XWdRavX

index.html

<div class="phone">
    <div class="content">
        <button type="button" class="cta">
            Call to action
            <div class="circle"></div>
        </button>
        <div class="sheet">
            <div class="header">
                Some Info
            </div>
            <div class="footer">
                Some Other Info
            </div>
        </div>
    </div>
</div>

script.babel

const content = document.querySelector(".content");
const cta = document.querySelector("button");
const sheet = document.querySelector(".sheet");

cta.addEventListener("click", () => {
    content.classList.add("isActive");
});

sheet.addEventListener("click", () => {
    content.classList.remove("isActive");
});

style.scss

body {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    font-family: "Montserrat", sans-serif;
}

* {
    font-family: "Montserrat", sans-serif;
}

.phone {
    height: (1792px / 2);
    width: (828px / 2);
    border: 20px solid black;
    border-radius: 60px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.content {
    flex: 1;
    position: relative;
}

.cta {
    position: absolute;
    bottom: 20px;
    right: 20px;
    appearance: none;
    background-color: red;
    border: none;
    color: white;
    padding: 8px 20px;
    border-radius: 100px;

    &:focus {
        outline: none;
    }

    &::before {
        content: "";
        position: absolute;
        bottom: calc(50% - (1920px / 2));
        left: calc(50% - (1920px / 2));
        width: 1920px;
        height: 1920px;
        background-color: red;
        border-radius: 100%;
        z-index: -1;
        transform: scale(0);
        transition: transform 350ms cubic-bezier(0.32, 0, 0.67, 0);
    }
}

.isActive .cta::before {
    transform: scale(1);
}

.sheet {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background-color: rgba(red, 0);
    pointer-events: none;
    transition: background-color 200ms linear 150ms;
}

.header,
.footer {
    position: absolute;
    right: 0;
    left: 0;
    padding: 30px;
    background-color: white;
    transition: transform 250ms ease-in;
}

.header {
    top: 0;
    transform: translateY(-100%);
}

.footer {
    bottom: 0;
    transform: translateY(100%);
}

.isActive {
    .sheet {
        background-color: rgba(red, 1);
        pointer-events: auto;
        transition: background-color 200ms linear 200ms;
    }

    .header,
    .footer {
        transform: translateY(0);
        transition: transform 250ms cubic-bezier(0.33, 1, 0.68, 1) 300ms;
    }
}

xwdravx.markdown

XWdRavX

A Pen by Mark Thomes on CodePen.

License.