:root {
  --primary-indigo: #4c51bf;
  --primary-indigo-hover: #4338ca;
  --light-indigo-bg: #eef2ff;
  --main-bg: #ffffff;
  --text-primary: #1a202c;
  --text-secondary: #718096;
  --border-light: #e2e8f0;
  --card-hover-bg: #f7fafc;
  --success-bg: #c6f6d5;
  --success-text: #276749;
  --danger-bg: #fed7d7;
  --danger-text: #9b2c2c;
}

[data-theme='dark'] {
  --primary-indigo: #6366f1;
  --primary-indigo-hover: #818cf8;
  --light-indigo-bg: #0a0a0f;
  --main-bg: #0d0d14;
  --text-primary: #ffffff;
  --text-secondary: #a0aec0;
  --border-light: #1a1a22;
  --card-hover-bg: #111118;
  --success-bg: #0d1510;
  --success-text: #68d391;
  --danger-bg: #2d1b1b;
  --danger-text: #fc8181;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial,
    'Noto Sans', sans-serif;
  background: var(--light-indigo-bg);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.login-container {
  width: 100%;
  max-width: 420px;
}

.login-card {
  background: var(--main-bg);
  border-radius: 16px;
  padding: 40px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.07);
}

.logo-section {
  text-align: center;
  margin-bottom: 32px;
}

.logo {
  font-size: 32px;
  font-weight: 700;
  color: var(--primary-indigo);
  margin-bottom: 8px;
}

.subtitle {
  color: var(--text-secondary);
  font-size: 14px;
}

.form-section h2 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 24px;
  text-align: center;
  color: var(--text-primary);
}

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

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.form-group input {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border-light);
  border-radius: 8px;
  font-size: 14px;
  background: var(--main-bg);
  color: var(--text-primary);
  transition: border-color 0.2s;
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary-indigo);
}

.btn-primary {
  width: 100%;
  background: var(--primary-indigo);
  color: white;
  padding: 12px 24px;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.2s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn-primary:hover:not(:disabled) {
  background: var(--primary-indigo-hover);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.message {
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 20px;
  font-size: 14px;
  text-align: center;
  display: none;
}

.message.success {
  background: var(--success-bg);
  color: var(--success-text);
}

.message.error {
  background: var(--danger-bg);
  color: var(--danger-text);
}

.divider {
  position: relative;
  text-align: center;
  margin: 24px 0;
}

.divider::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--border-light);
}

.divider span {
  position: relative;
  background: var(--main-bg);
  padding: 0 16px;
  color: var(--text-secondary);
  font-size: 13px;
}

.alternative-action {
  text-align: center;
  margin-top: 24px;
}

.alternative-link {
  color: var(--primary-indigo);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.2s;
}

.alternative-link:hover {
  color: var(--primary-indigo-hover);
  text-decoration: underline;
}

.passkey-info {
  background: var(--card-hover-bg);
  padding: 16px;
  border-radius: 8px;
  margin-bottom: 16px;
}

.passkey-info-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.passkey-info-text {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.loading-spinner {
  display: none;
  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);
  }
}

@media (max-width: 480px) {
  .login-card {
    padding: 30px 20px;
  }

  .logo {
    font-size: 28px;
  }
}