* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Inter", "Microsoft JhengHei", "PingFang TC", sans-serif;
  background: #ffffff;
  color: #2d2d2d;
}

.carbon-login-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: #ffffff;
}

.carbon-login-card {
  width: 100%;
  max-width: 400px;
  background: #ffffff;
  border: 1px solid #e5e5e5;
  border-radius: 12px;
  padding: 40px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05), 0 1px 3px rgba(0, 0, 0, 0.1);
}
@media (max-width: 480px) {
  .carbon-login-card {
    padding: 30px 25px;
    border: none;
    box-shadow: none;
  }
}

.logo-section {
  text-align: center;
  margin-bottom: 40px;
}

.carbon-logo .logo-icon {
  width: 70px;
  height: 70px;
  margin: 0 auto 20px;
}
.carbon-logo .logo-icon .logo-svg {
  width: 100%;
  height: 100%;
}
.carbon-logo .logo-text {
  font-size: 24px;
  font-weight: 700;
  margin: 0 0 8px 0;
  color: #2d2d2d;
}
.carbon-logo .logo-subtitle {
  font-size: 14px;
  color: #666666;
  margin: 0;
  letter-spacing: 0.5px;
}

.carbon-form .form-group {
  margin-bottom: 20px;
}
.carbon-form .form-label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: #2d2d2d;
  margin-bottom: 8px;
}
.carbon-form .carbon-input {
  width: 100%;
  padding: 14px 16px;
  background: #ffffff;
  border: 1px solid #e5e5e5;
  border-radius: 8px;
  color: #2d2d2d;
  font-size: 16px;
  transition: all 0.3s ease;
}
.carbon-form .carbon-input::-moz-placeholder {
  color: #999999;
}
.carbon-form .carbon-input::placeholder {
  color: #999999;
}
.carbon-form .carbon-input:focus {
  outline: none;
  border-color: #2d2d2d;
  box-shadow: 0 0 0 3px rgba(45, 45, 45, 0.1);
}

.form-group-checkbox {
  margin: 25px 0;
}

.checkbox-label {
  display: flex;
  align-items: center;
  cursor: pointer;
  -webkit-user-select: none;
     -moz-user-select: none;
          user-select: none;
}
.checkbox-label .carbon-checkbox {
  display: none;
}
.checkbox-label .carbon-checkbox:checked + .checkbox-custom {
  background: #2d2d2d;
  border-color: #2d2d2d;
}
.checkbox-label .carbon-checkbox:checked + .checkbox-custom::after {
  opacity: 1;
  transform: scale(1);
}
.checkbox-label .checkbox-custom {
  width: 18px;
  height: 18px;
  border: 2px solid #e5e5e5;
  border-radius: 3px;
  margin-right: 12px;
  position: relative;
  transition: all 0.3s ease;
}
.checkbox-label .checkbox-custom::after {
  content: "";
  position: absolute;
  top: 1px;
  left: 5px;
  width: 5px;
  height: 9px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg) scale(0);
  opacity: 0;
  transition: all 0.3s ease;
}
.checkbox-label .checkbox-custom:hover {
  border-color: #666666;
}
.checkbox-label .checkbox-text {
  font-size: 14px;
  color: #666666;
}

.form-actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  margin-top: 25px;
}

.action-links {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
}

.forgot-password-link,
.register-link {
  color: #666666;
  text-decoration: none;
  transition: all 0.3s ease;
}
.forgot-password-link:hover,
.register-link:hover {
  color: #2d2d2d;
  text-decoration: underline;
}

.register-link {
  color: #2d2d2d;
  font-weight: 600;
}
.register-link:hover {
  color: #1a1a1a;
}

.link-divider {
  color: #999999;
  margin: 0 4px;
}

.carbon-button {
  width: 100%;
  padding: 14px 32px;
  background: #2d2d2d;
  border: none;
  border-radius: 8px;
  color: white;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
}
.carbon-button .button-text {
  position: relative;
  z-index: 2;
}
.carbon-button:hover {
  background: #1a1a1a;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(45, 45, 45, 0.2);
}
.carbon-button:active {
  transform: translateY(0);
}

.login-footer {
  text-align: center;
  margin-top: 30px;
  padding-top: 20px;
  border-top: 1px solid #e5e5e5;
}
.login-footer p {
  margin: 0;
  font-size: 12px;
  color: #999999;
  letter-spacing: 0.5px;
}

.mb-4 {
  margin-bottom: 1rem;
}
.mb-4 ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.mb-4 ul li {
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: 6px;
  padding: 12px 16px;
  color: #dc2626;
  font-size: 14px;
  margin-bottom: 8px;
}
.mb-4 ul li:last-child {
  margin-bottom: 0;
}

.text-green-600 {
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  border-radius: 6px;
  padding: 12px 16px;
  color: #16a34a;
  font-size: 14px;
}

@media (max-width: 768px) {
  .carbon-login-container {
    padding: 15px;
  }
  .carbon-login-card {
    padding: 30px 20px;
  }
  .carbon-logo .logo-text {
    font-size: 22px;
  }
  .carbon-logo .logo-icon {
    width: 60px;
    height: 60px;
  }
  .carbon-input {
    padding: 12px 14px;
    font-size: 15px;
  }
  .carbon-button {
    padding: 12px 28px;
    font-size: 15px;
  }
}
.carbon-login-card {
  max-width: 450px;
}
@media (max-width: 480px) {
  .carbon-login-card {
    max-width: 100%;
  }
}

.student-fields {
  background: rgba(45, 45, 45, 0.02);
  border: 1px solid #f0f0f0;
  border-radius: 8px;
  padding: 20px;
  margin-top: 15px;
  transition: all 0.3s ease;
}
.student-fields .form-group {
  margin-bottom: 16px;
}
.student-fields .form-group:last-child {
  margin-bottom: 0;
}

.carbon-input[type=date] {
  color: #2d2d2d;
}
.carbon-input[type=date]::-webkit-calendar-picker-indicator {
  filter: invert(0.6);
  cursor: pointer;
}
.carbon-input[type=date]:invalid {
  color: #999999;
}

.login-link {
  color: #2d2d2d;
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
  transition: all 0.3s ease;
}
.login-link:hover {
  color: #1a1a1a;
  text-decoration: underline;
}

.carbon-form .form-group {
  margin-bottom: 18px;
}
.carbon-form .form-group-checkbox {
  margin: 20px 0 15px 0;
}

.field-hint {
  font-size: 12px;
  color: #999999;
  margin-top: 4px;
  line-height: 1.4;
}

.form-label.required::after {
  content: " *";
  color: #dc2626;
  font-weight: bold;
}

.carbon-input.error {
  border-color: #dc2626;
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}
.carbon-input.success {
  border-color: #16a34a;
  box-shadow: 0 0 0 3px rgba(22, 163, 74, 0.1);
}

@media (max-width: 768px) {
  .carbon-login-card {
    padding: 25px 20px;
  }
  .carbon-form .form-group {
    margin-bottom: 16px;
  }
  .student-fields {
    padding: 15px;
    margin-top: 12px;
  }
}
@keyframes slideDown {
  from {
    opacity: 0;
    max-height: 0;
    padding-top: 0;
    padding-bottom: 0;
  }
  to {
    opacity: 1;
    max-height: 200px;
    padding-top: 20px;
    padding-bottom: 20px;
  }
}
.student-fields {
  animation: slideDown 0.3s ease;
}