:root {
    --primary: #b6895b;
    --bg: #010101;
    --color: #e49e5c;
  }
  
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    outline: none;
    border: none;
    text-decoration: none;
  }
  
  html {
    scroll-behavior: smooth;
  }
  
  body {
    font-family: "poppins", sans-serif;
    background-color: var(--bg);
    color: #fff;
    min-height: 5000px;
  }
  
  /* Navbar */
  .navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.4rem 7%;
    background-color: rgba(1, 1, 1, 0.8);
    border-bottom: 1px solid #2b2018;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 9999;
  }
  
  .navbar .navbar-logo {
    font-size: 2rem;
    font-weight: 700;
    color: #fff;
    font-style: italic;
  }
  
  .navbar .navbar-logo:hover {
    color: var(--color);
  }
  
  .navbar .navbar-logo span {
    color: var(--primary);
  }
  .navbar .navbar-logo span:hover {
    color: #fff;
  }
  
  .navbar .navbar-nav a {
    color: #fff;
    display: inline-block;
    font-size: 1.4rem;
    margin: 0 1rem;
  }
  
  .navbar .navbar-nav a:hover {
    color: var(--primary);
  }
  
  .navbar .navbar-nav a::after {
    content: "";
    display: block;
    padding-bottom: 0.5rem;
    border-bottom: 0.1rem solid var(--primary);
    transform: scaleX(0);
    transition: 0.2s linear;
  }
  
  .navbar .navbar-nav a:hover::after {
    transform: scaleX(0.5);
  }
  
  .navbar .navbar-extra a {
    color: #fff;
    margin: 0 0.5rem;
  }
  
  .navbar .navbar-extra a:hover {
    color: var(--primary);
  }
  
  .navbar .navbar-extra a img {
    width: 40px;
    height: 30px;
    margin-top: 1rem;
  }
  
  #hamburger-menu {
    display: none;
  }
  
  /* Navbar Search Form */
  .navbar .search-form {
    position: absolute;
    top: 100%;
    right: 7%;
    background-color: #fff;
    width: 50rem;
    height: 5rem;
    display: flex;
    align-items: center;
    transform: scaleY(0);
    transform-origin: top;
    transition: 0.3s;
  }
  
  .navbar .search-form.active {
    transform: scaleY(1);
  }
  
  .navbar .search-form input {
    height: 100%;
    width: 100%;
    font-size: 1.6rem;
    color: var(--bg);
    padding: 1rem;
  }
  
  .navbar .search-form label {
    cursor: pointer;
    font-size: 2rem;
    margin-right: 1.5rem;
    color: var(--bg);
  }
  
  /* Hero Section */
  .hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background-image: url("../img/black.png");
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center;
    position: relative;
    -webkit-mask-image: linear-gradient(rgba(0, 0, 0, 1) 85%, rgba(0, 0, 0, 0));
    mask-image: linear-gradient(rgba(0, 0, 0, 1) 85%, rgba(0, 0, 0, 0));
  }
  
  /* .hero::after {
    content: "";
    display: block;
    position: absolute;
    width: 100%;
    height: 30%;
    bottom: 0;
    background: linear-gradient(
      0deg,
      rgba(1, 1, 3, 1) 8%,
      rgba(255, 225, 255, 0) 50%
    );
  } */
  
  .hero .content {
    padding: 1.4rem 4%;
    max-width: 60rem;
    position: fixed;
    top: 210px;
  }
  
  .hero .content h1 {
    font-size: 4em;
    color: #fff;
    text-shadow: 1px 1px 3px rgba(1, 1, 3, 0.5);
    line-height: 1.2;
  }
  
  .hero .content h1 span {
    color: var(--primary);
  }
  
  .hero .content p {
    font-size: 1rem;
    margin-top: 1rem;
    line-height: 1.4;
    font-weight: 400;
    text-shadow: 1px 1px 3px rgba(1, 1, 3, 0.5);
    mix-blend-mode: var(--color);
  }
  
  .hero .content div span {
    font-size: 1.5em;
  }
  
  .hero .content div {
    font-size: 1rem;
    line-height: 1.4;
    font-weight: 400;
    text-shadow: 1px 1px 3px rgba(1, 1, 3, 0.5);
    mix-blend-mode: difference;
  }
  
  .hero .content .cta,
  .history .cta {
    margin-top: 1rem;
    display: inline-block;
    padding: 1rem 3rem;
    font-size: 1.4rem;
    color: #fff;
    background-color: var(--color);
    border-radius: 2.4rem;
    box-shadow: 1px 1px 3px rgba(1, 1, 3, 0.5);
    font-weight: 700;
  }
  
