html, body {
    height: 100%;
    margin: 0;
}
body {
  background-color: #f7fafc;
  font-family: 'Noto Sans JP', sans-serif;
  display: flex;
  flex-direction: column;
}
#container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}
.footer {
    background: #2c3e50;
    color: #fff;
    text-align: center;
    padding: 1em 0;
    margin-top: auto;
    font-size: 0.8em;
}
.footer p {
    margin: 0.5em 0;
}
.footer a {
    color: #4fd1c5;
    text-decoration: none;
    margin: 0 0.5em;
}
.footer a:hover {
    text-decoration: underline;
}

#main {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-grow: 1;
    padding: 2em 0;
}

/* Auth Pages specific styles */
.auth-container {
  background: #fff;
  border-radius: 1.2em;
  box-shadow: 0 5px 25px rgba(0,0,0,0.1);
  padding: 3em 2.5em;
  max-width: 460px;
  width: 90%;
  margin: 0 auto;
}
.auth-title {
  color: #2d3748;
  font-size: 2em;
  font-weight: 700;
  margin-bottom: 1.5em;
  text-align: center;
}
.auth-form {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 1.2em;
  text-align: left;
}
.auth-form label {
  color: #4b5563;
  font-size: 1em;
  font-weight: 500;
  margin-bottom: 0.4em;
  display: block;
}
.auth-form input,
.auth-form button {
  width: 100%;
  padding: 0.9em 1.2em;
  font-size: 1.05em;
  border-radius: 0.6em;
  box-sizing: border-box;
  border: 1px solid #d1d5db;
}
.auth-form input {
  background: #fff;
  color: #111827;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.auth-form input:focus {
  outline: none;
  border-color: #4fd1c5;
  box-shadow: 0 0 0 3px rgba(79, 209, 197, 0.3);
}
.auth-form button {
  background: #4fd1c5;
  color: #fff;
  font-weight: 700;
  cursor: pointer;
  border: none;
  transition: background-color 0.2s, transform 0.1s;
}
.auth-form button:hover {
  background: #38b2ac;
  transform: translateY(-2px);
}
.auth-error {
  color: #c53030;
  background: #fed7d7;
  border: 1px solid #fbb6b6;
  border-radius: 0.6em;
  padding: 0.9em 1.2em;
  margin-bottom: 1.2em;
  text-align: center;
  font-size: 1.05em;
}
.auth-links {
  margin-top: 1.5em;
  text-align: center;
  font-size: 0.95em;
}
.auth-links a {
  color: #4fd1c5;
  text-decoration: none;
  font-weight: 500;
}
.auth-links a:hover {
  text-decoration: underline;
}
.auth-separator {
  color: #9ca3af;
  margin: 0 0.5em;
  font-weight: 300;
}
/* For logout, reset pages */
.auth-message {
  color: #6b7280;
  margin-bottom: 1.5em;
  font-size: 1.2em;
  line-height: 1.6;
  text-align: center;
}
.auth-link {
  color: #4fd1c5;
  text-decoration: none;
  font-weight: 500;
  font-size: 1.2em;
}
.auth-link:hover {
    text-decoration: underline;
}

.auth-message {
  border-radius: 0.6em;
  padding: 0.9em 1.2em;
  margin-bottom: 1.2em;
  text-align: center;
  font-size: 1.05em;
}

.auth-success {
  color: #22543d;
  background: #c6f6d5;
  border: 1px solid #9ae6b4;
}

.auth-info {
  color: #2c5282;
  background: #bee3f8;
  border: 1px solid #90cdf4;
}

.auth-warning {
  color: #744210;
  background: #faf089;
  border: 1px solid #f6e05e;
}