/* OneOhOne Website Styles
   Matching the iOS app's elegant, minimal aesthetic */

:root {
    /* Light mode colors (default) */
    --background: #FAFAFA;
    --card-background: #FFFFFF;
    --primary-text: #1A1A1A;
    --secondary-text: #6B6B6B;
    --tertiary-text: #9B9B9B;
    --border: #E5E5E5;
    --button-bg: #1A1A1A;
    --button-text: #FFFFFF;
    --accent: #34C759;

    /* Spacing */
    --max-width: 800px;
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 40px;
    --spacing-xl: 64px;
}

/* Dark mode */
@media (prefers-color-scheme: dark) {
    :root {
        --background: #0A0A0A;
        --card-background: #1A1A1A;
        --primary-text: #FFFFFF;
        --secondary-text: rgba(255, 255, 255, 0.6);
        --tertiary-text: rgba(255, 255, 255, 0.35);
        --border: rgba(255, 255, 255, 0.15);
        --button-bg: #FFFFFF;
        --button-text: #000000;
    }
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--background);
    color: var(--primary-text);
    line-height: 1.6;
    min-height: 100vh;
}

/* Typography */
h1 {
    font-size: 2.5rem;
    font-weight: 300;
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-md);
}

h2 {
    font-size: 1.75rem;
    font-weight: 400;
    letter-spacing: -0.01em;
    margin-bottom: var(--spacing-sm);
}

h3 {
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

p {
    color: var(--secondary-text);
    margin-bottom: var(--spacing-sm);
}

a {
    color: var(--primary-text);
    text-decoration: none;
    transition: opacity 0.2s ease;
}

a:hover {
    opacity: 0.7;
}

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

/* Header */
header {
    padding: var(--spacing-lg) var(--spacing-md);
    text-align: center;
    border-bottom: 1px solid var(--border);
}

.logo {
    font-size: 2rem;
    font-weight: 300;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-xs);
}

.tagline {
    color: var(--secondary-text);
    font-size: 1.125rem;
    font-weight: 300;
}

/* Navigation */
nav {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) 0;
    margin-top: var(--spacing-sm);
}

nav a {
    color: var(--secondary-text);
    font-size: 0.875rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 8px;
    transition: all 0.2s ease;
}

nav a:hover {
    color: var(--primary-text);
    background-color: var(--border);
    opacity: 1;
}

/* Hero Section */
.hero {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.hero p {
    font-size: 1.25rem;
    max-width: 600px;
    margin: 0 auto var(--spacing-lg);
}

/* App Store Badge */
.app-store-badge {
    display: inline-block;
    margin-top: var(--spacing-md);
}

.app-store-badge img {
    height: 54px;
    transition: transform 0.2s ease;
}

.app-store-badge:hover img {
    transform: scale(1.05);
}

/* Features Section */
.features {
    padding: var(--spacing-xl) var(--spacing-md);
    border-top: 1px solid var(--border);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    max-width: var(--max-width);
    margin: 0 auto;
}

.feature {
    text-align: center;
    padding: var(--spacing-md);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.feature h3 {
    margin-bottom: var(--spacing-xs);
}

.feature p {
    font-size: 0.9375rem;
}

/* App Screenshots */
.screenshots {
    padding: var(--spacing-xl) var(--spacing-md);
    text-align: center;
    border-top: 1px solid var(--border);
    background: linear-gradient(180deg, var(--background) 0%, var(--card-background) 100%);
}

.screenshots h2 {
    margin-bottom: var(--spacing-lg);
}

.screenshot-container {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    max-width: 1200px;
    margin: 0 auto;
}

.screenshot {
    width: 220px;
    border-radius: 24px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.12);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.screenshot:hover {
    transform: translateY(-8px);
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.18);
}

.screenshot img {
    width: 100%;
    display: block;
}

@media (max-width: 960px) {
    .screenshot {
        width: 180px;
    }
}

@media (max-width: 640px) {
    .screenshot {
        width: 140px;
        border-radius: 16px;
    }

    .screenshot-container {
        gap: var(--spacing-sm);
    }
}

/* How It Works */
.how-it-works {
    padding: var(--spacing-xl) var(--spacing-md);
    border-top: 1px solid var(--border);
}

.how-it-works h2 {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.steps {
    max-width: 600px;
    margin: 0 auto;
}

.step {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    align-items: flex-start;
}

.step-number {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--button-bg);
    color: var(--button-text);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    flex-shrink: 0;
}

.step-content h3 {
    margin-bottom: 4px;
}

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

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

.footer-links a {
    color: var(--secondary-text);
    font-size: 0.875rem;
}

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

.copyright {
    color: var(--tertiary-text);
    font-size: 0.8125rem;
}

/* Legal Pages */
.legal {
    padding: var(--spacing-xl) var(--spacing-md);
}

.legal h1 {
    margin-bottom: var(--spacing-xs);
}

.legal .last-updated {
    color: var(--tertiary-text);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-lg);
}

.legal h2 {
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    font-size: 1.375rem;
}

.legal h3 {
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
    font-size: 1.125rem;
}

.legal p, .legal li {
    color: var(--secondary-text);
    margin-bottom: var(--spacing-sm);
}

.legal ul, .legal ol {
    padding-left: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.legal li {
    margin-bottom: var(--spacing-xs);
}

.legal a {
    color: var(--primary-text);
    text-decoration: underline;
}

/* Back link */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--secondary-text);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-md);
}

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

/* Responsive */
@media (max-width: 640px) {
    h1 {
        font-size: 2rem;
    }

    .hero h1 {
        font-size: 2.25rem;
    }

    .hero p {
        font-size: 1.125rem;
    }

    nav {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-xs);
    }

    .step {
        flex-direction: column;
        text-align: center;
        align-items: center;
    }
}