  /*  Section */
  .pentheory,
  .sains,
  .history,
  .contact {
    padding: 8rem 7% 1.4rem;
  }
  
  /* Pembatas */
  .b-example-divider {
    height: 3rem;
    background-color: rgba(88, 81, 81, 0.1);
    border: solid rgba(102, 94, 94, 0.15);
    border-width: 1px 0;
    box-shadow: inset 0 0.5em 1.5em rgba(70, 57, 57, 0.1),
      inset 0 0.125em 0.5em rgba(70, 57, 57, 0.15);
    margin-top: 5rem;
  }
  
  .pentheory h2,
  .sains h2,
  .history h2,
  .contact h2 {
    text-align: center;
    font-size: 2.6rem;
    margin-bottom: 3rem;
  }
  
  .pentheory h2 span,
  .sains h2 span,
  .history h2 span,
  .contact h2 span {
    color: var(--primary);
  }
  
  .pentheory .row {
    display: flex;
  }
  
  .pentheory .row .pentheory-img {
    flex: 1 1 45rem;
  }
  
  .pentheory .row .pentheory-img img {
    width: 100%;
    border-radius: 2rem;
    margin-top: 5rem;
  }
  
  .pentheory .row .content {
    flex: 1 1 35rem;
    padding: 0 3rem;
  }
  
  .pentheory .row .content h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    margin-top: 5rem;
    color: var(--primary);
  }
  
  .pentheory .row .content h3:hover {
    color: #fff;
  }
  
  .pentheory .row .content p {
    margin-bottom: 0.8rem;
    font-size: 1.5rem;
    font-weight: 300;
    line-height: 1.6;
  }
  
  /* Sains Section */
  .sains h2,
  .history h2,
  .contact h2 {
    margin-bottom: 1rem;
  }
  
  .sains p,
  .history p,
  .contact p {
    text-align: center;
    max-width: 30rem;
    margin: auto;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.6;
  }
  
  .sains .sains-img img {
    width: 50%;
    border-radius: 2rem;
    margin-top: 5rem;
    height: 50%;
  }
  
  .sains .sains-img p {
    text-align: center;
    font-weight: 500;
    margin-top: 0rem;
    font-size: 1.5rem;
  }
  
  .sains .sains-img p span {
    font-size: 2em;
  }
  
  .sains .row {
    display: flex;
    flex-wrap: wrap;
    margin-top: 5rem;
    justify-content: center;
  }
  
  .sains .row .sains-card {
    text-align: center;
    padding-bottom: 5rem;
  }
  
  .sains .row .sains-card h3 {
    margin-top: 1.2rem;
  }
  
  .sains .row .sains-card img {
    border-radius: 40%;
    -webkit-border-radius: 40%;
    -moz-border-radius: 40%;
    -ms-border-radius: 40%;
    -o-border-radius: 40%;
    width: 80%;
  }
  
  .sains-card .cta-button {
    margin-top: 1rem;
    display: inline-block;
    padding: 1rem 2rem;
    font-size: 1.2rem;
    color: #fff;
    background-color: #737c80;
    border-radius: 2.4rem;
    box-shadow: 1px 1px 3px rgba(1, 1, 3, 0.5);
    font-weight: 600;
  }
  
  .sains p span {
    color: var(--color);
    font-weight: 500;
    font-size: 1.2rem;
  }
  
  .history span1 {
    color: var(--color);
    font-weight: 600;
    font-size: 1.4rem;
  }
  
  .contact p span2 {
    color: var(--color);
    font-weight: 500;
    font-size: 1.2rem;
  }
  
  /* Resource */
  .history .container {
    margin-top: 2rem;
  }
  
  /* Slideshow container */
  .history .content-slide {
    max-width: 60rem;
    position: relative;
    margin: auto;
  }
  
  .history .imgslide {
    display: none;
  }
  
  .history img {
    vertical-align: middle;
    width: 100%;
    height: 400px;
    border-radius: 2rem;
  }
  
  .history .border-custom {
    border: 2px solid rgb(61, 61, 61); /* ketebalan border 2 piksel */
    width: 100%;
    height: 4, 10px;
    border-radius: 2rem;
  }
  
