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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 40px 20px;
    text-align: center;
}

.app-icon {
    width: 120px;
    height: 120px;
    border-radius: 27px;
    margin-bottom: 20px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    font-weight: bold;
}

.subtitle {
    font-size: 1.2em;
    opacity: 0.95;
    color: white;
}

main {
    padding: 40px 30px;
}

section {
    margin-bottom: 40px;
}

section:last-child {
    margin-bottom: 0;
}

h2 {
    color: #667eea;
    font-size: 1.8em;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 3px solid #667eea;
}

h3 {
    color: #764ba2;
    font-size: 1.3em;
    margin-bottom: 10px;
    margin-top: 20px;
}

p {
    margin-bottom: 15px;
    color: #555;
    font-size: 1.05em;
}

ul {
    margin-left: 20px;
    margin-bottom: 15px;
}

li {
    margin-bottom: 8px;
    color: #555;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.feature {
    background: #f8f9fa;
    padding: 25px;
    border-radius: 15px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.3);
}

.feature h3 {
    margin-top: 0;
    font-size: 1.4em;
}

.button {
    display: inline-block;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 15px 30px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: bold;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    margin-top: 10px;
}

.button:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.app-store-badge {
    display: inline-block;
    margin-top: 15px;
}

.app-store-badge img {
    height: 50px;
    transition: transform 0.3s ease;
}

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

.privacy-link {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #ddd;
}

.privacy-link a {
    color: #667eea;
    text-decoration: none;
    font-weight: bold;
}

.privacy-link a:hover {
    text-decoration: underline;
}

.back-link {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #ddd;
}

.back-link a {
    color: #667eea;
    text-decoration: none;
    font-weight: bold;
}

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

footer {
    background: #f8f9fa;
    padding: 20px;
    text-align: center;
    color: #777;
    font-size: 0.9em;
}

a {
    color: #667eea;
}

a:hover {
    color: #764ba2;
}

/* Responsive design */
@media (max-width: 600px) {
    body {
        padding: 10px;
    }

    header {
        padding: 30px 15px;
    }

    header h1 {
        font-size: 2em;
    }

    .subtitle {
        font-size: 1em;
    }

    main {
        padding: 30px 20px;
    }

    h2 {
        font-size: 1.5em;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }
}