/* Author: Yelin(Lawrence) Liu */

@font-face {
    font-family: 'Cambriab';
    src: url('./assets/cambriab.ttf') format('truetype');
    font-weight: normal;
    font-style: normal;
}

/* ----- Basic ----- */
:root {
    --secondary-bg-color: #dde9eb;
    --primary-color-light-2: #7098b2;
    --primary-color-light-1: #406e8c;
    --primary-color: #215170;
    --primary-color-dark: #103953;

    --primary-bg-color: #ffffff;
    --alter-bg-color: #e8e9e9;
    --text: #303030;
}

::selection {
    background-color: var(--text);
    color: var(--primary-bg-color);
}

*,
*:before,
*:after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}



/* ----- Types ----- */
html {
    font-family: Arial, Cambriab, serif;
    font-size: 10px;
}

/*
Media queries
0-600 phone
600-900 tablet
900-1200 landscape tablet
1200-1800 normal desktop
1800 big screen
*/

h1,
h2,
h3,
h4,
h5 {
    font-family: Cambriab, Arial, serif;
}

h1 {
    font-size: 4.8rem;
    color: var(--primary-bg-color);
    background-color: var(--primary-color);
    font-weight: bold;
}

h2 {
    font-size: 3.6rem;
    color: var(--text);
    font-weight: bold;
}

h3 {
    font-size: 3rem;
    color: var(--primary-color);
    font-weight: bold;
}

h4 {
    font-size: 2.4rem;
    color: var(--primary-color);
    font-weight: bold;
}

h5 {
    font-size: 2.2rem;
    color: var(--primary-color);
    font-weight: bold;
}

h6 {
    font-size: 2rem;
    font-family: Arial, sans-serif;
    color: var(--text);
    font-weight: bold;
}

p {
    font-size: 2rem;
    font-family: Arial, sans-serif;
    color: var(--text);
}

a {
    font-size: 2rem;
    font-family: Arial, sans-serif;
    text-decoration: underline;
}

a:hover {
    font-weight: bold;
    color: var(--primary-bg-color);
    background-color: var(--primary-color);
}

.huge-text {
    font-family: Arial, sans-serif;
    font-size: 3rem;
    color: var(--text);
}

.big-text {
    font-family: Arial, sans-serif;
    font-size: 2.4rem;
    color: var(--text);
}

.section-title {
    text-align: center;
    margin: 10rem auto;
    text-transform: uppercase;
}

/* ----- Layout ----- */
.row {
    max-width: 120rem;
    margin: 0 auto;
    color: var(--text);
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}

.col--2 {
    flex-basis: 45%;
}

.col--3 {
    flex-basis: 30%;
}

.col--4 {
    flex-basis: 25%;
}

@media(max-width: 900px) {
    .col--2 {
        flex-basis: 100%;
    }

    .col--3 {
        flex-basis: 100%;
    }

    .col--4 {
        flex-basis: 45%;
    }
}

@media(max-width: 600px) {
    .col--2 {
        flex-basis: 100%;
    }

    .col--3 {
        flex-basis: 100%;
    }

    .col--4 {
        flex-basis: 100%;
    }
}

/* ----- Buttons ----- */
.btn {
    display: inline-block;
    padding: 1rem 3rem;
    border-radius: 1rem;
    font-size: 1.6rem;
    font-weight: bold;
    text-transform: uppercase;
    color: var(--text);
    background-color: var(--primary-bg-color);
    cursor: pointer;
    transition: all .3s ease-in-out;
    text-decoration: none;
    border: none;
}

.btn:hover {
    background-color: var(--primary-color);
    color: var(--primary-bg-color);
}

.btn--submit {
    margin-top: 1rem;
    border: none;
}

.btn--more {
    display: inline-block;
    padding: 0;
    background-color: transparent;
    color: var(--primary-color-light-2);
}

.btn--more:hover {
    background-color: transparent;
    color: var(--primary-color);
}



/* ----- animation ----- */

@keyframes MoveInRight {
    0% {
        opacity: 0;
        transform: translateX(10rem);
    }

    80% {
        transform: translateX(-2rem);
    }

    100% {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes Appearance {
    0% {
        opacity: 0;
    }

    100% {
        opacity: 1;
    }
}

@keyframes hoverToFloat {
    0% {
        transform: translateY(0);
        box-shadow: 0 .5rem 1rem 0 rgba(0, 0, 0, 0.2);
    }

    80% {
        transform: translateY(-0.8rem);
    }

    100% {
        transform: translateY(-1rem);
        box-shadow: 0 1rem 2rem 0 rgba(0, 0, 0, 0.2);
    }
}

