:root {
  --bs-blue: #002f60;
  --bs-yellow: #fdb515;
  --bs-dark-gray: #333f48;
  --bs-lower-dark-gray: #5b656c;
  --bs-middle-gray: #d6f8f9;
  --bs-white: white;
  --bs-gray: #eff5f5;
  --bs-dark-yellow: #e8aa42;

  --bs-font-sans-serif: "Libre Franklin", Roboto, "Helvetica Neue", Arial,
    "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji",
    "Segoe UI Symbol", "Noto Color Emoji";
  --bs-body-font-family: var(--bs-font-sans-serif);
  --bs-body-font-size: 1rem;
  --bs-body-font-weight: 400;
  --bs-body-line-height: 1.5;
}

body {
  font-family: var(--bs-body-font-family);
}

a:hover {
  text-decoration: none;
}

h3 {
  font-size: 22px;
  font-weight: 600;
}

h4 {
  font-size: 15px;
}

.title-text {
  color: var(--bs-blue);
  font-weight: 600;
  font-size: 35px;
}

#background-nav {
  background-color: #002f60;
  height: 15px;
}

#brand a {
  background-color: var(--bs-blue);
  border-radius: 5px;
  border-style: none;
  box-sizing: border-box;
  color: #ffffff;
  cursor: pointer;
  display: inline-block;
  font-family: var(--bs-body-font-family);
  font-size: 20px;
  font-weight: 700;
  height: 40px;
  line-height: 20px;
  list-style: none;
  margin: 0;
  outline: none;
  padding: 10px 16px;
  position: relative;
  text-align: center;
  text-decoration: none;
  transition: color 100ms;
  vertical-align: baseline;
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
}

#logo {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%;

}

#logo a {
  border-style: none;
  cursor: pointer;
  display: inline-block;
  list-style: none;
  margin: 0 auto;
  color: var(--bs-blue);
  font-weight: bold;
}

#logo a:hover{
  color: var(--bs-dark-yellow);
  transition: 0.3s;
}


#brand a:hover,
#brand a:focus {
  background-color: var(--bs-dark-gray);
}

#nav-bar-header {
  position: fixed;
  width: 100vw;
  z-index: 1;
  opacity: 0;
  transition: all 0.4s ease;
}

#hamburger-icon {
  margin: auto 0;
  display: none;
  cursor: pointer;
}

#hamburger-icon div {
  width: 35px;
  height: 3px;
  background-color: var(--bs-dark-gray);
  margin: 6px 0;
  transition: 0.4s;
}

.open .bar1 {
  -webkit-transform: rotate(-45deg) translate(-6px, 6px);
  transform: rotate(-45deg) translate(-6px, 6px);
}

.open .bar2 {
  opacity: 0;
}

.open .bar3 {
  -webkit-transform: rotate(45deg) translate(-6px, -8px);
  transform: rotate(45deg) translate(-6px, -8px);
}

header a {
  text-decoration: none;
}

header a:hover {
  text-decoration: none;
}

header {
  padding: 0 20px;
  background-color: var(--bs-gray);
  height: 100px;
  display: flex;
  justify-content: space-between;
}

#brand {
  font-weight: bold;
  font-size: 18px;
  display: flex;
  align-items: center;
  margin-left: 52px;
}

#brand a {
  color: white;
  border-radius: 5px;
  background-color: #002f60;
  padding: 10px;
}

ul {
  list-style: none;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-around;
}

ul a {
  color: var(--bs-dark-gray);
  text-decoration: none;
  /* color: black; */
}

ul a:hover {
  color: black;
  text-decoration: none;
}
ul li {
  padding: 5px;
  margin-left: 10px;
}

ul li:hover {
  transform: scale(1.1);
  transition: 0.3s;
}

.mobile-menu {
  display: none;
  position: absolute;
  top: 50px;
  left: 0;
  height: calc(100vh - 50px);
  width: 100%;
}

.open .mobile-menu {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
}

.mobile-menu li {
  margin-bottom: 10px;
}

@media only screen and (max-width: 600px) {
  header nav {
    display: none;
  }

