:root {
  --primary-color: #4F46E5;
  --primary-hover: #4338CA;
  --bg-color: #F3F4F6;
  --card-bg: #FFFFFF;
  --text-main: #1F2937;
  --text-secondary: #6B7280;
  --border-color: #E5E7EB;
  --error: #EF4444;
  --success: #10B981;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-main);
  margin: 0;
  padding: 0;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.auth-container {
  width: 100%;
  max-width: 400px;
  background-color: var(--card-bg);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  border-radius: 1rem;
  padding: 2rem;
  margin: 1rem;
  box-sizing: border-box;
}

.header {
  text-align: center;
  margin-bottom: 2rem;
}

.header h1 {
  margin: 0;
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-main);
}

.header p {
  margin-top: 0.5rem;
  color: var(--text-secondary);
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-main);
  margin-bottom: 0.5rem;
}

.form-input {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  font-size: 1rem;
  transition: all 0.2s;
  box-sizing: border-box;
}

.form-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.form-input.error {
  border-color: var(--error);
}

.error-message {
  color: var(--error);
  font-size: 0.875rem;
  margin-top: 0.25rem;
  display: none;
}

.btn {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 0.5rem;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  background-color: var(--primary-color);
  color: white;
}

.btn:hover {
  background-color: var(--primary-hover);
}

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

.footer-link {
  margin-top: 1.5rem;
  text-align: center;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.footer-link a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
}

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

/* Spinner */
.spinner {
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top: 2px solid white;
  width: 16px;
  height: 16px;
  animation: spin 1s linear infinite;
  margin-right: 0.5rem;
  display: none; /* Hidden by default */
}

.btn.loading .spinner {
  display: block;
}

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

.toast {
  position: fixed;
  top: 1rem;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--text-main);
  color: white;
  padding: 0.75rem 1.5rem;
  border-radius: 0.5rem;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  opacity: 0;
  transition: opacity 0.3s;
  z-index: 1000;
  pointer-events: none;
}

.toast.show {
  opacity: 1;
}

.toast.error {
  background-color: var(--error);
}

.toast.success {
  background-color: var(--success);
}