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

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

.login-container {
  width: 100%;
  max-width: 420px;
  padding: 20px;
}

.login-card {
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  overflow: hidden;
}

.login-header {
  background: linear-gradient(135deg, #2563eb, #1e40af);
  color: #fff;
  padding: 32px 24px;
  text-align: center;
}

.login-header h1 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 4px;
}

.login-header p {
  font-size: 14px;
  opacity: 0.85;
}

.auth-form {
  padding: 32px 24px;
}

.auth-form h2 {
  font-size: 20px;
  color: #1e293b;
  margin-bottom: 24px;
  text-align: center;
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: #475569;
  margin-bottom: 6px;
}

.form-group input {
  width: 100%;
  padding: 12px 14px;
  border: 2px solid #e2e8f0;
  border-radius: 8px;
  font-size: 15px;
  color: #1e293b;
  transition: border-color 0.2s;
  outline: none;
}

.form-group input:focus {
  border-color: #2563eb;
}

.btn-auth {
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, #2563eb, #1e40af);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.2s;
  margin-top: 8px;
}

.btn-auth:hover {
  opacity: 0.9;
}

.switch-text {
  text-align: center;
  font-size: 14px;
  color: #64748b;
  margin-top: 20px;
}

.switch-text a {
  color: #2563eb;
  text-decoration: none;
  font-weight: 600;
}

.switch-text a:hover {
  text-decoration: underline;
}

.error-msg {
  background: #fef2f2;
  color: #dc2626;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 14px;
  margin-bottom: 12px;
  border: 1px solid #fecaca;
}

.hidden {
  display: none;
}