Notes/src/public/stylesheets/theme-next/forms.css

/*
 * Command buttons (.btn-primary / .btn-secondary / .btn-sm / .btn-success)
 */

button.btn.btn-primary,
button.btn.btn-secondary,
button.btn.btn-sm:not(.select-button),
button.btn.btn-success {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 120px;
    box-shadow: 1px 1px 1px var(--cmd-button-shadow-color);
    border: unset;
    border-radius: 6px;
    padding: 4px 16px;
    background: var(--cmd-button-background-color);
    color: var(--cmd-button-text-color);
}

button.btn.btn-primary:hover,
button.btn.btn-secondary:hover,
button.btn.btn-sm:not(.select-button):hover,
button.btn.btn-success:hover {
    background: var(--cmd-button-hover-background-color);
    color: var(--cmd-button-hover-text-color);
}

button.btn.btn-primary:active,
button.btn.btn-secondary:active,
button.btn.btn-sm:not(.select-button):active,
button.btn.btn-success:active {
    opacity: .85;
    box-shadow: unset;
    background: var(--cmd-button-background-color) !important;
    color: var(--cmd-button-text-color) !important;
    transform: scale(.95);
}

button.btn.btn-primary:disabled,
button.btn.btn-secondary:disabled,
button.btn.btn-sm:not(.select-button):disabled,
button.btn.btn-success:disabled {
    opacity: var(--cmd-button-disabled-opacity);
}

button.btn.btn-primary:focus-visible,
button.btn.btn-secondary:focus-visible,
button.btn.btn-sm:not(.select-button):focus-visible,
button.btn.btn-success:focus-visible {
    outline: 2px solid var(--input-focus-outline-color);
}

/* Button's icon */
button.btn.btn-primary span.bx,
button.btn.btn-secondary span.bx,
button.btn.btn-sm span.bx,
button.btn.btn-success span.bx {
    color: var(--cmd-button-icon-color);
    padding-right: .35em;
    font-size: 1.2em;
}

/* Button's keyboard shortcut */
button.btn.btn-primary kbd,
button.btn.btn-secondary kbd,
button.btn.btn-sm kbd,
button.btn.btn-success kbd {
    margin-left: .5em;
    background: var(--cmd-button-keyboard-shortcut-background);
    color: var(--cmd-button-keyboard-shortcut-color);
    font-size: .6em;
    text-transform: uppercase;
    letter-spacing: .5pt;
}

/*
 * Icon buttons
 */

:root .icon-action:not(.global-menu-button) {
    width: var(--icon-button-size);
    height: var(--icon-button-size);
    border: unset;
    border-radius: 8px;
    padding: 0;
    text-align: center;
    color: var(--icon-button-color);
}

/* The icon */
:root .icon-action:not(.global-menu-button)::before {
    display: block;
    line-height: var(--icon-button-size);
    font-size: calc(var(--icon-button-size) * var(--icon-button-icon-ratio));
}

:root .icon-action:not(.global-menu-button):hover,
:root .icon-action:not(.global-menu-button).show {
    background: var(--icon-button-hover-background);
    color: var(--icon-button-hover-color);
}

:root .icon-action:not(.global-menu-button):active::before {
    transform: scale(.85);
}

:root .icon-action:not(.global-menu-button):focus-visible {
    outline: 2px solid var(--input-focus-outline-color);
}

/* 
 * Input boxes
 */

input:disabled {
    opacity: .33;
}

/* Text boxes */

input:not([type]),
input[type="text"],
input[type="number"],
input[type="password"],
textarea.form-control,
textarea {
    outline: 3px solid transparent;
    outline-offset: 6px;
    border: unset;
    background: var(--input-background-color);
    color: var(--input-text-color);
}

input:not([type]):hover,
input[type="text"]:hover,
input[type="number"]:hover,
input[type="password"]:hover,
textarea.form-control:hover,
textarea:hover {
    background: var(--input-hover-background);
    color: var(--input-hover-color);
}

input:not([type]):focus,
input[type="text"]:focus,
input[type="number"]:focus,
input[type="password"]:focus,
textarea.form-control:focus,
textarea:focus {
    box-shadow: unset;
    outline: 3px solid var(--input-focus-outline-color);
    outline-offset: 0;
    background: var(--input-focus-background);
    color: var(--input-focus-color);
    transition: outline-color 50ms linear,
                outline-offset 200ms ease-out;
}

input::placeholder,
.form-control::placeholder {
    --muted-text-color: var(--input-placeholder-color);
}

input::selection,
.form-control::selection {
    background: var(--input-selection-background);
    color: var(--input-selection-text-color);
}

