/**
 * Zentrale Login-Styles
 * Modernes, responsives Design für Login und Registrierung
 */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.auth-container {
  width: 100%;
  max-width: 450px;
}

.auth-card {
  background: white;
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  padding: 40px;
  animation: slideUp 0.4s ease-out;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.auth-header {
  text-align: center;
  margin-bottom: 30px;
}

.auth-header h1 {
  font-size: 28px;
  color: #333;
  margin-bottom: 8px;
  font-weight: 600;
}

.auth-header p {
  color: #666;
  font-size: 14px;
}

.auth-form {
  margin-bottom: 20px;
}

.form-group {
  margin-bottom: 20px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 15px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  color: #333;
  font-size: 14px;
  font-weight: 500;
}

.form-group input {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid #e0e0e0;
  border-radius: 8px;
  font-size: 16px;
  transition: all 0.3s ease;
  background: #fafafa;
}

.form-group input:focus {
  outline: none;
  border-color: #667eea;
  background: white;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group input::placeholder {
  color: #999;
}

.form-hint {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  color: #666;
}

.btn-primary {
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.btn-primary:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
}

.btn-primary:active:not(:disabled) {
  transform: translateY(0);
}

.btn-primary:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.error-message {
  background: #fee;
  color: #c33;
  padding: 12px;
  border-radius: 8px;
  margin-bottom: 15px;
  font-size: 14px;
  border-left: 4px solid #c33;
}

.success-message {
  background: #efe;
  color: #3c3;
  padding: 12px;
  border-radius: 8px;
  margin-bottom: 15px;
  font-size: 14px;
  border-left: 4px solid #3c3;
}

/* Utility-Klassen für Sichtbarkeit */
.hidden {
  display: none !important;
}

.visible {
  display: block;
}

.inline {
  display: inline-block;
}

.auth-footer {
  text-align: center;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid #e0e0e0;
}

.auth-footer p {
  color: #666;
  font-size: 14px;
}

.auth-footer a {
  color: #667eea;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
}

.auth-footer a:hover {
  color: #764ba2;
  text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 480px) {
  .auth-card {
    padding: 30px 20px;
  }

  .auth-header h1 {
    font-size: 24px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }
}