:root {
    --primary-color: #007AFF;
    --background-color: #F5F5F7;
    --text-color: #1D1D1F;
    --secondary-text: #86868B;
    --card-background: #FFFFFF;
}

@media (prefers-color-scheme: dark) {
    :root {
        --primary-color: #0A84FF;
        --background-color: #000000;
        --text-color: #F5F5F7;
        --secondary-text: #86868B;
        --card-background: #1C1C1E;
    }
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.5;
    margin: 0;
    padding: 0;
}

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

header {
    text-align: center;
    padding: 60px 20px;
}

.app-logo {
    width: 120px;
    height: 120px;
    border-radius: 24px;
    margin-bottom: 20px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 10px;
}

h2 {
    font-size: 32px;
    font-weight: 600;
    margin-top: 40px;
    margin-bottom: 20px;
}

.subtitle {
    font-size: 24px;
    color: var(--secondary-text);
    max-width: 600px;
    margin: 0 auto 30px;
}

.download-badge {
    display: inline-block;
    background-color: var(--text-color);
    color: var(--background-color);
    padding: 12px 24px;
    border-radius: 40px;
    text-decoration: none;
    font-weight: 600;
    font-size: 18px;
    transition: opacity 0.2s;
}

.download-badge:hover {
    opacity: 0.8;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin: 40px 0;
}

.feature-card {
    background: var(--card-background);
    padding: 24px;
    border-radius: 18px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.feature-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--primary-color);
}

.contact-section {
    text-align: center;
    background: var(--card-background);
    padding: 40px;
    border-radius: 20px;
    margin: 40px 0;
}

.email-link {
    font-size: 20px;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

footer {
    text-align: center;
    padding: 40px;
    color: var(--secondary-text);
    font-size: 14px;
    border-top: 1px solid var(--secondary-text);
    opacity: 0.5;
}

footer a {
    color: var(--secondary-text);
    margin: 0 10px;
    text-decoration: none;
}

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