/* Input groups */

.input-group {
    outline: 3px solid transparent;
    outline-offset: 6px;
    background: var(--input-background-color);
    border-radius: 6px;
    padding-right: 8px;
    color: var(--quick-search-color);
}

.input-group:hover {
    background: var(--input-hover-background);
}

.input-group:focus-within {
    outline: 3px solid var(--input-focus-outline-color);
    outline-offset: 0;
    background: var(--input-focus-background);
    transition: outline-color 50ms linear,
                outline-offset 200ms ease-out;
}

.input-group input
.input-group input:hover,
.input-group input:focus,
.input-group .form-control,
.input-group .form-control:hover,
.input-group .form-control:focus {
    /* Ignore the focus outline for the inputs that are children of an input group */
    outline: unset;

    background: transparent;
}

.input-group button,
.input-group a {
    display: flex;
    --bs-border-width: 0;
    --accented-background-color: transparent;
    background: transparent;
    padding: 0 4px;
    
    /* Workaround to set the "color" property. */
    --muted-text-color: var(--input-action-button-color);
}

.input-group button:hover,
.input-group a:hover {
    --muted-text-color: var(--input-action-button-hover);
}

.input-group button:focus-visible,
.input-group a:focus-visible {
    outline: transparent;
    border: transparent;
    text-shadow: 0 0 3px var(--input-action-button-hover);
}

.input-group a.disabled {
    opacity: .5;
    /* Workaround to set the "background" property. */
    --button-disabled-background-color: transparent;
}

.input-group .input-clearer-button {
    background: transparent !important;
}

/* Combo box-like dropdown buttons */

.select-button.dropdown-toggle {
    padding-right: 40px;
}

.select-button.dropdown-toggle::after {
    /* Remove the original arrow */
    content: unset;
}

/* Combo boxes and combo box-like dropdown buttons */

select,
select.form-select,
.select-button.dropdown-toggle.btn {
    outline: 3px solid transparent;
    outline-offset: 6px;
    background: var(--input-background-color)
                var(--select-arrow-svg) right 0.75rem center/15px 20px no-repeat;
    color: var(--input-text-color);
    border: unset;
    border-radius: 0.375rem;
}

select:hover,
select.form-select:hover,
.select-button.dropdown-toggle.btn:hover {
    background-color: var(--input-hover-background);
    color: var(--input-hover-color);
}

button.select-button.dropdown-toggle.btn:active {
    background-color: transparent;
    color: var(--select-focus-text-color);
}

select:focus,
select.form-select:focus,
.select-button.dropdown-toggle.btn:focus {
    box-shadow: unset;
    outline: 3px solid var(--input-focus-outline-color);
    outline-offset: 0;
    background-color: var(--select-focus-background);
    color: var(--select-focus-text-color);
    transition: outline-color 50ms linear,
                outline-offset 200ms ease-out;
}

option {
    color: var(--select-dropdown-text-color);
}

optgroup {
    color: var(--select-group-heading-text-color);
    font-size: .75em;
    font-weight: normal;
    font-style: normal;
    line-height: 40px;
}

/* Check boxes and radio buttons */

@supports selector(label:has(*)) {

    /* Check box & radio button commons */

    /* The parent label */
    label.tn-radio,
    label.tn-checkbox {
        --box-size: 1em;
        --box-label-gap: .5em;

        position: relative;
        padding-left: calc(var(--box-size) + var(--box-label-gap)) !important;
        user-select: none;

    }

    /* The original input */
    label.tn-radio > input[type="radio"],
    label.tn-checkbox > input[type="checkbox"] {
        position: absolute;
        top: 0;
        left: 0;
        width: var(--box-size);
        height: 100%;
        opacity: 0 !important;
    }

    label.tn-radio::before,
    label.tn-radio::after,
    label.tn-checkbox::before,
    label.tn-checkbox::after {
        content: "";
        position: absolute;
        top: 50%;
        left: 0;
        translate: 0 -50%;
        width: var(--box-size);
        height: var(--box-size);
    }

    label.tn-radio:has(>input[type="radio"]:focus-visible)::before,
    label.tn-checkbox:has(>input[type="checkbox"]:focus-visible)::before {
        outline: 2px solid var(--input-focus-outline-color);
    }

    /* Check boxes */

    /* The check box background */
    label.tn-checkbox::before {
        border-radius: 3px;
        background: var(--radio-checkbox-background);
    }

    label.tn-checkbox:has(>input[type="checkbox"]:not(:disabled)):hover:before {
        background: var(--radio-checkbox-hover-background);
    }

