style.css

/* global setting */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background: #000;
    color: #fff;
    font-weight: 500;
    font-family: Arial, sans-serif;
}

ul {
    list-style: none;
}

.lg {
    font-size: 1.5rem;
}

/* button style */
.btn {
    text-decoration: none;
    color: #fff;
    padding: 10px 20px;
    background: #e50914;
    border-radius: 5px;
    font-size: 1.1rem;
    text-align: center;
}

.btn-lg {
    text-decoration: none;
    color: #fff;
    padding: 10px 15px;
    margin: 0;
    background: #e50914;
    border-radius: 5px;
    font-size: 25px;
    text-align: center;
}

.btn-lg:hover {
    background: #fd1c27;
}

/* inner container title and text style */

.inner-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 1;
    line-height: 1.25;
}

.inner-title {
    font-size: 1.8rem;
    width: 90%;
}

.inner-title h1 {
    margin-bottom: 1rem;
}

.inner-text {
    font-size: 1.5rem;
    width: 90%;
}

/* email form */

.email-form {
    margin: 1rem;
}

.email-form .get-started {
    padding-top: 1rem;
    display: flex;
    height: 80%;
}

.email-form .get-started>input {
    border-radius: 2px 0 0 2px;
    border: 3px solid #333;
    padding-left: 10px;
    font-size: 1.1rem;
    outline: none;
    flex: 1;
}

.email-form .btn-lg {
    border-radius: 0 2px 2px 0;
}

/* header */
.header {
    height: 110vh;
    position: relative;
    background: url("https://assets.nflxext.com/ffe/siteui/vlv3/8ef88e03-6f89-4c75-ae51-f8da7d252358/6ac07e5f-07ca-4543-8540-f22edce8bb02/TW-en-20210208-popsignuptwoweeks-perspective_alpha_website_small.jpg") no-repeat center center/cover;
    box-shadow: inset 0 50px 300px #000, inset 0 -50px 300px #000;
    border-bottom: 10px #333 solid;
}

/* brightness and vignette effect*/
.overlay {
    height: 100%;
    width: 100%;
    background: #000;
    position: absolute;
    left: 0;
    top: 0;
    opacity: 0.4;
}

/* logo */

.logo {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 2rem;
    position: relative;
    z-index: 1;
}

.logo>img {
    width: 150px;
}

/* header text , input form and button*/

.header .inner-container {
    margin-top: 10rem;
}

.header .inner-title {
    width: 50%;
    text-align: center;
}

.header h1 {
    margin-bottom: 1rem;
}

.header .inner-text {
    width: 50%;
    text-align: center;
}

/* showcase 1 */

.showcase {
    border-bottom: 10px solid #333;
    padding: 2rem 0;
}

.showcase-container {
    display: flex;
    width: 85%;
    margin: auto;
}

.showcase-img {
    position: relative;
    z-index: 1;
}

.showcase-animation {
    position: absolute;
    left: 75px;
    top: 95px;
    z-index: -1;
}

/* showcase 2*/

.case2 {
    width: 90%;
}

.showcase-container.case2>.showcase-img {
    margin: 1.2rem 0;
}

.downloading {
    background: #000;
    width: 60%;
    height: 125px;
    position: absolute;
    top: 335px;
    left: 125px;
    border: 5px solid #333;
    border-radius: 10px;
    padding: 0.7rem;
    display: flex;
}

.downloading>img {
    height: 100%;
}

.download-text {
    padding: 0.5rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.download-text>p {
    color: #0066e3;
}

/* showcase 3*/

.case3 .showcase-animation {
    width: 395px;
    height: 225px;
    top: 50px;
    left: 120px;
}

/* faq list */
.faq {
    border-bottom: 10px solid #333;
}

.faq .inner-container {
    line-height: 1.5;
    margin: 2rem 0;
}

.faq .inner-title {
    text-align: center;
}

.faq h1 {
    margin-bottom: 5rem;
}

.faq h2 {
    display: flex;
    justify-content: space-between;
    padding: 1.5rem;
}

.faq ul {
    width: 60%;
    margin: auto;
}

.faq li {
    border-bottom: 5px solid #000;
    background: #333;
    cursor: pointer;
}

.faq li.show i {
    transform: rotate(45deg);
}

.faq li>p {
    padding: 1rem 0;
    border-top: 1px solid #000;
    padding: 1.5rem;
    font-size: 1.3rem;
    position: absolute;
    max-height: 0;
    visibility: hidden;
    transition: max-height 0.1s ease-in;
}

.faq .inner-text {
    margin-top: 2rem;
}

/* show list item */
.faq li.show p {
    max-height: 700px;
    position: relative;
    visibility: visible;
}