@keyframes shrink {
    0% {
        transform: scale(1);
    }

    100% {
        transform: scale(0.9);
    }
}

/* ----- navigation component ----- */

/* I used a checkbox navigation bar instead of dropdown menu to improve the usability of
the mobile devices as on mobile device it is not so convient to hover and return a sub menu. */

.navigation__checkbox {
    display: none;
}

.navigation__button {
    background-color: var(--primary-bg-color);
    height: 7rem;
    width: 7rem;
    position: fixed;
    top: 6rem;
    right: 6rem;
    border-radius: 50%;
    z-index: 9999;
    box-shadow: 0 1.5rem 4rem rgba(0, 0, 0, 0.4);
    cursor: pointer;
    text-align: center;
    animation: MoveInRight .3s ease-out .5s;
}

.navigation__background {
    height: 6rem;
    width: 6rem;
    border-radius: 50%;
    position: fixed;
    top: 6.5rem;
    right: 6.5rem;
    background-image: radial-gradient(var(--primary-color-light-2), var(--primary-color));
    z-index: 999;
    transition: transform 0.8s ease-in-out;
    animation: MoveInRight .3s ease-out .5s;
}

@media (min-width: 1201px) {

    .navigation__button,
    .navigation__background {
        display: none;
    }
}

@media (max-width: 900px) {
    .navigation__button {
        top: 3.7rem;
        right: 3.7rem;
    }

    .navigation__background {
        top: 4rem;
        right: 4rem;
    }
}

@media (max-width: 600px) {
    .navigation__button {
        top: 2.7rem;
        right: 2.7rem;
    }

    .navigation__background {
        top: 3rem;
        right: 3rem;
    }
}

.navigation__nav {
    height: 100vh;
    width: 0%;
    position: fixed;
    top: 0;
    right: 0;
    z-index: 2000;
    opacity: 0;
    transition: all .8s;
}

.navigation__list {
    position: absolute;
    width: 100%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    list-style: none;
    text-align: center;
}

.navigation__item {
    margin: 1rem;
}

.navigation__link:link,
.navigation__link:visited {
    display: inline-block;
    font-size: 3rem;
    font-weight: 300;
    padding: 1rem 2rem;
    color: var(--primary-bg-color);
    text-decoration: none;
    text-transform: uppercase;
    background-image: linear-gradient(120deg, transparent 0%, transparent 50%, var(--primary-bg-color) 50%);
    background-size: 220%;
    transition: all .4s;
}

.navigation__link:hover,
.navigation__link:active {
    background-position: 100%;
    transform: translateX(-1rem);
}

.navigation__form-container {
    position: relative;
}

.navigation__form-icon {
    position: absolute;
    font-size: 1.8rem;
    top: calc(50% - 0.8rem);
    left: calc(50% - 8.2rem);
    color: var(--primary-color-dark)
}

.navigation__form-input {
    height: 3rem;
    width: 18rem;
    border-radius: .5rem;
    border: none;
    padding: 0 3rem;
    font-size: 1.6rem;
}

.navigation__checkbox:checked~.navigation__background {
    transform: scale(80);
}

.navigation__checkbox:checked~.navigation__nav {
    width: 100%;
    opacity: 100;
}

/* draw an animated navigation icon */
.navigation__icon {
    position: relative;
    margin-top: 3.5rem;
}

.navigation__icon,
.navigation__icon::before,
.navigation__icon::after {
    width: 3rem;
    height: 2px;
    background-color: #333;
    display: inline-block;
}

.navigation__icon::before,
.navigation__icon::after {
    content: "";
    position: absolute;
    left: 0;
    transition: all .2s;
}

.navigation__icon::before {
    top: -.8rem;
}

.navigation__icon::after {
    top: .8rem;
}

.navigation__button:hover .navigation__icon::before {
    top: -1rem;
}

.navigation__button:hover .navigation__icon::after {
    top: 1rem;
}

.navigation__checkbox:checked+.navigation__button .navigation__icon {
    background-color: transparent;
}

.navigation__checkbox:checked+.navigation__button .navigation__icon::before {
    top: 0;
    transform: rotate(135deg);
}

.navigation__checkbox:checked+.navigation__button .navigation__icon::after {
    top: 0;
    transform: rotate(-135deg);
}

/* ----- Section Header ----- */
.header {
    background-color: var(--primary-color);
}

.header__container {
    width: 100%;
    padding: 1rem 3.2rem;
    display: flex;
    justify-content: space-between;
}

@media(max-width: 600px) {
    .header__container {
        justify-content: space-evenly;
    }
}