    @keyframes checkbox-checked {
        from {
            transform: scale(2);
        } to {
            transform: scale(1);
        }
    }

    /* The tick mark */
    label.tn-checkbox::after {
        mask-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3e%3ctitle%3echeck-bold%3c/title%3e%3cpath d='M9%2c20.42L2.79%2c14.21L5.62%2c11.38L9%2c14.77L18.88%2c4.88L21.71%2c7.71L9%2c20.42Z' /%3e%3c/svg%3e");
        mask-position: center center;
        mask-size: .95em;
        background-color: var(--radio-checkbox-indicator-color);
        transform: scale(0);
        opacity: 0;
        transition: transform 300ms ease-out,
                    opacity 300ms linear;
    }

    label.tn-checkbox:has(>input[type="checkbox"]:checked)::after {
        opacity: 1;
        transform: scale(1);
        transition: opacity 100ms ease-in-out;
        animation: checkbox-checked 150ms ease-out;
    }

    /* Radio buttons */

    label.tn-radio::before,
    label.tn-radio::after {
        border-radius: 50%;
    }

    /* The outer circle */
    label.tn-radio::before {
        background: var(--radio-checkbox-background);
    }

    label.tn-radio:has(>input[type="radio"]:not(:disabled)):hover::before {
        background: var(--radio-checkbox-hover-background);
    }

    @keyframes radio-checked {
        from {
            transform: scale(1.5);
        } to {
            transform: scale(.5);
        }
    }

    /* The inner circle */
    label.tn-radio::after {
        background: var(--radio-checkbox-indicator-color);
        transform: scale(0);
        opacity: 0;
        transition: opacity 300ms linear,
                    transform 300ms ease-in;
    }

    label.tn-radio:has(>input[type="radio"]:checked)::after {
        transform: scale(.5);
        opacity: 1;
        transition: opacity 150ms linear;
        animation: radio-checked 200ms ease-out;
    }

    /* Disabled check boxes and radio buttons */

    label.tn-radio:has(> input[type="radio"]:disabled)::before,
    label.tn-radio:has(> input[type="radio"]:disabled)::after,
    label.tn-checkbox:has(> input[type="checkbox"]:disabled)::before,
    label.tn-checkbox:has(> input[type="checkbox"]:disabled)::after {
        opacity: .5;
    }

}

/* Links */

body a.tn-link,
body a.tn-link:visited,
.use-tn-links a,
.use-tn-links a:visited {
    --background: transparent;
    
    box-shadow: 0 0 0 0 var(--background);
    border-radius: 4px;
    background: var(--background);
    color: currentColor;
    font-weight: normal;
    text-decoration: underline;

    transition: background-color 200ms ease-out,
                box-shadow 200ms ease-out,
                color 300ms ease-out;
}

body a.tn-link:focus-visible,
.use-tn-links a:focus-visible {
    outline: 2px solid var(--input-focus-outline-color);
    outline-offset: 2px;
}

body a.tn-link:hover, 
.use-tn-links a:hover {
    box-shadow: 0 0 0 4px var(--link-hover-background);
    --background: var(--link-hover-background);
    color: var(--link-hover-color);

    transition: background-color 100ms ease-in,
                box-shadow 100ms ease-in,
                color 150ms ease-in;
}

a.tn-link.external:not(.no-arrow)::after,
a.tn-link[href^="http://"]:not(.no-arrow)::after,
a.tn-link[href^="https://"]:not(.no-arrow)::after,
.use-tn-links a.external:not(.no-arrow)::after,
.use-tn-links a[href^="http://"]:not(.no-arrow)::after,
.use-tn-links a[href^="https://"]:not(.no-arrow)::after {
    display: inline-block;
    opacity: .5;
}

@keyframes link-arrow-blink {
    from {
        opacity: 1;
    } to {
        opacity: .5;
    }
}

a.tn-link:hover.external:not(.no-arrow)::after,
a.tn-link:hover[href^="http://"]:not(.no-arrow)::after,
a.tn-link:hover[href^="https://"]:not(.no-arrow)::after,
.use-tn-links a:hover.external:not(.no-arrow)::after,
.use-tn-links a:hover[href^="http://"]:not(.no-arrow)::after,
.use-tn-links a:hover[href^="https://"]:not(.no-arrow)::after {
    animation: link-arrow-blink 500ms linear alternate infinite;
}