/* footer */

footer {
    color: #757575;
    margin: 3rem auto;
    width: 70%;
}

footer .links>* {
    margin-bottom: 20px;
}

footer p {
    margin-bottom: 2rem;
}

footer .links ul {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-gap: 1rem;
}

footer .language {
    padding: 1rem 0;
    font-weight: 700;
    cursor: pointer;
    width: 14%;
    border: 1px solid #333;
    border-radius: 0.2rem;
    font-family: inherit;
    padding: 1rem;
    position: relative;
}

footer .language:active {
    outline: 1px solid #fff;
    box-shadow: 0 0 0 2px #fff;
}

footer .dropdown-list {
    width: 100%;
}

footer .dropdown-list ul {
    display: none;
    position: absolute;
    background: #000;
    border: 1px solid #333;
    top: 58px;
    width: 100%;
    left: 0;
}

footer .dropdown-list li {
    margin: 0.5rem 0;
}

/* show dropdown item */
footer .dropdown-list ul.show {
    display: block;
}

*Footer Bottom copyright Legal Section style Start*/
.copyright-legal{
    padding-top: 50px;
    padding-bottom: 50px;
    text-align: center;
    border-top: 1px solid #fff;
    font-family: 'Roboto Slab';
}
.copyright-legal p{
    margin-top: 50px;
    color: #757575 !important;
    text-align: center;
}
.copyright-legal p a{
    color: #757575 !important;
    text-decoration: none;
}
.copyright-legal p a:hover{
    color: #fff !important;
}
/*Footer Bottom copyright Legal Section style End*/

/* large-screen*/


@media (max-width: 950px) {
    /* global setting */

    /* button */
    .btn-lg {
        padding: 10px 12.5px;
        font-size: 15px;
        text-align: center;
        margin: 10px auto;
    }

    /* text style */

    .inner-title {
        font-size: 1.6rem;
        text-align: center;
        width: 100%;
    }

    .inner-text {
        font-size: 1.2rem;
        width: 100%;
        text-align: center;
    }

    /* email form */
    .email-form .get-started {
        padding-top: 1rem;
        display: flex;
        flex-direction: column;
    }

    .email-form .get-started>input {
        padding: 1rem;
        font-size: 1.1rem;
    }

    /* nav logo */
    .logo>img {
        width: 120px;
    }

    /* header */
    .header {
        height: 100%;
    }

    .header .inner-title {
        width: 70%;
    }

    /* showcase */
    .showcase-container {
        flex-direction: column;
        width: 90%;
    }

    .showcase-img {
        display: flex;
        justify-content: center;
    }

    .showcase-animation {
        left: 180px;
        top: 95px;
        z-index: -1;
    }

    .case2 .showcase-img {
        order: 2;
    }

    .case3 .showcase-animation {
        top: 50px;
        left: 218px;
    }

    /* faq list */
    .faq ul {
        width: 90%;
        margin: auto;
    }

    .faq h2 {
        display: flex;
        justify-content: space-between;
        padding: 0.5rem 1rem;
        font-size: 1.2rem;
    }

    /* footer */
    footer {
        width: 90%;
    }

    footer .language {
        width: 20%;
    }
}

/* tablet-screen */
@media (max-width: 768px) {
    .header .inner-container {
        margin-top: 2rem;
    }

    .inner-title {
        width: 90%;
        font-size: 1.5rem;
    }

    .inner-text {
        width: 90%;
        font-size: 1.5rem;
    }

    .case1 .showcase-animation {
        left: 100px;
    }

    .case3 .showcase-animation {
        left: 135px;
    }

    /* button */

    .btn {
        padding: 10px 15px;
        font-size: 15px;
    }
}

/* median-screen*/
@media (max-width: 550px) {
    /* nav logo */

    .logo>img {
        width: 100px;
    }

    /* showcase*/
    .inner-text .get-started>input {
        padding: 0.5rem;
        font-size: 1.1rem;
    }

    .showcase-img {
        display: flex;
        justify-content: center;
    }

    .showcase-img>img {
        width: 100%;
    }

    .case1 .showcase-animation {
        width: 400px;
        left: 35px;
        top: 45px;
    }

    .case3 .showcase-animation {
        width: 300px;
        top: 0;
        left: 85px;
    }

    .downloading {
        top: 260px;
        left: 95px;
        height: 70px;
        border: 3px solid #333;
    }

    .download-text {
        font-size: 10px;
        padding-left: 15px;
    }

    /* faq list */
    .faq h1 {
        text-align: center;
        font-size: 25px;
        margin-bottom: 0.5rem;
    }

    .faq ul {
        width: 100%;
    }

    .faq li {
        font-size: 10px;
    }

    /* footer */
    footer .links ul {
        grid-template-columns: repeat(2, 1fr);
        grid-gap: 1rem;
    }
}

@media (max-width: 375px) {
    .inner-title {
        font-size: 1rem;
    }

    .inner-text {
        font-size: 1rem;
    }

    /* header */

    .header .inner-title {
        width: 90%;
    }

    .header .inner-text {
        width: 90%;
    }

    /* showcase */
    .case1 .showcase-animation {
        width: 250px;
        left: 45px;
        top: 50px;
    }

    .case3 .showcase-animation {
        width: 210px;
        left: 60px;
        top: -25px;
    }

    .downloading {
        top: 180px;
        left: 66px;
    }
}