.header__company {
    display: flex;
    align-items: center;
}

.header__company-logo-img {
    width: 100%;
}

@media(max-width: 1200px) {
    .header__menu {
        display: none;
    }
}


.header__menu-list{
    list-style-type: none;
}

.header__menu-item{
    display: inline-block;
    margin: 0 1rem;
}

.header__menu-link{
    color: var(--primary-bg-color);
    text-decoration: none;
    line-height: 86px;
}

.header__menu-link:hover{
    color: var(--primary-color-dark);
}

.header__form-container {
    position: relative;
}

.header__form-icon {
    position: absolute;
    font-size: 1.8rem;
    top: calc(50% - 0.8rem);
    left: calc(50% - 8.2rem);
    color: var(--primary-color-dark)
}

.header__form-input {
    height: 3rem;
    width: 18rem;
    border-radius: .5rem;
    border: none;
    padding: 0 3rem;
    font-size: 1.6rem;
}


/* ----- Section Sub Header ----- */
.sub-header {
    display: relative;
    background-color: var(--primary-color);
}

.slider {
    width: 100%;
    height: 75vh;
    background-color: var(--primary-bg-color);
    margin: 0 auto;
    position: relative;
}

.slider__control {
    position: absolute;
    display: block;
    top: 50%;
    transform: translateY(-50%);
    width: 5rem;
    height: 5rem;
    border-radius: 50%;
    background-color: rgba(33, 81, 112, 0.1);
    cursor: pointer;
    transition: all .3s ease-in-out;
    z-index: 1;
}

.slider__control--left {
    left: 1rem;
    text-align: center;
}

.slider__control--left:hover {
    background-color: var(--primary-color);
}

.slider__control-left-icon {
    font-size: 4rem;
    transform: rotate(-90deg);
    margin-top: .5rem;
    color: rgba(33, 81, 112, 0.3);
}

.slider__control--left:hover .slider__control-left-icon {
    color: var(--alter-bg-color);
}

.slider__control--right {
    right: 1rem;
    text-align: center;
}

.slider__control--right:hover {
    background-color: var(--primary-color);
}

.slider__control-right-icon {
    font-size: 4rem;
    transform: rotate(90deg);
    margin-top: .5rem;
    color: rgba(33, 81, 112, 0.3);
}

.slider__control--right:hover .slider__control-right-icon {
    color: var(--alter-bg-color);
}

.slider__content-container {
    position: relative;
    height: 100%;
    list-style-type: none;
    overflow: hidden;
}

.slider__content-item {
    position: absolute;
    top: 0;
    left: 100%;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: all 0.3s ease-in-out;
}

.slider__content-item--active {
    left: 0;
    opacity: 1;
}

.slider__content-item--prev {
    left: -100%;
}

.slider__title {
    margin: 3rem;
    text-align: center;
}

.slider__form {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 1;
}

@media(min-width:1801px) {
    .slider__form {
        width: 70rem;
    }
}

@media(max-width:1800px) {
    .slider__form {
        width: 35%;
    }
}

@media(max-width:1200px) {
    .slider__form {
        width: 30%;
    }
}

@media(max-width:900px) {
    .slider__form {
        width: 26rem;
    }
}

@media(max-width:600px) {
    .slider__form {
        width: 60%;
    }
}

.slider__formgroup {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    margin-bottom: 2rem;
}

.slider__form-label {
    font-size: 1.6rem;
    color: var(--text);
    margin-bottom: .5rem;
}

.slider__input {
    width: 100%;
    height: 4rem;
    border: 1px solid var(--primary-color-dark);
    background-color: rgba(255, 255, 255, 0.6);
    border-radius: .5rem;
    padding: 0 1rem;
    font-size: 1.6rem;
    color: var(--text);
}


.slider__background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    filter: opacity(0.5);
    z-index: 0;
}

.slider__dots {
    position: absolute;
    bottom: 1rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1;
}

.slider__dot {
    width: 1rem;
    height: 1rem;
    border-radius: 50%;
    background-color: var(--primary-bg-color);
    margin: 0 .5rem;
    cursor: pointer;
    transition: all 0.3s ease-in-out;
}

.slider__dot--active {
    background-color: var(--primary-color);
}

/* ----- Section feature ----- */

.feature {
    width: 100%;
    background-color: var(--primary-bg-color);

}

.feature-box {
    width: 80%;
    height: 45rem;
    margin: 0 auto;
    margin-bottom: 5rem;
    display: flex;
    flex-direction: column;
    justify-content: space-evenly;
    align-items: center;
    border-radius: 1rem;
    box-shadow: 0 .5rem 1rem 0 rgba(0, 0, 0, 0.2);
}

.feature-box:hover {
    transform: translateY(-1rem);
    animation: hoverToFloat .3s ease-in-out forwards;
}

