HTMLify

@charset "UTF-8";

body {
    font-size: 10px;
    font-family: Roboto, sans-serif;
    background-color: #ff7b73;
    margin: 0;
    display: grid;
    height: 100vh;
    place-items: center;
}

.c-checkbox {
    display: none;
}

.c-checkbox:checked+.c-formContainer .c-form {
    width: 37.5em;
}

.c-checkbox:checked+.c-formContainer .c-form__toggle {
    visibility: hidden;
    opacity: 0;
    transform: scale(0.7);
}

.c-checkbox:checked+.c-formContainer .c-form__input,
.c-checkbox:checked+.c-formContainer .c-form__buttonLabel {
    transition: 0.2s 0.1s;
    visibility: visible;
    opacity: 1;
    transform: scale(1);
}

.c-checkbox:not(:checked)+.c-formContainer .c-form__input:required:valid~.c-form__toggle::before,
.c-checkbox:checked+.c-formContainer .c-form__input:required:valid~.c-form__toggle::before {
    content: "Thank You! 😊";
}

.c-checkbox:not(:checked)+.c-formContainer .c-form__input:required:valid~.c-form__toggle {
    pointer-events: none;
    cursor: default;
}

.c-formContainer,
.c-form,
.c-form__toggle {
    width: 20em;
    height: 6.25em;
}

.c-formContainer {
    position: relative;
    font-weight: 700;
}

.c-form,
.c-form__toggle {
    position: absolute;
    border-radius: 6.25em;
    background-color: #ffffff;
    transition: 0.2s;
}

.c-form {
    left: 50%;
    transform: translateX(-50%);
    padding: 0.625em;
    box-sizing: border-box;
    box-shadow: 0 0.125em 0.3125em rgba(0, 0, 0, 0.3);
    display: flex;
    justify-content: center;
}

.c-form__toggle {
    color: #ff7b73;
    top: 0;
    cursor: pointer;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.c-form__toggle::before {
    font-size: 1.75em;
    content: attr(data-title);
}

.c-form__input,
.c-form__button {
    font: inherit;
    border: 0;
    outline: 0;
    border-radius: 5em;
    box-sizing: border-box;
}

.c-form__input,
.c-form__buttonLabel {
    font-size: 1.75em;
    opacity: 0;
    visibility: hidden;
    transform: scale(0.7);
    transition: 0s;
}

.c-form__input {
    color: #ffcccc;
    height: 100%;
    width: 100%;
    padding: 0 0.714em;
}

.c-form__input::placeholder {
    color: currentColor;
}

.c-form__input:required:valid {
    color: #ff7b73;
}

.c-form__input:required:valid+.c-form__buttonLabel {
    color: #ffffff;
}

.c-form__input:required:valid+.c-form__buttonLabel::before {
    pointer-events: initial;
}

.c-form__buttonLabel {
    color: #ffaea9;
    height: 100%;
    width: auto;
}

.c-form__buttonLabel::before {
    content: "";
    position: absolute;
    width: 100%;
    height: 100%;
    pointer-events: none;
    cursor: pointer;
}

.c-form__button {
    color: inherit;
    padding: 0;
    height: 100%;
    width: 5em;
    background-color: #ff7b73;
}