accounts-frontend/src/components/ui/form.scss

@import '~components/ui/colors.scss';
@import '~components/ui/fonts.scss';

@mixin form-transition() {
    // Анимация фона должна быть быстрее анимации рамки, т.к. визуально фон заполняется медленнее
    transition: border-color .25s,
                background-color .20s;
}

/**
 * Input
 */
@mixin input-theme($themeName, $color) {
    .#{$themeName}TextField {
        composes: textField;

        &:focus {
            border-color: $color;

            ~ .formFieldIcon {
                background: $color;
                border-color: $color;
            }
        }
    }
}

.formRow {
    position: relative;
    height: 50px;
    max-width: 100%;
    margin: 10px 0;
}

.formIconRow {
    composes: formRow;

    .textField {
        padding-left: 60px;
    }
}

.textField {
    box-sizing: border-box;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    height: 50px;
    width: 100%;

    border: 2px solid lighter($black);
    background: $black;

    font-size: 18px;
    color: #aaa;
    font-family: $font-family-title;
    padding: 0 10px;

    transition: border-color .25s;

    &::placeholder {
        opacity: 1;
        color: #444;
    }

    &:hover {
        &,
        ~ .formFieldIcon {
            border-color: #aaa;
        }
    }

    &:focus {
        color: #fff;
        outline: none;

        ~ .formFieldIcon {
            color: #fff;
        }
    }
}


.formFieldIcon {
    box-sizing: border-box;
    position: absolute;
    left: 0;
    top: 0;
    height: 50px;
    width: 50px;
    line-height: 46px;
    text-align: center;
    border: 2px solid lighter($black);
    color: #444;
    cursor: default;

    @include form-transition();
}

@include input-theme('green', $green);
@include input-theme('blue', $blue);
@include input-theme('red', $red);
@include input-theme('darkBlue', $dark_blue);
@include input-theme('lightViolet', $light_violet);


/**
 * Checkbox
 */
@mixin checkbox-theme($themeName, $color) {
    .#{$themeName}CheckboxRow {
        composes: checkboxRow;

        .checkboxContainer {
            &:hover {
                .checkbox {
                    border-color: $color;
                }
            }
        }

        .checkboxInput {
            &:checked {
                + .checkbox {
                    background: $color;
                    border-color: $color;
                }
            }
        }
    }
}

.checkboxRow {
    height: 22px;
    margin-top: 15px;
}

.checkboxContainer {
    display: inline-block;
    position: relative;
    padding-left: 27px;

    font-family: $font-family-title;
    font-size: 16px;
    line-height: 24px;
    color: #fff;

    cursor: pointer;
}

.checkboxPosition {
    position: absolute;
    box-sizing: border-box;
    left: 0;
    top: 0;
    margin: 0;

    width: 22px;
    height: 22px;
}

.checkboxInput {
    composes: checkboxPosition;
    opacity: 0;

    &:checked {
        + .checkbox {
            &:before {
                opacity: 1;
            }
        }
    }
}

.checkbox {
    composes: checkboxPosition;
    composes: checkmark from './icons.scss';

    border: 2px #dcd8cd solid;

    font-size: 10px;
    line-height: 18px;

    @include form-transition();

    &:before {
        opacity: 0;
        transition: opacity 0.3s;
    }
}

@include checkbox-theme('green', $green);
@include checkbox-theme('blue', $blue);
@include checkbox-theme('red', $red);

/**
 * Form validation
 */

.formTouched .textField:invalid {
    box-shadow: none;

    &,
    ~ .formFieldIcon {
        border-color: #3e2727;
    }

    ~ .formFieldIcon {
        color: #3e2727;
    }

    &:hover {
        &,
        ~ .formFieldIcon {
            border-color: $red;
        }
    }

    &:focus {
        border-color: $red;

        ~ .formFieldIcon {
            background: $red;
            border-color: $red;
            color: #fff;
        }
    }
}

.formTouched .checkboxInput:invalid {
    ~ .checkbox {
        border-color: $red;
    }
}