  .history .prev,
  .history .next {
    cursor: pointer;
    position: absolute;
    top: 40%;
    width: auto;
    padding: 16px;
    color: rgb(255, 254, 224);
    font-weight: bold;
    font-size: 18px;
    transition: 0.6s ease;
    border-radius: 0 3px 3px 0;
    user-select: none;
    background-color: rgb(158, 120, 71);
  }
  
  .history .next {
    right: 0;
    border-radius: 3px 0 0 3px;
  }
  
  .history .text1,
  .history .text2,
  .history .text3,
  span {
    color: var(--color);
  }
  
  .history .prev:hover,
  .history .next:hover {
    background-color: rgba(255, 255, 255, 0.8);
    color: rgb(0, 0, 0);
  }
  
  .history .text1,
  .history .text2,
  .history .text3 {
    color: #fafafa;
    font-size: 15px;
    padding: 8px 12px;
    position: absolute;
    bottom: 0;
    width: 100%;
    text-align: center;
  }
  
  .history .content-slide .numberslide {
    color: #ffffff;
    font-size: 12px;
    padding: 8px 12px;
    position: absolute;
    top: 0;
  }
  
  .history .fade {
    -webkit-animation-name: fade;
    -webkit-animation-duration: 1.5s;
    animation-name: fade;
    animation-duration: 1.5s;
  }
  
  @-webkit-keyframes fade {
    from {
      opacity: 0.4;
    }
  
    to {
      opacity: 1;
    }
  }
  
  @keyframes fade {
    from {
      opacity: 0.4;
    }
    to {
      opacity: 1;
    }
  }
  
  .history .container .page {
    text-align: center;
    padding-top: 20px;
  }
  
  .history .page .dot {
    cursor: pointer;
    height: 15px;
    width: 15px;
    margin: 0 2px;
    background-color: #bbb;
    display: inline-block;
    transition: background-color 0.6s ease;
    border-radius: 50%;
  }
  
  .history .page .active,
  .page .dot:hover {
    background-color: #756925;
  }
  
  .history p {
    text-align: center;
    font-weight: 500;
    margin-top: 1.5rem;
    font-size: 1.2rem;
  }
  
  .history p span {
    font-size: 1.4rem;
    color: #fff;
  }
  
  .history .row {
    display: flex;
  }
  
  .history .row .history-img {
    flex: 1 1 45rem;
  }
  
  .history .row .history-img img {
    width: 100%;
    border-radius: 2rem;
    margin-top: 5rem;
  }
  
  .history .row .content {
    flex: 1 1 35rem;
    padding: 0 3rem;
  }
  
  .history .row .content h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    margin-top: 5rem;
    color: var(--primary);
  }
  
  .history .row .content h3:hover {
    color: #fff;
  }
  
  .history .row .content p1 {
    margin-bottom: 0.8rem;
    font-size: 1.5rem;
    font-weight: 300;
    line-height: 1.6;
  }
  
  /* contact section */
  .contact .row {
    display: flex;
    margin-top: 2rem;
    background-color: #222;
    border-radius: 4rem;
  }
  
  .contact .row form {
    flex: 1 1 45rem;
    padding: 5rem 2rem;
    text-align: center;
  }
  
  .contact .row form .input-group {
    display: flex;
    align-items: center;
    margin-top: 2rem;
    background-color: var(--bg);
    border: 1px solid #eee;
    padding-left: 2rem;
    border-radius: 2rem;
    max-width: 600px;
  }
  
  .contact .row form .input-group input {
    width: 100%;
    padding: 2rem;
    font-size: 1.7rem;
    background: none;
    color: #fff;
  }
  
  .contact .row form .btn {
    margin-top: 3rem;
    display: inline-block;
    padding: 1rem 3rem;
    font-size: 1.7rem;
    color: #fff;
    background-color: var(--primary);
    cursor: pointer;
    border-radius: 2rem;
  }
  
  /* footer */
  footer {
    background-color: var(--primary);
    text-align: center;
    padding: 1rem 0 3rem;
    margin-top: 6rem;
    border-radius: 2rem;
    -webkit-border-radius: 2rem;
    -moz-border-radius: 2rem;
    -ms-border-radius: 2rem;
    -o-border-radius: 2rem;
  }
  
  footer .socials {
    padding: 1rem 0;
  }
  
  footer .socials a {
    color: #fff;
    margin: 1rem;
  }
  
  footer .socials a:hover,
  footer .made a:hover {
    color: var(--bg);
  }
  
  footer .made {
    margin-bottom: 1.4rem;
    font-weight: 400;
  }
  
  footer .made a {
    color: #fff;
    padding: 0.7rem 1rem;
  }
  
  footer .creadit {
    font-size: 0.8rem;
  }
  
  footer .creadit a {
    color: var(--bg);
    font-weight: 700;
  }
  
  /* Detail Items */
  /* Text-Detail-Content */
  .detail {
    display: none;
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.6);
  }
  
