main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 200px);
  padding: 2rem 0;
}

.login-container {
  width: 100%;
  max-width: 450px;
  margin: 0 auto;
  padding: 0 1rem;
}

.login-card {
  background: white;
  border-radius: 15px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.15);
  overflow: hidden;
  transition: all 0.4s ease;
  border: 1px solid rgba(255,193,7,0.1);
}

.login-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 60px rgba(0,0,0,0.2);
}

.login-header {
  background: linear-gradient(135deg, var(--secondary-color) 0%, var(--secondary-light) 100%);
  color: white;
  padding: 2rem;
  text-align: center;
  position: relative;
}

.login-header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(45deg, var(--primary-color), #ff9800);
}

.login-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--primary-color) 0%, #ff9800 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  color: var(--text-dark);
  font-size: 1.5rem;
  box-shadow: 0 4px 15px rgba(255,193,7,0.3);
}

.login-header h2 {
  font-size: 1.6rem;
  font-weight: 700;
  margin: 0 0 0.5rem 0;
  letter-spacing: 0.5px;
}

.login-header p {
  font-size: 0.9rem;
  opacity: 0.9;
  margin: 0;
  font-weight: 400;
}

.login-body {
  padding: 2rem;
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-group {
  position: relative;
}

.form-group label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 0.6rem;
  font-size: 0.9rem;
  transition: all 0.3s ease;
}

.form-group label i {
  color: var(--primary-color);
  font-size: 0.9rem;
}

.form-group.focused label {
  color: var(--primary-color);
  transform: translateY(-2px);
}

.form-control {
  width: 100%;
  padding: 1rem;
  border: 2px solid #e9ecef;
  border-radius: 10px;
  font-size: 1rem;
  transition: all 0.3s ease;
  background: white;
  color: var(--text-dark);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(255,193,7,0.15);
  transform: translateY(-2px);
}

.form-control:hover {
  border-color: #ddd;
}

.form-control::placeholder {
  color: #999;
  transition: all 0.3s ease;
}

.form-control:focus::placeholder {
  opacity: 0.7;
  transform: translateX(5px);
}

.login-btn-submit {
  background: linear-gradient(135deg, var(--primary-color) 0%, #ff9800 100%);
  color: var(--text-dark);
  padding: 1rem 2rem;
  border: none;
  border-radius: 10px;
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  box-shadow: 0 4px 15px rgba(255,193,7,0.3);
  margin-top: 0.5rem;
}

.login-btn-submit:hover:not(:disabled) {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(255,193,7,0.4);
}

.login-btn-submit:active {
  transform: translateY(-1px);
}

.login-btn-submit:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

.login-btn-submit i {
  font-size: 1rem;
}

.alert {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 1rem;
  border-radius: 8px;
  margin-bottom: 1.5rem;
  border: 1px solid transparent;
  transition: all 0.3s ease;
}

.alert-danger {
  background: #fee;
  color: #c33;
  border-color: #fcc;
}

.alert-success {
  background: #efe;
  color: #383;
  border-color: #cfc;
}

.alert i {
  font-size: 1.1rem;
  flex-shrink: 0;
}

.alert span {
  font-weight: 500;
}

.login-footer {
  background: #f8f9fa;
  padding: 1.5rem;
  text-align: center;
  border-top: 1px solid #e9ecef;
}

.footer-icon {
  width: 30px;
  height: 30px;
  background: linear-gradient(135deg, var(--primary-color) 0%, #ff9800 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 0.5rem;
  color: var(--text-dark);
  font-size: 0.8rem;
}

.login-footer p {
  font-size: 0.85rem;
  color: #666;
  margin: 0;
  line-height: 1.4;
}

.login-btn.active-page {
  background: rgba(255,193,7,0.2);
  color: var(--primary-color);
  pointer-events: none;
}

@media (max-width: 768px) {
  main {
    min-height: calc(100vh - 150px);
    padding: 1.5rem 0;
  }

  .login-container {
    max-width: 400px;
  }

  .login-header {
    padding: 1.5rem;
  }

  .login-header h2 {
    font-size: 1.4rem;
  }

  .login-body {
    padding: 1.5rem;
  }

  .login-icon {
    width: 50px;
    height: 50px;
    font-size: 1.3rem;
  }
}

/* Mobile */
@media (max-width: 480px) {
  main {
    padding: 1rem 0;
  }

  .login-container {
    padding: 0 0.5rem;
    max-width: 100%;
  }

  .login-card {
    margin: 0 0.5rem;
  }

  .login-header {
    padding: 1.2rem;
  }

  .login-header h2 {
    font-size: 1.3rem;
  }

  .login-header p {
    font-size: 0.85rem;
  }

  .login-body {
    padding: 1.2rem;
  }

  .form-control {
    padding: 0.8rem;
    font-size: 0.95rem;
  }

  .login-btn-submit {
    padding: 0.9rem 1.5rem;
    font-size: 0.95rem;
  }

  .login-footer {
    padding: 1.2rem;
  }

  .login-footer p {
    font-size: 0.8rem;
  }
}

@media (max-width: 360px) {
  .login-header {
    padding: 1rem;
  }

  .login-body {
    padding: 1rem;
  }

  .login-footer {
    padding: 1rem;
  }
}

.login-card {
  animation: slideInUp 0.6s ease-out;
}

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.fa-spin {
  animation: spin 1s linear infinite;
}

.form-group.focused .form-control {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(255,193,7,0.1);
}