/* Apple-style minimalist design */
:root {
    --primary-color: #007AFF;
    --text-primary: #1D1D1F;
    --text-secondary: #86868B;
    --bg-primary: #FFFFFF;
    --bg-secondary: #F5F5F7;
    --border-color: #D2D2D7;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

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

a:hover {
    text-decoration: underline;
}

.container {
    max-width: 980px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 48px;
    max-width: 980px;
    margin: 0 auto;
    padding: 0 20px;
}

.logo {
    font-size: 21px;
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--text-primary);
    text-decoration: none;
}

.logo:hover {
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 24px;
}

.nav-links a {
    font-size: 12px;
    color: var(--text-primary);
    opacity: 0.8;
}

.nav-links a:hover {
    opacity: 1;
    text-decoration: none;
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 100px 20px;
    background-color: var(--bg-secondary);
}

.hero h1 {
    font-size: 56px;
    font-weight: 700;
    letter-spacing: -0.005em;
    margin-bottom: 16px;
}

.hero p {
    font-size: 24px;
    font-weight: 400;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.download-btn {
    display: inline-block;
    background-color: var(--primary-color);
    color: #fff;
    font-size: 17px;
    font-weight: 400;
    padding: 12px 24px;
    border-radius: 980px;
    text-decoration: none;
    transition: background-color 0.2s;
}

.download-btn:hover {
    background-color: #0071E3;
    color: #fff;
    text-decoration: none;
}

/* Features */
.features {
    padding: 100px 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    max-width: 980px;
    margin: 0 auto;
}

.feature {
    text-align: center;
    padding: 40px;
    background: var(--bg-secondary);
    border-radius: 18px;
}

.feature h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 16px;
}

.feature p {
    font-size: 17px;
    color: var(--text-secondary);
}

/* Content Pages (Privacy, Terms, Support) */
.page-header {
    text-align: center;
    padding: 80px 20px 40px;
    border-bottom: 1px solid var(--border-color);
}

.page-header h1 {
    font-size: 48px;
    font-weight: 600;
    letter-spacing: -0.005em;
}

.content-section {
    padding: 60px 0;
    max-width: 800px;
    margin: 0 auto;
}

.content-section h2 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 20px;
    margin-top: 40px;
}

.content-section h2:first-child {
    margin-top: 0;
}

.content-section p, .content-section ul {
    font-size: 17px;
    line-height: 1.6;
    color: #333;
    margin-bottom: 20px;
}

.content-section ul {
    padding-left: 20px;
}

.content-section li {
    margin-bottom: 10px;
}

/* FAQ */
.faq-item {
    border-bottom: 1px solid var(--border-color);
    padding: 24px 0;
}

.faq-item:last-child {
    border-bottom: none;
}

.faq-question {
    font-size: 19px;
    font-weight: 600;
    margin-bottom: 12px;
}

.faq-answer {
    font-size: 17px;
    color: var(--text-secondary);
}

/* Footer */
footer {
    background-color: var(--bg-secondary);
    padding: 40px 20px;
    border-top: 1px solid var(--border-color);
    margin-top: auto;
}

.footer-content {
    max-width: 980px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.footer-links {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
    flex-wrap: wrap;
    justify-content: center;
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 12px;
}

.footer-copyright {
    color: var(--text-secondary);
    font-size: 12px;
}

/* Responsive */
@media (max-width: 734px) {
    .hero h1 {
        font-size: 40px;
    }
    
    .hero p {
        font-size: 19px;
    }
    
    .page-header h1 {
        font-size: 36px;
    }
    
    .content-section {
        padding: 40px 20px;
    }
}