:root {
    --main-color: #00b7ff;
  }
  * {
    box-sizing: border-box;
  }
  body {
    font-family: 'Open Sans', sans-serif;
  }
  .container {
    /* width: 1170px; */
    padding-left: 15px;
    padding-right: 15px;
    margin: auto;
  }
  /* Start Settings Box */
.settings-box {
    position: fixed;
    left: -200px;
    top: 0;
    background-color: rgb(165, 161, 161);
    width: 200px;
    z-index: 1000;
    min-height: 100vh;
    transition: .3s;
    border: 1px solid #EEE;
}
.settings-box.open {
    left: 0;
}
.settings-box .toggle-settings {
    position: absolute;
    right: -30px;
    top: 100px;
    background-color: #FFF;
    text-align: center;
    cursor: pointer;
}
.settings-box .toggle-settings .fa-gear {
    width: 30px;
    padding: 8px 0;
}
.settings-box .option-box {
    padding: 10px;
    text-align: center;
    background-color: #EEE;
    margin: 10px;
}
.settings-box .option-box h4 {
    margin: 0;
    color: #666;
    font-size: 14px;
}
.settings-box .option-box .colors-list {
    list-style: none;
    text-align: center;
    padding: 0;
    margin: 10px 0 0;
}
.settings-box .option-box .colors-list li {
    width: 24px;
    height: 24px;
    background-color: #333;
    border-radius: 50%;
    cursor: pointer;
    display: inline-block;
    border: 3px solid #EEE;
}
.settings-box .option-box .colors-list li.active {
    border-color: #FFF;
}
.settings-box .option-box .colors-list li:first-child {
    background-color: #FF9800;
}
.settings-box .option-box .colors-list li:nth-child(2) {
    background-color: #E91E63;
  }
  .settings-box .option-box .colors-list li:nth-child(3) {
    background-color: #009688;
  }
  .settings-box .option-box .colors-list li:nth-child(4) {
    background-color: #03A9F4;
  }
  .settings-box .option-box .colors-list li:nth-child(5) {
    background-color: #4CAF50;
  }
  .settings-box .option-box .yes,
  .settings-box .option-box .no {
    width: 50px;
    background-color: var(--main-color);
    color: #FFF;
    margin-top: 10px;
    display: inline-block;
    font-size: 12px;
    padding: 4px 10px;
    font-weight: bold;
    border-radius: 4px;
    opacity: .5;
    cursor: pointer;
  }
  .settings-box .option-box span.active {
    opacity: 1;
  }
  .settings-box .reset-options {
    background-color: #F44336;
    border: none;
    width: 178px;
    margin: 10px auto;
    display: block;
    color: #FFF;
    font-weight: bold;
    padding: 10px;
    border-radius: 4px;
    cursor: pointer;
  }
  /* End Settings Box */
  /* Start Nav Bullets */
  .nav-bullets {
    position: fixed;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 40px;
    z-index: 1000;
  }
  .nav-bullets .bullet {
    width: 20px;
    height: 20px;
    border: 3px solid var(--main-color);
    margin: 20px auto;
    border-radius: 50%;
    cursor: pointer;
    position: relative;
  }
  .nav-bullets .bullet:hover .tooltip {
    display: block;
  }
  .nav-bullets .bullet .tooltip {
    background-color: var(--main-color);
    width: 120px;
    color: #FFF;
    padding: 8px 10px;
    position: absolute;
    right: 32px;
    top: -10px;
    text-align: center;
    cursor: default;
    pointer-events: none;
    display: none;
  }
  .nav-bullets .bullet .tooltip:before {
    content: '';
    border-style: solid;
    border-width: 10px;
    border-color: transparent transparent transparent var(--main-color);
    height: 0;
    width: 0;
    position: absolute;
    right: -20px;
    top: 50%;
    transform: translateY(-50%);
  }
  /* End Nav Bullets */
  /* Start Landing Page */
  .landing-page {
    min-height: 100vh;
    background-image: url('../imgs/01.jpg');
    background-size: cover;
    position: relative;
  }
  .landing-page .overlay {
    background-color: rgba(0, 0, 0, .6);
    position: absolute;
    width: 100%;
    height: 100%;
    left: 0;
    top: 0;
    z-index: 1;
  }
  .landing-page .container {
    position: relative;
    z-index: 999;
  }
  .header-area {
    position: relative;
    z-index: 2;
    color: #FFF;
    display: flex;
    padding: 10px;
  }
  .header-area .logo {
    width: 300px;
    padding: 15px;
    font-weight: bold;
  }
  .header-area .links-container {
    width: 100%;
    text-align: right;
  }
  .header-area .links {
    list-style: none;
    padding-left: 0;
  }
  .header-area .links li {
    display: inline-block;
    margin-left: 10px;
  }
  .header-area .links li a {
    color: #FFF;
