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

body {
    font-family: Arial, sans-serif;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid #000;
}

header h1 {
    font-size: 24px;
}

.section {
    margin-bottom: 30px;
    padding: 20px;
    border: 1px solid #000;
}

.section h2 {
    font-size: 18px;
    margin-bottom: 15px;
}

input {
    display: block;
    width: 100%;
    padding: 10px;
    margin-bottom: 10px;
    border: 1px solid #000;
    font-size: 14px;
}

button {
    border: 1px solid #000;
    padding: 10px 20px;
    cursor: pointer;
    font-size: 14px;
}

p {
    margin-top: 10px;
    font-size: 14px;
}

.app-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    margin-bottom: 10px;
    border: 1px solid #000;
}

.app-info {
    flex: 1;
}

.app-info h3 {
    font-size: 16px;
    margin-bottom: 5px;
}

.app-info p {
    font-size: 12px;
    margin: 0;
}

.download-btn {
    padding: 8px 15px;
    font-size: 12px;
}

.logout-btn {
    margin-top: 10px;
    font-size: 12px;
}

@media (max-width: 600px) {
    .container {
        margin: 10px;
        padding: 15px;
    }
    
    .section {
        padding: 15px;
    }
    
    .app-item {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .download-btn {
        margin-top: 10px;
    }
}