/* ======= hamburger menu ======= */

.hamburger-menu {
  position: relative;
}

.hamburger-button {
  position: relative;
  
  width: clamp(24px, 2rem, 40px);
  height: 40px;

  border: none;
  cursor: pointer;
  z-index: 10;
  display: block;
  background: transparent;
  
  padding-inline: 0;
  padding-block: 0;
  
  touch-action: manipulation;
  
  @media screen and (min-width:400px) {
    width: clamp(32px, 2.4rem, 48px);
  }
}

.hamburger-button:after {
  content: "メニュー";
  color: var(--green800);
  font-size: calc(2rem/4);
  letter-spacing: 0px;
  position: absolute;
  left: 0;
  
  @media screen and (min-width:400px) {
    font-size: calc(2.4rem/4);
  }
  
}

.hamburger-line {
  display: block;
  height: 4px;
  margin: 6px 0;
  background: var(--primary-color);
  border-radius: 2px;
  transition: all 0.4s;
}

.hamburger-menu.active{

  .hamburger-line:nth-child(1) {
    transform: translateY(10px) rotate(45deg);
  }

  .hamburger-line:nth-child(2) {
    opacity: 0;
  }

  .hamburger-line:nth-child(3) {
    transform: translateY(-10px) rotate(-45deg);
  }

}

.inside-hamburger-menu {
  display: flex;
  flex-direction: column;

  position: fixed;
  top: 0;
  right: 0;
  width: 100%;
  height: 100vh;
  background: #fff;
  transform: translateX(100%);
  transition: transform 0.4s ease;
  z-index: 3;
  
  ul {
    margin: 0;
    padding: 100px 0 0;
    list-style: none;
    width: 100vw;
  }
  
  li {
    padding: 0 20px;
  }
  
  a {
    display: block;
    padding: 15px 0;
    color: #333;
    font: var(--std-20B-150);
    text-decoration: none;
    border-bottom: 1px solid var(--secondary-color);
  }
  
  a:hover {
    color: #007bff;
  }
  
  > .lower-list {
    margin-top: 20px;
    padding-top: 0;
    display: flex;
    flex-direction: row;  
  }
  
  > .lower-list li {
    flex-grow: 1;
    text-align: center;
  }
  
  > .lower-list a {
    border-bottom: none;
    font: var(--oln-16B-100);
  }
  
}

.inside-hamburger-menu.active {
  transform: translateX(0);
}


.lower-list > li+li {
  border-left: 1px solid var(--secondary-color);
}


.pc-menu {
  display: none;
}

/* ======================================= */


/* ========== overlay backgound =============== */
.overlay {
  position: fixed;
  inset: 0;
  opacity: 10;
  pointer-events: none;
  z-index: 1;
  -webkit-backdrop-filter: blur(1px); /* Safari用 */
  backdrop-filter: blur(1px);
}

.overlay {
  display: none;
}

.overlay.active {
  display: block;
}

/* ================== */