:root {
    --primary-color: #4CAF50;
    --primary-color-hover: #388E3C;
    --secondary-color: #2C3E50;
    --text-color: #ffffff;
    --background-color: #161718;
    --container-bg-color: #ffffff;

    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;

    --border-radius: 10px;
    --font-size-large: 26px;
    --font-size-medium: 18px;
    --padding: 25px;
    --input-padding: 12px;
    --width-max: 1200px;
    --width-form-container: 40%;
    --width-graph-container: 50%;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: var(--font-family);
}

body {
    background-color: var(--background-color);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 80%;
    max-width: var(--width-max);
}

.graph-container {
    width: var(--width-graph-container);
    display: flex;
    justify-content: center;
    align-items: center;
}

.graph-container img {
    width: 800px;
    height: auto;
    border-radius: var(--border-radius);
}

.container {
    background-color: var(--container-bg-color);
    padding: var(--padding);
    border-radius: var(--border-radius);
    width: var(--width-form-container);
    text-align: center;
}

h1 {
    margin-bottom: var(--padding);
    font-size: var(--font-size-large);
    color: var(--secondary-color);
}

.form-group {
    margin-bottom: 20px;
    text-align: left;
}

label {
    font-size: var(--font-size-medium);
    margin-bottom: 8px;
    display: block;
    color: var(--secondary-color);
}

select {
    width: 100%;
    padding: var(--input-padding);
    font-size: var(--font-size-medium);
    border: 1px solid #bdc3c7;
    border-radius: 6px;
    background-color: #ffffff;
    color: var(--secondary-color);
}

button {
    width: 100%;
    padding: var(--input-padding);
    background-color: var(--primary-color);
    color: var(--text-color);
    border: none;
    border-radius: 6px;
    font-size: var(--font-size-medium);
    cursor: pointer;
}

button:hover {
    background-color: var(--primary-color-hover);
}

.result-container {
    margin-top: var(--padding);
    font-size: var(--font-size-medium);
    color: var(--secondary-color);
}

@media screen and (max-width: 1080px){
    .graph-container img {
        width: 600px;
    }
}

@media screen and (max-width: 768px) {
    .wrapper {
        flex-direction: column;
    }

    .graph-container {
        width: 100%;
        margin-bottom: var(--padding);
    }

    .container {
        width: 100%;
    }

    .graph-container img {
        max-width: 100%;
    }
}