  .detail-container {
    position: relative;
    background-color: #fefefe;
    color: var(--bg);
    margin: 15% auto;
    padding: 1.2rem;
    border: 1px solid #666;
    width: 50%;
    border-radius: 2rem;
    animation: animateDetail 0.5s;
  }
  
  /* Detail Animation */
  @keyframes animateDetail {
    from {
      top: -300px;
      opacity: 0;
    }
    to {
      top: 0;
      opacity: 1;
    }
  }
  
  .detail-container .close-icon {
    position: absolute;
    right: 1rem;
  }
  
  .detail-content {
    display: flex;
    flex-wrap: nowrap;
  }
  
  .detail-content img {
    height: 15rem;
    width: 15rem;
    margin-right: 2rem;
    margin-bottom: 2rem;
    margin-top: 1.5rem;
  }
  
  .text-content h3 {
    font-size: 1.2rem;
    line-height: 1.8rem;
    margin-top: 1.2rem;
    text-align: left;
    font-weight: 600;
  }
  
  .text-content h3 span {
    color: var(--primary);
  }
  
  .text-content p {
    font-size: 1.2rem;
    line-height: 1.8rem;
    margin-top: 1.2rem;
    text-align: left;
    font-weight: 300;
  }
  
  /* Media Queries */
  
  /* Laptop */
  @media (max-width: 1366px) {
    html {
      font-size: 75%;
    }
  }
  
  /* Tablet */
  @media (max-width: 768px) {
    html {
      font-size: 62, 5%;
    }
    /* hamburger-menu */
    #hamburger-menu {
      display: inline-block;
    }
  
    /* .navbar */
    .navbar .navbar-nav {
      position: absolute;
      top: 100%;
      right: -100%;
      background-color: #fff;
      width: 30rem;
      height: 100vh;
      transition: 0.3s;
    }
  
    .navbar .navbar-nav.active {
      right: 0;
    }
  
    .navbar .navbar-nav a {
      color: var(--bg);
      display: block;
      margin: 1.5rem;
      padding: 0.5rem;
      font-size: 2rem;
    }
  
    .navbar .navbar-nav a::after {
      transform-origin: 0 0;
    }
    .navbar .navbar-nav a:hover::after {
      transform: scalex(0.2);
    }
  
    /* .pentheory */
    .pentheory .row {
      flex-wrap: wrap;
    }
  
    .pentheory .row .pentheory-img img {
      height: 24rem;
      object-fit: cover;
      object-position: center;
    }
  
    .pentheory .row .content {
      padding: 0;
    }
  
    .pentheory .row .content h3 {
      margin-top: 1rem;
      font-size: 2rem;
    }
  
    .pentheory .row .content p {
      font-size: 1.5rem;
    }
  
    /* .sains */
    .sains p {
      font-size: 1.2rem;
    }
  
    .sains .sains-img img {
      height: 24rem;
      width: 100%;
      object-fit: cover;
      object-position: center;
    }
  
    /* .history */
    .history img {
      height: 24rem;
      width: 100%;
      object-fit: cover;
      object-position: center;
    }
  
    .history .row {
      flex-wrap: wrap;
    }
  
    .history .row .history-img img {
      height: 24rem;
      width: 100%;
      object-fit: cover;
      object-position: center;
      margin-top: 5rem;
    }
  
    .history .row .content {
      padding: 0;
    }
  
    .history .row .content h3 {
      margin-top: 1rem;
      font-size: 2rem;
      text-align: center;
    }
  
    .history .row .content p {
      font-size: 1.5rem;
    }
  
    .contact .row {
      flex-wrap: wrap;
    }
  
    .navbar .search-form {
      width: 90%;
      right: 2rem;
    }
  
    .detail-content {
      flex-wrap: wrap;
    }

    .detail-container {
      width: 70%;
      height: 70%;
    }

    .detail-container .close-icon {
      position: absolute;
      right: 1rem;
    }

    .detail-content img {
      height: 25rem;
      width: 25rem;
      margin-right: 2rem;
      margin-bottom: 2rem;
      margin-top: 1.5rem;
    }
  }
  
  /* Mobile Phone */
  @media (max-width: 450px) {
    html {
      font-size: 55%;
    }
  }