    text-decoration: none;
    transition: .3s;
  }
  .header-area .links li a:hover,
  .header-area .links li a.active {
    color: var(--main-color);
  }
  .header-area .toggle-menu {
    background: none;
    border: none;
    width: 40px;
    cursor: pointer;
    margin-top: 15px;
    display: none;
    position: relative;
  }
  .header-area .toggle-menu.menu-active:before {
    content: '';
    border-width: 10px;
    border-style: solid;
    border-color: transparent transparent #fff transparent;
    position: absolute;
    bottom: -15px;
    left: 10px;
  }
  .header-area .toggle-menu:focus {
    outline: none;
  }
  .header-area .toggle-menu span {
    display: block;
    background-color: #FFF;
    height: 4px;
    margin-bottom: 4px;
  }
  .introduction-text {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    z-index: 2;
    color: #FFF;
    text-align: center; 
    width: 95%;
  }
  .introduction-text h1 {
    font-size: 34px;
    margin: 0 0 12px;
  }
  @media (max-width: 575px) {
    .introduction-text h1 {
      font-size: 26px;
    }
  }
  .introduction-text h1 span {
    color: var(--main-color);
  }
  .introduction-text p {
    line-height: 1.6;
    font-size: 20px;
    margin: 0;
  }
  @media (max-width: 991px) {
    .header-area .links {
      display: none;
    }
    .header-area .links.open {
      background-color: #FFF;
      padding: 10px;
      display: block;
      position: absolute;
      left: 0;
      top: 50px;
      width: 100%;
      border-radius: 4px;
      text-align: left;
    }
    .header-area .links.open li {
      display: block;
      margin: 10px;
    }
    .header-area .links.open li a {
      color: var(--main-color);
      font-weight: bold;
    }
    .header-area .toggle-menu {
      display: inline-block;
    }
  }
  /* End Landing Page */
  /* Start About Us */
  .about-us {
    padding-top: 50px;
    padding-bottom: 50px;
    display: flex;
  }
  @media (max-width: 767px) {
    .about-us {
      display: block;
      text-align: center;
    }
  }
  .about-us .info-box {
    flex: 1;
    padding: 30px;
  }
  @media (max-width: 767px) {
    .about-us .info-box {
      padding: 0;
    }
  }
  .about-us .info-box h2 {
    font-weight: bold;
    font-size: 30px;
    color: var(--main-color);
    margin: 0 0 10px;
  }
  .about-us .info-box p {
    line-height: 1.8;
    color: #767676;
    margin: 0;
  }
  .about-us .image-box {
    flex: 1;
    text-align: center;
  }
  .about-us .image-box img {
    width: 250px;
  }
  /* End About Us */
  /* Start Skills */
  .skills {
    padding-top: 50px;
    padding-bottom: 50px;
    background-color: #EEE;
  }
  .skills h2 {
    font-weight: bold;
    font-size: 30px;
    color: var(--main-color);
    margin: 0 0 50px;
    text-align: center;
  }
  .skills .skill-box {
    background-color: #FFF;
    display: flex;
    padding: 15px;
    margin-bottom: 15px;
  }
  @media (max-width: 767px) {
    .skills .skill-box {
      display: block;
    }
  }
  .skills .skill-box .skill-name {
    font-weight: bold;
    width: 140px;
    text-align: center;
    line-height: 30px;
  }
  @media (max-width: 767px) {
    .skills .skill-box .skill-name {
      width: 100%;
      margin-bottom: 15px;
    }
  }
  .skills .skill-box .skill-progress {
    height: 30px;
    width: 100%;
    background-color: #f6f6f6;
    border-radius: 6px;
    position: relative;
    overflow: hidden;
  }
  .skills .skill-box .skill-progress span {
    position: absolute;
    left: 0;
    top: 0;
    width: 0;
    height: 100%;
    background-color: var(--main-color);
    transition: all .5s;
  }
  /* End Skills */
  /* Start Gallery */
  .gallery {
    padding-top: 50px;
    padding-bottom: 50px;
    text-align: center;
    background-color:  rgb(228, 227, 227);
  }
  .gallery h2 {
    font-weight: bold;
    font-size: 30px;
    color: var(--main-color);
    margin: 0 0 50px;
    text-align: center;
  }
  .gallery .images-b
  ox {
    text-align: center;
  }
  .gallery .images-box img {
    width: 200px;
    padding: 3px;
    background-color: #F6F6F6;
    border: 1px solid #CCC;
    margin: 5px;
    cursor: pointer;
  }
  .popup-overlay {
    position: fixed;
    background-color: rgba(0, 0, 0, .7);
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
  }
  .popup-box {
    position: fixed;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    background-color: #FFF;
    border: 1px solid #CCC;
