1 {
        font-size: 2rem;
    }

    .tagline {
        font-size: 1.125rem;
    }
}

/* Privacy page specific */
.privacy-content {
    max-width: 700px;
    margin: 0 auto;
    padding: var(--spacing-lg) 0;
}

.privacy-content h1 {
    font-size: 2rem;
    text-align: left;
    margin-bottom: var(--spacing-sm);
}

.privacy-content .effective-date {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
}

.privacy-content h2 {
    font-size: 1.25rem;
    text-align: left;
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
}

.privacy-content h3 {
    font-size: 1.1rem;
    text-align: left;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    color: var(--color-accent);
}

.privacy-content p {
    margin-bottom: var(--spacing-md);
}

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

.privacy-content li {
    margin-bottom: var(--spacing-sm);
}

.privacy-content a {
    color: var(--color-accent);
}

.back-link {
    display: inline-block;
    margin-bottom: var(--spacing-lg);
    color: var(--color-accent);
    text-decoration: none;
}

.back-link:hover {
    text-decoration: underline;
}

.closing-note {
    font-style: italic;
    color: var(--color-text-secondary);
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}