  #hamburger-icon {
    display: block;
  }
}

/* NAV */

.banner {
  height: 100vh;
  width: 100%;

  background: url("../image/bg-image.png") no-repeat;
  background-size: cover;

  position: relative;
  color: white !important;
}

.banner-quote {
  top: 50%;
  left: 75px;
  position: absolute;
}

.scroll-down {
  display: none;
  position: absolute;
  left: 50%;
  bottom: 10px;
  text-align: center;
  font-size: 20px;
  z-index: 100;
  text-decoration: none;
  text-shadow: 0;
  width: 13px;
  height: 13px;
  border-bottom: 2px solid #fff;
  border-right: 2px solid #fff;
  z-index: 9;
  left: 50%;
  -webkit-transform: translate(-50%, 0%) rotate(45deg);
  -moz-transform: translate(-50%, 0%) rotate(45deg);
  transform: translate(-50%, 0%) rotate(45deg);
  -webkit-animation: fade_move_down 4s ease-in-out infinite;
  -moz-animation: fade_move_down 4s ease-in-out infinite;
  animation: fade_move_down 4s ease-in-out infinite;
}

/*animated scroll arrow animation*/
@-webkit-keyframes fade_move_down {
  0% {
    -webkit-transform: translate(0, -10px) rotate(45deg);
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  100% {
    -webkit-transform: translate(0, 10px) rotate(45deg);
    opacity: 0;
  }
}
@-moz-keyframes fade_move_down {
  0% {
    -moz-transform: translate(0, -10px) rotate(45deg);
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  100% {
    -moz-transform: translate(0, 10px) rotate(45deg);
    opacity: 0;
  }
}
@keyframes fade_move_down {
  0% {
    transform: translate(0, -10px) rotate(45deg);
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  100% {
    transform: translate(0, 10px) rotate(45deg);
    opacity: 0;
  }
}

.type {
  color: #0000;
  background: linear-gradient(-90deg, white 5px, #0000 0) 10px 0,
    linear-gradient(white 0 0) 0 0;
  background-size: calc(var(--n) * 1ch) 200%;
  -webkit-background-clip: padding-box, text;
  background-clip: padding-box, text;
  background-repeat: no-repeat;
  animation: b 0.2s infinite steps(1),
    t calc(var(--n) * 0.1s) steps(var(--n)) forwards;
}

@keyframes t {
  from {
    background-size: 0 200%;
  }
}
@keyframes b {
  50% {
    background-position: 0 -100%, 0 0;
  }
}

.banner label {
  font-size: 2rem;
  margin-bottom: 0.5rem;
  font-weight: 500;
  line-height: 1.2;
}

.banner-quote a {
  color: white;
  text-decoration: none;
}

.banner-quote a:hover {
  color: var(--bs-middle-gray);
}

.register:hover {
  transform: translateY(-2px);
  transition: 0.3s;
}

.banner hr {
  border: 0;
  border-top: 4px solid white;
  margin-left: 0;
}

.fa-arrow-right {
  margin-left: 20px;
}

#intro-vietalk,
#whyVT,
#ask-question,
#testimonials,
#need-help {
  padding: 40px 80px 20px 80px;
}

hr {
  border: 0;
  border-top: 4px solid var(--bs-blue);
  width: 100px;
  margin-left: 0;
}

.outer-row {
  margin-left: 0;
  margin-right: 0;
  display: flex;
  justify-content: center;
}

#intro-vietalk p {
  color: black;
}

#intro-vietalk img {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 400px;
  transition: transform 250ms;
}

#whyVT {
  background-color: var(--bs-gray);
}

#whyVT .card {
  padding: 10px 30px 30px;
  margin: 20px 80px 20px 0;
  border-radius: 10px;
}

#whyVT .card .hashtags {
  margin: 10px 0 22px 12px;
  border-radius: 10px;
  padding: 2px 7px;
}

#ask-question {
  min-height: 250px;
  background-image: url("../image/vietalk-ask-questions.png");
  color: #002f60;
}

.button-information {
  padding: 20px 30px;
  background-color: #002f60;
  color: white;
  margin-right: 70px;
  /* margin-left: 10px; */
  border-radius: 5px;
  border: none;
  margin-top: 10px;
}

.button-information:hover {
  text-decoration: none;
  transform: scale(1.1);
  transition: 0.3s;
}
.button-information a:hover {
  color: white;
}

.button-row {
  margin-top: 20px;
  margin-left: 0 !important;
}

#whyVT p {
  margin-top: 20px;
}

.testimonials-row {
  margin-left: 0;
}
#need-help {
  background-color: var(--bs-gray);
}