    padding: 20px;
    z-index: 1001;
  }
  .popup-box h3 {
    font-weight: bold;
    text-align: center;
    margin: 0 0 20px;
    color: var(--main-color);
  }
  .popup-box img {
    max-width: 100%;
  }
  .close-button {
    position: absolute;
    top: -15px;
    right: -15px;
    background-color: var(--main-color);
    width: 40px;
    height: 40px;
    line-height: 40px;
    text-align: center;
    font-size: 20px;
    color: #FFF;
    cursor: pointer;
    font-weight: bold;
    font-family: Arial, Tahoma;
    border-radius: 50%;
  }
  /* End Gallery */
  /* Start Timeline */
  .timeline {
    padding-top: 50px;
    padding-bottom: 50px;
    background-color: rgb(228, 228, 228); 
  }
  .timeline .timeline-content {
    position: relative;
    overflow: hidden;
  }
  .timeline .timeline-content:before {
    content: '';
    width: 2px;
    height: 100%;
    background-color: var(--main-color);
    position: absolute;
    left: 50%;
    margin-left: -1px;
    top: 0;
  }
  .timeline .timeline-content .year {
    margin: 20px auto;
    width: 50px;
    background-color: var(--main-color);
    position: relative;
    z-index: 2;
    border-radius: 4px;
    text-align: center;
    color: #FFF;
    padding: 2px 5px;
    font-weight: bold;
  }
  .timeline .timeline-content .left,
  .timeline .timeline-content .right {
    width: calc(50% - 25px);
    margin-bottom: 40px;
    position: relative;
  }
  @media (max-width: 767px) {
    .timeline .timeline-content .left, 
    .timeline .timeline-content .right {
      width: 100%;
      margin-bottom: 20px;
    }
    .timeline .timeline-content .left:before, 
    .timeline .timeline-content .right:before {
      display: none;
    }
    .timeline .timeline-content .left .content:before,
    .timeline .timeline-content .right .content:before {
      display: none;
    }
  }
  .timeline .timeline-content .left {
    float: left;
  }
  .timeline .timeline-content .left:before {
    right: -35px;
  }
  .timeline .timeline-content .right {
    float: right;
  }
  .timeline .timeline-content .right:before {
    left: -35px;
  }
  .timeline .timeline-content .left:before,
  .timeline .timeline-content .right:before {
    content: '';
    width: 14px;
    height: 14px;
    background-color: #FFF;
    border: 3px solid var(--main-color);
    position: absolute;
    border-radius: 50%;
    top: 20px;
  }
  .timeline .timeline-content .content {
    padding: 20px;
    background-color: #FFF;
  }
  .timeline .timeline-content .content h3 {
    font-weight: bold;
    color: var(--main-color);
    margin: 0 0 10px;
  }
  .timeline .timeline-content .content p {
    color: #666;
    margin: 0;
    line-height: 1.6;
  }
  .clearfix {
    clear: both;
  }
  .timeline .timeline-content .left .content:before {
    content: '';
    border-style: solid;
    border-width: 10px;
    border-color: transparent transparent transparent #FFF;
    height: 0;
    width: 0;
    position: absolute;
    right: -20px;
    top: 20px;
  }
  .timeline .timeline-content .right .content:before {
    content: '';
    border-style: solid;
    border-width: 10px;
    border-color: transparent #FFF transparent transparent ;
    height: 0;
    width: 0;
    position: absolute;
    left: -20px;
    top: 20px;
  }
  /* End Timeline */
  /* Start Features */
  .features {
    padding-top: 80px;
    padding-bottom: 80px;
  }
  .features h2 {
    font-weight: bold;
    font-size: 30px;
    color: var(--main-color);
    margin: 0 0 60px;
    text-align: center;
  }
  .features .feat-box {
    width: calc(100% / 3);
    float: left;
    text-align: center;
    margin-bottom: 40px;
  }
  @media (max-width: 991px) {
    .features .feat-box {
      width: calc(100% / 2);
    }
  }
  @media (max-width: 575px) {
    .features .feat-box {
      width: 100%;
    }
  }
  .features .feat-box img {
    width: 96px;
  }
  .features .feat-box h4 {
    font-size: 22px;
    margin: 15px 0 40px;
    position: relative;
  }
  .features .feat-box h4:before {
    content: '';
    width: 40px;
    height: 4px;
    background-color: var(--main-color);
    position: absolute;
    left: 50%;
    margin-left: -20px;
    bottom: -22px;
  }
  .features .feat-box p {
    width: 80%;
    margin: 0 auto;
    line-height: 1.7;
    color: #706f6f;
  }
  /* End Features */
  /* Start Testimonials */
  .testimonials {
    position: relative;
    padding-top: 80px;
