body {
    background-color: #e6f7ff;  /* 淡く優しい水色 */
    margin: 0;
    font-family: "Segoe UI", sans-serif;
}
p {
    color: green;
}
/*2025/06/14追記*/
.main-container{
  background-color: #ffffff;
  max-width: 960px;
  width :90%;
  margin: 2rem auto;
  padding: 1rem;
  border-radius: 16px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
.auth-form{
  display: flex;
  flex-direction: column;
  gap:0.1rem;
  max-width: 400px;
  margin: 2rem auto;
  padding: 2rem;
  background: #ffffff;
  border-radius: 12px;
  /*box-shadow: 0 8px 20px rgba(0,0,0,0.1);*/
  font-family: 'Segoe UI',sans-serif;
}
.auth-form input{
  padding: 0.75rem 1rem;
  border: 1px solid #ccc;
  background-color: #cccccc3f;
  border-radius: 8px;
  font-size: 1rem;
  transition: border-color 0.3s, box-shadow 0.3s;
}
.auth-form input:focus {
  outline: none;
  border-color: #2bb1ff;
  box-shadow: 0 0 0 2px rgba(43, 177, 255, 0.2);
}
.auth-form input::placeholder {
  color: #666;
}
.auth-form button {
  padding: 0.75rem 1rem;
  background-color: #2bb1ff;
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  cursor: pointer;
  transition: background-color 0.3s;
}
.auth-form .reg-button {
  padding: 0.75rem 1rem;
  background-color: #ff322b;
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  cursor: pointer;
  transition: background-color 0.3s;
}
.auth-form button:hover {
  background-color: #68c8ff;
}
.auth-form .reg-button:hover {
  background-color: #eb211a;
}
.flashed-messages {
  color: #d8000c; /* 鮮やかな赤 */
  /*background-color: #ffdddd;*/ /* 優しい赤背景（任意） */
  /*padding: 1rem;*/
  list-style: none;
  /*border-radius: 8px;*/
  /*border: 1px solid #d8000c*/
}
.concept-message-container {
  text-align: left;
  font-size: 2rem;
  
  margin: 0rem 0;
}

.animated-text {
  color:#000;
  opacity: 0;
  transform: translateY(50px);
  animation: slideUp 1s ease-out forwards;
}

.delay-1 {
  animation-delay: 0.2s;
}
.delay-2 {
  animation-delay: 0.5s;
}
.delay-3 {
  animation-delay: 1.1s;
}
.delay-4 {
  animation-delay: 1.3s;
}

@keyframes slideUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}


.main-header {
    background-color: #4CAF50;
    padding: 10px 20px;
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: right;
  }
.main-header2 {
  display: flex;
  
  /*flex-direction: row;*/
  justify-content: space-between;  /* 両端に配置 */
  align-items: center;
  padding: 0.5rem 1rem;
  background-color: #ffffff;
  border-bottom: 4px solid #000;
}
.site-title {
    font-size: 30px;
    text-decoration: seashell;
    color: inherit;  /* h1の色を継承 */
    /*justify-content: space-between;*/
    margin: 0rem;
}
.auth-buttons{
  display: flex;
  gap :0.5rem;
}
/*.nav-links-reg a {
    color: black;
    margin-left: 15px;
    text-decoration: none;
    background-color: #41c74a;
    padding-top: 5px;
    padding-bottom: 5px;
}

.nav-links-reg a:hover {
    text-decoration: underline;
    color: blue
}
.nav-links-login a {
    color: black;
    margin-left: 15px;
    text-decoration: none;
    background-color: #c74141;
    padding-top: 5px;
    padding-bottom: 5px;
}
.nav-links-reg a:hover {
    text-decoration: underline;
    color: blue
}*/

/*.nav-links-reg,
.nav-links-login {
  margin-left: 1rem;
}

.nav-links-reg a{
  background-color: #41c74a;
  padding: 8px 16px;  
  text-decoration: none;
  border-radius: 6px;
  transition: background-color 0.3s ease;
  margin: 0 5px;
  color: #333;
  font-weight: bold;
}
.nav-links-login a {
  background-color: #c74141;
  padding: 8px 16px; 
  text-decoration: none;
  border-radius: 6px;
  transition: background-color 0.3s ease;
  margin: 0 5px;
  color: #333;
  font-weight: bold;
}


.nav-links-reg a:hover,
.nav-links-login a:hover {
  color: #0077cc;
}*/
.nav-links-reg a,
.nav-links-login a {
  background-color: #ff322b;
  color: rgb(256, 256, 256);
  padding: 10px 20px;
  margin-left: 1rem;
  font-size: 16px;
  font-weight: bold;
  text-decoration: none;
  border-radius: 8px;
  display: flex;
  margin: 0rem 8px;
  transition: 0.3s;
}

.nav-links-login a {
  background-color: #2bb1ff;
}

.nav-links-reg a:hover {
  background-color: #eb211a;
}

.nav-links-login a:hover {
  background-color: #68c8ff;
}
.main_footer {
    padding-left: 5px;
    align-items: center;
    color:rgba(175, 175, 175, 0.678)
}