@media(max-width: 900px) {
    .feature-box {
        width: 60%;
    }
}

@media(max-width: 600px) {
    .feature-box {
        width: 80%;
    }
}

.feature-box__icon {
    font-size: 7rem;
    color: var(--primary-color);
}

@media(max-width: 900px) {
    .feature-box__icon {
        font-size: 8rem;
    }
}

.feature-box__description {
    padding: 0 3rem;
    text-align: justify;
}

@media(max-width: 900px) {
    .feature-box__description {
        font-size: 1.8rem;
    }
}

/* ----- Section action ----- */

.action {
    width: 100%;
    background-color: var(--secondary-bg-color);
    padding: 5rem;
}

.action__image-container {
    opacity: 80%;
}

.action__image {
    width: 100%;
}

@media(max-width: 900px) {
    .action__image-container {
        width: 60%;
        margin: 0 auto;
    }
}

@media(max-width: 600px) {
    .action__image-container {
        width: 100%;
        margin: 0 auto;
    }
}

.action__content {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    margin-left: 3rem;
}

@media(max-width: 900px) {
    .action__content {
        width: 60%;
        margin: 0 auto;
    }
}

@media(max-width: 600px) {
    .action__content {
        width: 100%;
        margin: 0 auto;
    }
}

.action__content-title {
    margin-bottom: 4rem;
}

.action__content-description {
    margin-bottom: 4rem;
}

/* ----- Section gallery ----- */

.gallery {
    width: 100%;
    padding: 5rem;
    background-color: var(--primary-bg-color);
}

.gallery__image-container {
    margin: 1rem;
    position: relative;
    cursor: pointer;
}


.gallery__image {
    width: 100%;
    height: 100%;
}

.gallery__description {
    display: none;
    width: 100%;
    height: 100%;
    padding: 2rem;
    position: absolute;
    color: var(--primary-bg-color);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgba(33, 81, 112, 0.8);
    transition: all 0.3s ease-in-out;
}

@media(max-width: 600px) {
    .gallery__description {
        font-size: 2rem;
    }
}

.gallery__image-container:hover {
    border: 1rem solid var(--primary-color);
    animation: shrink .3s ease-in-out forwards;
}


.gallery__image-container:hover .gallery__description {
    display: block;
}

.gallery__lightbox{
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    z-index: 9999;
    animation: Appearance .3s ease-in-out forwards;
}

.gallery__lightbox-img-contianer{
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    justify-content: center;
    align-items: center;
}

.gallery__lightbox-img{
    width: 100%;
    height: 100%;
}

.gallery__lightbox-close{
    position: absolute;
    top: 6rem;
    right: 6rem;
    font-size: 6rem;
    color: var(--primary-bg-color);
    background-color: transparent;
    cursor: pointer;
    border: none;
}

/* ----- Section blog ----- */

.blog {
    width: 100%;
    background-color: var(--secondary-bg-color);
    padding: 5rem;
}


.blog__box {
    width: 80%;
    margin: 0 auto;
    margin-bottom: 5rem;
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: 0 .5rem 1rem 0 rgba(0, 0, 0, 0.2);
}

.blog__box:hover {
    transform: translateY(-1rem);
    animation: hoverToFloat .3s ease-in-out forwards;
}

.blog__cover {
    width: 100%;
    height: 30%;
    background-size: cover;
    background-position: center;
    overflow: hidden;
}

.blog__image {
    width: 100%;
}

.blog__content {
    display: flex;
    height: 25rem;
    flex-direction: column;
    justify-content: space-between;
    padding: 2rem;
}

.blog__subtitle {
    font-size: 1.6rem;
    color: var(--text);
}

.blog__description {
    font-size: 1.6rem;
    color: var(--text);
    text-align: justify;
}

/* ----- Section footer ----- */

.footer {
    width: 100%;
    background-color: var(--primary-color);
    padding: 3rem;
    text-align: center;
}

.footer__title {
    color: var(--primary-bg-color);
    margin-bottom: 2rem;
}

.footer__list {
    list-style-type: none;
    margin: 3rem;
}

.footer__item {
    margin: 1rem 0;
}

.footer__link {
    color: var(--alter-bg-color);
    text-decoration: none;
}

.footer__link:hover {
    color: var(--secondary-bg-color);
    background-color: transparent;
}

.footer__logo-container{
    width: 6.4rem;
    height: 6.4rem;
    margin: 0 auto;
}

.footer__bottom {
    margin-top: 2.5rem;
    width: 100%;
    height: 3rem;
    text-align: center;
}

.footer__tagline {
    color: var(--primary-bg-color);
    font-size: 1.6rem;
}