.aihtmlcoding-subnav {
  position: absolute;
  top: 100px;
  left: 0;
  z-index: 100;
  width: 100%;
  border-bottom: 1px solid #e7e7e7;
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 7px 22px rgba(19, 25, 70, 0.16);
  color: #131946;
  font-family: "Noto Sans JP", sans-serif;
}

.aihtmlcoding-subnav__inner {
  display: flex;
  align-items: stretch;
  width: min(100%, 1600px);
  min-height: 58px;
  margin: 0 auto;
  padding-left: clamp(20px, 3vw, 48px);
}

.aihtmlcoding-subnav__brand {
  display: flex;
  flex: 0 0 auto;
  flex-direction: column;
  justify-content: center;
  width: 242px;
  padding: 7px 24px 7px 0;
  color: #131946;
  line-height: 1.25;
  text-decoration: none;
}

.aihtmlcoding-subnav__brand-kicker {
  color: #ea2125;
  font-family: Arial, sans-serif;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.14em;
}

.aihtmlcoding-subnav__brand-name {
  margin-top: 3px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.015em;
  white-space: nowrap;
}

.aihtmlcoding-subnav__list {
  display: flex;
  flex: 1 1 auto;
  align-items: stretch;
  justify-content: center;
  min-width: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.aihtmlcoding-subnav__item {
  display: flex;
  flex: 1 1 auto;
  align-items: stretch;
  justify-content: center;
  max-width: 146px;
}

.aihtmlcoding-subnav__link {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 8px 10px;
  color: #30334f;
  font-size: 12px;
  font-weight: 600;
  line-height: 1.45;
  text-align: center;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s ease, background-color 0.2s ease;
}

.aihtmlcoding-subnav__link::after {
  content: "";
  position: absolute;
  right: 10px;
  bottom: 0;
  left: 10px;
  height: 3px;
  background: #ea2125;
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.2s ease;
}

.aihtmlcoding-subnav__link:hover,
.aihtmlcoding-subnav__link:focus-visible,
.aihtmlcoding-subnav__link.is-current {
  color: #ea2125;
  background: #fff7f7;
}

.aihtmlcoding-subnav__link:hover::after,
.aihtmlcoding-subnav__link:focus-visible::after,
.aihtmlcoding-subnav__link.is-current::after {
  transform: scaleX(1);
}

.aihtmlcoding-subnav__cta {
  display: flex;
  flex: 0 0 194px;
  align-items: center;
  justify-content: center;
  padding: 8px 20px;
  background: #131946;
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  line-height: 1.45;
  text-align: center;
  text-decoration: none;
  transition: background-color 0.2s ease;
}

.aihtmlcoding-subnav__cta span::after {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin: 0 0 1px 8px;
  border-top: 1px solid currentColor;
  border-right: 1px solid currentColor;
  transform: rotate(45deg);
}

.aihtmlcoding-subnav__cta:hover,
.aihtmlcoding-subnav__cta:focus-visible {
  background: #ea2125;
}

@media (min-width: 1300px) {
  .aihtmlcoding-subnav + main {
    padding-top: 18px;
  }
}

@media (max-width: 1199.98px) {
  .aihtmlcoding-subnav {
    overflow-x: auto;
    overscroll-behavior-inline: contain;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }

  .aihtmlcoding-subnav::-webkit-scrollbar {
    display: none;
  }

  .aihtmlcoding-subnav__inner {
    min-width: 940px;
  }

  .aihtmlcoding-subnav__brand {
    width: 196px;
  }

  .aihtmlcoding-subnav__brand-name {
    font-size: 12px;
  }

  .aihtmlcoding-subnav__link {
    padding-right: 8px;
    padding-left: 8px;
    font-size: 11px;
  }

  .aihtmlcoding-subnav__cta {
    flex-basis: 170px;
    padding-right: 12px;
    padding-left: 12px;
    font-size: 11px;
  }
}

@media (min-width: 768px) and (max-width: 1299.98px) {
  .aihtmlcoding-subnav {
    top: 70px;
  }
}

@media (max-width: 767.98px) {
  .aihtmlcoding-subnav {
    display: none;
  }

  .header-navigation .aihtmlcoding-mobile-submenu {
    margin-top: 0;
  }

  .header-navigation .aihtmlcoding-mobile-submenu a {
    position: relative;
    padding-left: 1.4rem;
  }

  .header-navigation .aihtmlcoding-mobile-submenu a::before {
    content: "";
    position: absolute;
    top: 50%;
    left: 0;
    width: 0;
    height: 0;
    margin-top: -0.4rem;
    border-top: 0.4rem solid transparent;
    border-bottom: 0.4rem solid transparent;
    border-left: 0.6rem solid currentColor;
  }
}