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

:root {
    --width: 1100px;
    --background: #fff;
    --color: #333;
    --button-bg: #6A1B9A;
    --button-text: #fff;
    --field-border: #E0E0E0;
    --border-radius: 0.25rem;
    --field-bg: #fff;
    --font-size: 15px;
    --font-family: system-ui, sans-serif;
}

html {
    font-size: var(--font-size);
}

body {
    font: 1rem/1.5 var(--font-family);
    background: var(--background);
    color: var(--color);
}

button {
    border: none;
    cursor: pointer;
    font-family: var(--font-family);
    font-size: inherit;
}

.btn {
    background-color: var(--button-bg);
    color: var(--button-text);
    padding: 0.65rem 1.2rem;
    border-radius: var(--border-radius);
}

input:not([type="checkbox"]) {
    display: block;
    width: 100%;
    padding: 0.8rem;
    background: var(--field-bg);
    color: inherit;
    font-family: var(--font-family);
    font-size: inherit;
    border: 1px solid var(--field-border);
    transition: border-color 450ms ease;
}

input:not([type="checkbox"]):focus {
    outline-style: none;
    border-color: var(--button-bg);
}

fieldset {
    padding: 1.5rem;
    border: 1px solid var(--field-border);
    border-radius: var(--border-radius);
}

legend {
    color: var(--color);
    font-weight: 600;
    text-transform: uppercase;
}

main {
    margin: 4rem auto;
    max-width: var(--width);
    padding: 0 1rem;
}

.form-group {
    margin-bottom: 1.2rem;
}

.form-label {
    display: block;
    margin-bottom: 0.45rem;
    font-weight: 600;
}

.form-group-check {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
}

.form-group-check .form-label {
    margin-bottom: 0;
    margin-right: 1rem;
}

.form-group-check .form-input {
    border: 1px solid var(--field-border);
    padding: 0.25rem;
    border-radius: var(--border-radius);
    appearance: none;
    width: 20px;
    height: 20px;
    cursor: pointer;
    background-color: var(--field-bg);
}

.form-group-check .form-input:checked {
    background-color: var(--button-bg);
}

.hidden {
    position: absolute;
    top: -9999em;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

.form-multistep-navigation {
    width: 100%;
    margin-bottom: 2rem;
    padding-bottom: 0.6rem;
    border-bottom: 1px solid var(--field-border);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
}

.form-nav-btn {
    background-color: transparent;
    padding-bottom: 2px;
}

.form-nav-btn.active {
    font-weight: 600;
    border-bottom: 1px solid var(--button-bg);
    color: var(--button-bg);
}

.form-message {
    border-left: 3px solid;
    padding: 1.3rem;
    font-size: 1.15rem;
    background-color: #fafafa;
    font-weight: 600;
    margin-top: 1.5rem;
}

.error {
    color: #d00;
}