:root {
  --primary-color: #4f46e5;
  --primary-hover: #4338ca;
  --error-color: #ef4444;
  --bg-color: #f3f4f6;
  --card-bg: #ffffff;
  --text-color: #1f2937;
  --input-border: #d1d5db;
  --label-color: #6b7280;
}

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

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: linear-gradient(135deg, var(--bg-color), #e5e7eb);
  padding: 1rem;
}

.login-container {
  background: var(--card-bg);
  padding: 2rem;
  border-radius: 1rem;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
    0 2px 4px -2px rgba(0, 0, 0, 0.1);
  width: 100%;
  max-width: 400px;
  transition: transform 0.3s ease;
}

.login-container h2 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-color);
  text-align: center;
  margin-bottom: 1.5rem;
}

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

.form-group input {
  width: 100%;
  padding: 1.5rem 1rem 0.5rem;
  border: 1px solid var(--input-border);
  border-radius: 0.5rem;
  font-size: 1rem;
  color: var(--text-color);
  background: #f9fafb;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

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

.form-group label {
  position: absolute;
  top: 1rem;
  left: 1rem;
  font-size: 1rem;
  color: var(--label-color);
  pointer-events: none;
  transition: all 0.2s ease;
}

.form-group input:focus + label,
.form-group input:not(:placeholder-shown) + label {
  top: 0.3rem;
  font-size: 0.75rem;
  color: var(--primary-color);
}

.password-toggle {
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  cursor: pointer;
  color: var(--label-color);
  font-size: 0.9rem;
}

.login-container button {
  width: 100%;
  padding: 0.75rem;
  background: linear-gradient(45deg, #007bff, #66b0ff);
  border: none;
  border-radius: 0.5rem;
  color: white;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.3s ease, transform 0.2s ease;
}

.login-container button:hover {
  background: linear-gradient(45deg, #0056b3, #3399ff);
  transform: translateY(-2px);
}

.login-container button:active {
  transform: translateY(0);
}

.error {
  color: var(--error-color);
  font-size: 0.875rem;
  text-align: center;
  margin-top: 1rem;
  background: rgba(239, 68, 68, 0.1);
  padding: 0.5rem;
  border-radius: 0.375rem;
}

@media (max-width: 480px) {
  .login-container {
    padding: 1.5rem;
    max-width: 100%;
  }

  .login-container h2 {
    font-size: 1.25rem;
  }

  .form-group input {
    font-size: 0.9rem;
    padding: 1.25rem 0.75rem 0.4rem;
  }

  .form-group label {
    font-size: 0.9rem;
  }

  .form-group input:focus + label,
  .form-group input:not(:placeholder-shown) + label {
    font-size: 0.7rem;
    top: 0.25rem;
  }

  .login-container button {
    font-size: 0.9rem;
  }
}