:root {
  --color1: #3ea337;
  --color2: #4383b6;
  --color3: #833d89;
  --color4: #00c1de;
  --color5: #f3a974;
  --color6: #f8bf42;
  --primary: #f76b1c;
  --secondary: #fee8dc;
  --gray-0: #f1f1f1;
  --gray-1: #e5e5e5;
  --gray-2: #989898;
  --gray-3: #b2b2b2;
}

body {
  display: flex;
  flex-flow: column nowrap;
  min-height: 100vh;
}

main {
  flex: 1;
  display: flex;
}

img {
  display: block;
  width: 100%;
}

.pc,
.user {
  display: none;
}

.mobile.active {
  position: fixed;
  top: 0;
  z-index: 999;
  width: 100%;
  background-color: white;
}

.sp_menu.active {
  display: flex;
  flex-flow: column wrap;
  background-color: var(--secondary);
  min-height: 100vh;
}

.sp_menu li a {
  box-sizing: border-box;
  display: flex;
  flex-flow: row wrap;
  align-items: center;
  gap: 20px;
  padding: 20px;
  border-bottom: 2px solid var(--gray-1);
}

.sp_menu a img {
  width: 15px;
}

.user {
  flex-flow: row wrap;
  justify-content: flex-end;
  align-items: center;
}

.user_box {
  display: flex;
  flex-flow: column wrap;
  justify-content: center;
  align-items: center;
  gap: 20px;
  padding-top: 50px;
}

.logout_btn {
  display: flex;
  width: 200px;
  gap: 10px;
  color: white;
  background-color: var(--primary);
  justify-content: center;
  padding: 5px 0;
  margin-left: 10px;
  border: none;
  align-items: center;
  cursor: pointer;
}

.sp_logout {
  padding: 20px;
}

.top_icon {
  width: 5px;
}

.nav_bar {
  display: flex;
  justify-content: space-between;
}

.nav_bar img {
  width: 170px;
  padding: 10px;
}

.menu_btn {
  border: none;
  background-color: var(--primary);
}

.menu_icon .menu_open,
.menu_icon .menu_close {
  width: 30px;
}

.menu_close,
.sp_menu {
  display: none;
}

.menu_close.active,
.sp_menu.active {
  display: block;
}

.menu_open.active {
  display: none;
}

.hero_img {
  background-color: var(--secondary);
  padding: 20px 10px 0;
}

.pc_menu ul {
  display: flex;
  flex-flow: row wrap;
  background-color: var(--primary);
  height: 72px;
  justify-content: center;
  align-items: center;
  gap: 10px;
  text-align: center;
}

.pc_menu li {
  flex-basis: 15%;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 5px;
  color: white;
  display: block;
}

.pc_menu li.logo {
  background-color: transparent;
}

.pc_menu li:hover {
  background-color: rgba(0, 0, 0, 0.1);
}

.pc_menu li a {
  display: inline-block;
  width: 100%;
  height: 100%;
  padding: 5px 0;
}

.en_title {
  font-weight: 900;
  line-height: 1.6;
}

.ja_title {
  font-size: 0.8rem;
}

.pc_menu .selected {
  background-color: var(--color6);
}

.sticky {
  display: none;
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 99;
}

.pc_menu li.logo {
  display: none;
}

.pc_menu li.logo.sticky_logo {
  display: block;
}

.notification {
  display: flex;
  flex-flow: row wrap;
  justify-content: center;
  align-items: center;
  gap: 10px;
}

.unread {
  background-color: white;
  padding: 10px;
  border-radius: 50%;
  color: var(--primary);
  font-size: 0.9rem;
  font-weight: bolder;
}

.selected .unread {
  background-color: var(--primary);
  color: white;
}

.latest_msg_date .unread {
  background-color: var(--primary);
  color: white;
}

.no_unread {
  display: none;
}

.login_section {
  display: flex;
  flex-flow: column wrap;
  background-color: var(--primary);
  align-items: center;
  padding: 20px 40px;
  box-sizing: border-box;
  width: 100%;
  justify-content: center;
}

.login_header {
  display: flex;
  flex-flow: column wrap;
  color: white;
  align-items: center;
  padding-bottom: 30px;
}

.login_header h1 {
  font-size: 1.5rem;
  font-weight: 900;
  line-height: 1.6;
}

.login_header p {
  font-size: 0.6rem;
}

.login_form {
  display: flex;
  flex-flow: column wrap;
  width: 100%;
  box-sizing: border-box;
  background-color: white;
  padding: 20px;
  border-radius: 20px;
  max-width: 400px;
}

.text_input {
  border: 1px solid var(--gray-1);
  padding: 10px;
  border-radius: 10px;
  text-align: center;
}

.submit_btn {
  border: none;
  background-color: var(--primary);
  padding: 10px 0;
  color: white;
  border-radius: 20px;
  margin: 30px 0;
}

.input_field {
  display: flex;
  flex-flow: column wrap;
  margin: 10px 0;
}

.input_field label {
  font-size: 0.7rem;
  margin-bottom: 10px;
}

.other_option {
  display: flex;
  flex-flow: column wrap;
  gap: 10px;
  align-items: center;
  font-size: 0.8rem;
  margin: 20px 0;
}

.other_option a {
  color: var(--color4);
  cursor: pointer;
}

footer {
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: var(--primary);
  color: white;
  padding: 10px 0;
  font-weight: 500;
}

footer p {
  font-size: 0.7rem;
}

@media (min-width: 768px) {
  .mobile {
    display: none;
  }

  .pc {
    display: block;
  }

  .sticky {
    display: block;
  }

  .user {
    display: flex;
  }

  nav {
    display: block;
  }
}