.auth-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: calc(100vh - 140px);
  padding: 24px;
}

.auth-card {
  background: white;
  border-radius: 16px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  padding: 40px;
  width: 100%;
  max-width: 400px;
}

.auth-title {
  font-size: 1.75rem;
  color: #333;
  margin-bottom: 8px;
  text-align: center;
}

.auth-subtitle {
  color: #666;
  text-align: center;
  margin-bottom: 32px;
  font-size: 0.95rem;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: #444;
}

.form-input {
  padding: 14px 16px;
  border: 2px solid #e8e8e8;
  border-radius: 10px;
  font-size: 1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
  width: 100%;
}

.form-input:focus {
  outline: none;
  border-color: #4ECDC4;
  box-shadow: 0 0 0 3px rgba(78, 205, 196, 0.15);
}

.form-input::placeholder {
  color: #aaa;
}

.auth-submit {
  padding: 14px 24px;
  border: none;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
  margin-top: 8px;
}

.auth-submit:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.auth-submit:active {
  transform: translateY(0);
}

.auth-submit.sign-in {
  background-color: #4ECDC4;
  color: white;
}

.auth-submit.sign-up {
  background-color: #FF6B6B;
  color: white;
}

.auth-footer {
  text-align: center;
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid #eee;
  color: #666;
  font-size: 0.9rem;
}

.auth-footer a {
  color: #4ECDC4;
  text-decoration: none;
  font-weight: 600;
}

.auth-footer a:hover {
  text-decoration: underline;
}

.alert-message {
  background: #fee;
  color: #c33;
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 20px;
  font-size: 0.9rem;
}

.notice-message {
  background: #efe;
  color: #3c3;
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 20px;
  font-size: 0.9rem;
}

.alert-banner {
  background: #fee;
  color: #c33;
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 20px;
  font-size: 0.9rem;
  text-align: center;
}

.notice-banner {
  background: #efe;
  color: #3c3;
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 20px;
  font-size: 0.9rem;
  text-align: center;
}