    padding-bottom: 80px;
  }
  .testimonials:before {
    content: '';
    width: 50%;
    position: absolute;
    left: 0;
    top: 0;
    background-color: var(--main-color);
    height: 100%;
  }
  .testimonials:after {
    content: '';
    width: 50%;
    position: absolute;
    right: 0;
    top: 0;
    background-color: #333;
    height: 100%;
  }
  .testimonials h2 {
    font-weight: bold;
    font-size: 30px;
    color: #FFF;
    margin: 0 0 30px;
    text-align: left;
    position: relative;
    z-index: 2;
  }
  @media (max-width: 767px) {
    .testimonials h2 {
      text-align: center;
    }
  }
  .testimonials .ts-box {
    position: relative;
    z-index: 2;
    width: calc(98% / 3);
    float: left;
    background-color: #FFF;
    padding: 20px;
  }
  @media (max-width: 767px) {
    .testimonials .ts-box {
      width: 100%;
      float: none;
      margin-bottom: 10px;
    }
  }
  .testimonials .ts-box:not(:last-of-type) {
    margin-right: 1%;
  }
  .testimonials .ts-box > p {
    margin: 0 0 20px;
    line-height: 1.5;
    font-size: 15px;
    color: #707070;
    font-style: italic;  
  }
  .testimonials .ts-box .person-info {
    overflow: hidden;
  }
  @media (max-width: 991px) {
    .testimonials .ts-box .person-info {
      text-align: center;
      overflow: visible;
    }
  }
  .testimonials .ts-box .person-info img {
    float: left;
    border-radius: 50%;
    margin-right: 20px;
  }
  @media (max-width: 991px) {
    .testimonials .ts-box .person-info img {
      float: none;
      margin-right: 0;
    }
  }
  .testimonials .ts-box .person-info h4 {
    margin: 14px 0 10px;
  }
  .testimonials .ts-box .person-info p {
    color: #707070;
    margin: 0;
  }
  /* End Testimonials */
  /* Start Contact Us */
  .contact {
    min-height: 600px;
    background-image: url('../imgs/contact.png');
    background-size: cover;
    padding-top: 80px;
    padding-bottom: 80px;
    position: relative;
  }
  .contact .overlay {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, .6);
    /* background-color: rgb(255 255 255 / 60%); */
  }
  .contact .container {
    position: relative;
    z-index: 2;
  }
  .contact h2 {
    font-weight: bold;
    font-size: 30px;
    color: var(--main-color);
    margin: 0 0 60px;
    text-align: center; 
  }
  .contact form {
    overflow: hidden;
    max-width: 800px;
    margin: auto;
  }
  .contact form .left {
    float: left;
    width: 49%;
  }
  .contact form .right {
    float: right;
    width: 49%;
  }
  @media (max-width: 767px) {
    .contact form .left,
    .contact form .right {
      float: none;
      width: 100%;
    }
  }
  .contact form input:not([type="submit"]),
  .contact form textarea {
    display: block;
    width: 100%;
    padding: 10px;
    margin-bottom: 15px;
    border: 1px solid #CCC;
    background-color: rgba(218, 218, 218, 0.19);
  }
  .contact form input:not([type="submit"]):focus,
  .contact form textarea:focus { 
    outline: 1px solid var(--main-color);
  }
  .contact form input {
    height: 40px;
  }
  .contact form textarea {
    height: 150px;
  }
  .contact form input[type="submit"] {
    padding: 10px;
    width: 100%;
    border-color: transparent;
    background-color: var(--main-color);
    color: #FFF;
    cursor: pointer;
  }
  .contact form textarea:focus::-webkit-input-placeholder,
  .contact form input:not([type="submit"]):focus::-webkit-input-placeholder {
    opacity: 0;
    transition: .3s;
  }
  .contact form textarea:focus:-ms-input-placeholder,
  .contact form input:not([type="submit"]):focus:-ms-input-placeholder {
    opacity: 0;
    transition: .3s;
  }
  .contact form textarea:focus::placeholder,
  .contact form input:not([type="submit"]):focus::placeholder {
    opacity: 0;
    transition: .3s;
  }
  /* End Contact Us */
  /* Start Footer */
  .footer {
    background-color: #333;
    color: #EEE;
    padding: 20px;
    text-align: center;
  }
  /* End Footer */
  /* Start Grid System */
  @media (min-width: 576px) { /* Small Devices => Landscape Phones */
    .container {
      max-width: 540px;
    }
  }
  @media (min-width: 768px) { /* Medium Devices => Tablets */
    .container {
      max-width: 720px;
    }
  }
  @media (min-width: 992px) { /* Desktops */
    .container {
      max-width: 960px;
    }
  }
  @media (min-width: 1200px) { /* Large Screens */
    .container {
      max-width: 1140px;
    }
  }
  /* End Grid System */