:root {
  --color-theme: #f2f5f8;
  --color-white: #ffffff;
  --color-font: #212529;
  --color-sub: #e0b269;
  --color-border: #497bb0;
  --color-object: #5b86bc;

  --font-size-hero-main: 2.5rem;
  --font-size-hero-sub: 1.5rem;
  --font-size-headline: 1.875rem;
  --font-size-sub: 1.5rem;
  --font-size-sub-content: 1.2rem;
}

body {
  font-family: serif;
  line-height: 2rem;
}

.h1,
.h2,
.h3,
.h4,
.h5,
.h6,
h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0 !important;
}

a {
  color: var(--color-object);
}

a:hover {
  color: var(--color-object) !important;
}

.card {
  border-radius: 8px !important;
  height: 100%;
}

dl,
ol,
ul,
p {
  margin: 0 !important;
}

ol,
ul {
  padding-left: 1rem;
}

.navbar-brand {
  font-size: 1.8rem;
}

section {
  padding: 80px 0;
}

section.banner {
  padding: 40px 0;
}

section h2 {
  font-size: var(--font-size-headline);
}

.banner-image img {
  border: 1px solid var(--color-border);
}

.bg-theme-color {
  background: var(--color-theme);
}

footer {
  background-color: var(--color-object);
  color: var(--color-white);
}

.strong-line {
  font-weight: 600;
  border-bottom: 1px solid #c00;
  padding-bottom: 4px;
}

.btn-default {
  background-color: var(--color-sub);
  color: var(--color-white);
}

.nav-link {
  color: var(--color-font) !important;
}

.hero {
  background-image: url("../images/main_image.png");
  background-repeat: no-repeat;
  background-position: center;
  background-size: cover;
  /* height: 400px; */
  color: var(--color-white);
}

.hero .main-text {
  font-size: var(--font-size-hero-main);
}
.hero .sub-text {
  font-size: var(--font-size-hero-sub);
}

.training .description {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  padding: 20px;
}

.banner-image img {
  width: 100%;
}

.table th {
  width: 200px;
  text-align: center;
}

.class-type .headline {
  position: relative;
  overflow: hidden;
  padding: 15px 20px 15px 130px;
  border: 1px solid var(--color-border);
  font-size: var(--font-size-sub);
}

.class-type .headline:before {
  position: absolute;
  top: -150%;
  left: -100px;
  width: 200px;
  height: 300%;
  content: "";
  -webkit-transform: rotate(25deg);
  transform: rotate(25deg);
  background: var(--color-object);
}

.class-type .headline span {
  font-size: var(--font-size-sub);
  position: absolute;
  z-index: 1;
  top: 0;
  left: 0;
  display: block;
  padding: 15px 30px;
  color: #fff;
}

.class-type .description {
  margin-top: -1px;
  border: 1px solid var(--color-border);
  padding: 20px;
}

.class-type h4 {
  font-size: var(--font-size-sub-content);
  padding-bottom: 10px;
}

.sample h3 {
  font-size: var(--font-size-sub-content);
}

.case .headline,
.publication .headline {
  border: 1px solid var(--color-border);
  padding: 15px 0;
  background-color: var(--color-object);
  color: var(--color-white);
  font-size: var(--font-size-sub);
}
.case .case-list,
.publication .case-list {
  border: 1px solid var(--color-border);
  padding: 20px;
  margin-top: -1px;
  background-color: var(--color-white);
}

.contact .btn-contact {
  border: 1px solid var(--color-border);
  border-radius: 0;
  background-color: var(--color-white);
  padding: 15px 80px;
  color: var(--color-font);
}

.contact .btn-contact:hover {
  background-color: var(--color-object);
  color: var(--color-white) !important;
}

.navbar-toggler {
  border: 0;
  width: 20px;
  height: 20px;
  position: relative;
  transition: 0.5s ease-in-out;
}

.navbar-toggler,
.navbar-toggler:focus,
.navbar-toggler:active,
.navbar-toggler-icon:focus {
  outline: none;
  box-shadow: none;
  border: 0;
}

.navbar-toggler span {
  margin: 0;
  padding: 0;
}

.toggler-icon {
  display: block;
  position: absolute;
  height: 2px;
  width: 100%;
  background-color: var(--color-font);
  border-radius: 1px;
  opacity: 1;
  left: 0;
  transform: rotate(0);
  transition: 0.25s ease-in-out;
}

.middle-bar {
  margin-top: 0;
}

.navbar-toggler .top-bar {
  margin-top: 0;
  transform: rotate(45deg);
}

.navbar-toggler .middle-bar {
  opacity: 0;
  filter: alpha(opacity=0);
}

.navbar-toggler .bottom-bar {
  margin-top: 0;
  transform: rotate(-45deg);
}

.navbar-toggler.collapsed .top-bar {
  margin-top: -15px;
  transform: rotate(0);
}

.navbar-toggler.collapsed .middle-bar {
  opacity: 1;
  filter: alpha(opacity=100);
}

.navbar-toggler.collapsed .bottom-bar {
  margin-top: 14px;
  transform: rotate(0);
}

@media (min-width: 1200px) {
  .container,
  .container-lg,
  .container-md,
  .container-sm,
  .container-xl {
    max-width: 1064px;
  }

  .pc-none {
    display: none;
  }
}

@media screen and (max-width: 767px) {
  :root {
    --font-size-hero-main: 1.875rem;
    --font-size-hero-sub: 1.125rem;
    --font-size-headline: 1.5rem;
    --font-size-sub: 1.125rem;
    --font-size-sub-content: 1.2rem;
  }

  .pc-none {
    display: inline-block;
  }

  body {
    font-size: 14px;
  }

  section {
    padding: 50px 0 !important;
  }

  section.banner {
    padding: 40px 0 20px !important;
  }

  .row {
    --bs-gutter-x: 0 !important;
  }

  .container {
    padding-left: 20px;
    padding-right: 20px;
  }

  .description {
    padding: 20px 15px !important;
  }

  .hero {
    /* background-attachment: fixed; */
  }

  .nav-link {
    /* padding: 1rem; */
    text-align: center;
  }

  .card {
    height: inherit;
  }

  .card:first-child {
    margin-bottom: 20px;
  }
  .sample .video:first-child {
    margin-bottom: 10px;
  }

  .m-text-left {
    text-align: left !important;
  }

  .table th,
  .table td {
    display: block;
  }

  .table th {
    border-bottom: 0;
    padding-bottom: 0;
    text-align: left;
  }

  .table td {
    padding-top: 0;
  }

  .hero {
    height: 500px;
  }

  .hero .py-5 {
    padding: 5rem 0 !important;
  }

  .contact .btn-list {
    flex-direction: column;
  }

  .training .meta {
    padding-left: 0 !important;
  }
}

@media (min-width: 992px) {
  .navbar-expand-lg .navbar-nav .nav-link {
    padding-right: 1rem;
    padding-left: 1rem;
  }
}