#need-help .bg-dark-gray h2 {
  color: white;
}

#need-help hr {
  border-top: 4px solid #fdb515;
}
#need-help .card {
  padding: 40px 40px 20px 40px;
  margin-right: 90px;
  margin-top: 20px;
  margin-bottom: 40px;
  max-width: 500px;
  height: 357;
  border-radius: 5px;
}
#need-help a {
  margin-top: 10px;
  font-weight: 600;
}

#need-help a:hover {
  text-decoration: none;
}

#need-help p {
  margin-top: 10px;
}

.bg-blue {
  background-color: var(--bs-blue);
  color: white;
}
.bg-yellow {
  background-color: var(--bs-dark-yellow);
  color: white;
}
.bg-dark-gray {
  background-color: var(--bs-dark-gray);
  color: white;
}
.bg-dark-gray a {
  color: white;
}
.bg-dark-gray a:hover {
  color: var(--bs-middle-gray);
  transform: translateY(-2px);
  transition: 0.3s;
}

.bg-white {
  background-color: white;
  color: #333f48;
}
.bg-white a,
.bg-white h2 {
  color: #333f48;
}

.bg-white a:hover {
  color: black;
  transform: translateY(-2px);
  transition: 0.3s;
}

.bg-hashtags-blue {
  background-color: white;
  color: #002f60;
}
.bg-hashtags-dark-gray {
  background-color: white;
  color: #333f48;
}
.bg-hashtags-yellow {
  background-color: white;
  color: #fdb515;
}

footer {
  width: 100%;
  bottom: 0;
  left: 0;
  background: var(--bs-blue);
  position: relative;
}

footer .content {
  /* max-width: 1350px; */
  margin: auto;
  padding: 20px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
}
footer .content p,
a {
  color: #fff;
}
footer .content .box {
  transition: all 0.4s ease;
}
footer .content .topic {
  font-size: 22px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
}

footer .content .left {
  margin-left: 65px;
}
footer .content .middle {
  width: 33%;
}

footer .content .right,
.middle {
  display: flex;
  justify-content: center;
  align-items: center;
}

footer .content .media-icons a {
  font-size: 16px;
  height: 45px;
  width: 45px;
  display: inline-block;
  text-align: center;
  line-height: 43px;
  border-radius: 5px;
  border: 2px solid white;
  margin: 0 5px 0 0;
  transition: all 0.3s ease;
}
.content .media-icons a:hover {
  border-color: #ccd6e1;
}

footer a {
  transition: all 0.3s ease;
}
footer a:hover {
  color: #ccd6e1;
  text-decoration: none;
}

.fade-in {
  animation: fadeIn 2s;
}

@keyframes fadeIn {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}

/* mobile view */

@media screen and (max-width: 900px) {
  #brand a {
    font-size: 15px;
  }
  #brand {
    margin-left: 15px;
  }

  header {
    padding: 0 10px;
    background-color: var(--bs-gray);
    height: 100px;
    display: flex;
    justify-content: space-between;
  }

  #banner-div label {
    font-size: 25px;
  }

  .banner {
    background-position: 25% 40%;
  }

  #intro-vietalk p {
    font-size: 15px;
  }
  #intro-vietalk img {
    width: 300px;
  }

  /* .title-text {
    font-size: 27px;
  } */

  #intro-vietalk,
  #whyVT,
  #ask-question,
  #testimonials,
  #need-help {
    padding: 40px 25px 25px 25px;
  }

  #need-help .card {
    margin-right: 15px;
  }

  #whyVT .card {
    margin-right: 20px;
    min-height: 100px;
  }
}

@media screen and (max-width: 530px) {
  .outer-row {
    display: block;
  }
}

/* tablet view  */

@media screen and (min-width: 775px) and (max-width: 1200px) {
  #whyVT .card {
    min-width: 200px;
    margin-right: 20px;
    min-height: 200px;
  }

  #whyVT {
    padding-right: 30px;
  }
  #whyVT h3 {
    font-size: 20px;
  }

  #whyVT p {
    font-size: 15px;
  }

  .hashtags {
    margin-left: 8px !important;
  }

  .title-text {
    font-size: 32px;
  }

  #need-help .card {
    /* padding: 40px 20px 20px 40px; */
    margin-right: 20px;
  }

  #testimonials .card {
    margin-right: 30px;
    min-width: 250px;
  }
}

@media (max-width: 950px) {
  .content .right {
    margin-top: 40px;
  }
}
@media (max-width: 950px) {
  footer {
    position: relative;
  }
  footer .content .box {
    width: 100%;
    margin-top: 30px;
  }
  footer .content .middle {
    padding-left: 0;
  }
}