:root {
    --elf-background-color: #fafafa;
    --elf-primary-color: #333333;
    --elf-secondary-color: #eeeeee;

    --elf-accent-light-color: #d2caef;
    --elf-accent-color: #8f83ed;
    --elf-accent-text-color: #6f63cf;

    --elf-neutral-light-color: #b9b9b9;
    --elf-neutral-color: #7f7f7f;
    --elf-neutral-text-color: #333333;

    --elf-input-border-color: #b9b9b9;
    --elf-input-background: #ffffff;
    --elf-radio-button-background: #ffffff;
}

@media (prefers-color-scheme: dark) {
    :root {
        --elf-background-color: #131313;
        --elf-primary-color: #eeeeee;
        --elf-secondary-color: #333333;

        --elf-accent-light-color: #b0e9d5;
        --elf-accent-color: #00a97d;
        --elf-accent-text-color: #1a9473;

        --elf-input-border-color: #7f7f7f;
        --elf-input-background: #414141;
        --elf-radio-button-background: #414141;
    }

    .radio-button img {
        filter: invert(1);
    }
}

* {
    font-family: "Quicksand", sans-serif;
    font-weight: 600;
    box-sizing: border-box;
}

body {
    display: flex;
    flex-direction: column;
    align-items: center;
    font-size: var(--text-base);
    padding: 20px 12px;
    margin: 0;
    color: var(--elf-primary-color);
    background-color: var(--elf-background-color);
}

a {
    text-decoration: none;
    color: var(--elf-accent-text-color);
}

button {
    --elf-btn-background: var(--elf-accent-light-color);
    --elf-btn-shadow: var(--elf-accent-color);
    --elf-btn-color: var(--elf-accent-text-color);

    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    margin-right: 4px;
    background: var(--elf-btn-background);
    color: var(--elf-btn-color);
    border-radius: 6px;
    border: none;
    box-shadow: 4px 4px 1px 0px var(--elf-btn-shadow);
    transition: all 0.2s;
    outline: none;
    text-decoration: none;
    user-select: none;

    width: 70px;
    padding: 10px 6px;
    font-size: var(--text-sm);
}

button:hover {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 1px 0px var(--elf-btn-shadow);
}

button:active {
    transform: translate(3px, 3px);
    box-shadow: none;
}

button.button-neutral {
    --elf-btn-background: var(--elf-neutral-light-color);
    --elf-btn-shadow: var(--elf-neutral-color);
    --elf-btn-color: var(--elf-neutral-text-color);
}

.param-label {
    font-size: var(--text-sm);
}

input[type="text"],
input[type="number"],
textarea {
    width: 100%;
    max-width: 350px;
    padding: 10px;
    border: 1px solid var(--elf-input-border-color);
    border-radius: 6px;
    outline-color: var(--elf-accent-light-color);
    background: var(--elf-input-background);
    color: var(--elf-primary-color);
    text-align: center;
}

textarea {
    min-height: 60px;
    resize: vertical;
}

input[type="file"] {
    padding: 10px;
}

input[type="file"]::file-selector-button {
    border: none;
    font-family: "Quicksand", sans-serif;
    font-weight: 600;
    background: var(--elf-neutral-light-color);
    color: var(--elf-neutral-text-color);
    border-radius: 4px;
    font-size: var(--text-sm);
    padding: 4px 8px;
    cursor: pointer;
}

.param-group {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: var(--gap-2);
    padding: 10px;
    border-radius: 6px;
    background: var(--elf-background-color);
    justify-content: center;
}

.radio-button {
    padding: 6px;
    border-radius: 6px;
    cursor: pointer;
    border: 3px solid var(--elf-secondary-color);
    background: var(--elf-radio-button-background);
    color: var(--elf-primary-color);
}

.radio-button input {
    display: none;
}

.radio-button:has(input:checked) {
    border-color: var(--elf-accent-text-color);
}

.radio-button img {
    display: block;
    width: 40px;
}

.radio-button-group {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--gap-2);
    width: 100%;
}

.qr-code-preview {
    display: flex;
    justify-content: center;
    gap: var(--gap-3);
    max-width: 100%;
    position: sticky;
    top: 0;
    z-index: 99999;
    background: var(--elf-background-color);
    width: 100%;
    box-shadow: 0px 4px 10px var(--elf-background-color);
    padding: 16px;
    align-items: center;
}

.qr-code-container {
    width: 120px;
    max-width: 100%;
    border-radius: 8px;
    padding: 8px;
    background-color: var(--elf-accent-light-color);
}

.qr-code-container > * {
    width: 100%;
    height: 100%;
    background-color: #ffffff;
    display: block;
}

.qr-code-container img {
    width: 100%;
    height: 100%;
}

.qr-code-params {
    display: flex;
    justify-content: center;
    flex-direction: column;
    gap: var(--gap-4);
    background-color: var(--elf-secondary-color);
    border-radius: 10px;
    padding: 20px;
    margin-top: 10px;
    width: 100%;
    max-width: 700px;
}

.advanced-settings {
    width: 100%;
}

.advanced-params-toggle {
    cursor: pointer;
    position: relative;
}

.advanced-params-toggle:after {
    content: "\2335";
    font-weight: bold;
    transition: transform 0.3s;
    right: 4px;
    position: absolute;
}

.advanced-params-toggle.active:after {
    transform: scale(-1, -1);
}

.advanced-params-wrapper {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.advanced-params {
    display: flex;
    align-items: center;
    flex-direction: column;
    gap: 16px;
    margin-top: 16px;
}

@media (min-width: 375px) {
    .qr-code-container {
        width: 160px;
        padding: 10px;
    }
}

@media (min-width: 480px) {
    .qr-code-container {
        width: 200px;
        padding: 12px;
    }

    button {
        padding: 12px 8px;
        width: 80px;
        font-size: var(--text-base);
    }

    .qr-code-preview {
        gap: calc(var(--gap-4));
    }
}

@media (min-width: 640px) {
    .qr-code-container {
        width: 260px;
        padding: 16px;
    }
}