:root {
  --primary: #1a73e8;
  --bg: #f4f6f9;
  --card-bg: #ffffff;
  --text-dark: #333;
}

body {
  margin: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: var(--bg);
  color: var(--text-dark);
}

.login-container {
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.login-box {
  background: var(--card-bg);
  padding: 40px;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.1);
  opacity: 0;
  animation: fadeIn 1.2s ease-out forwards;
  width: 320px;
}

@keyframes fadeIn {
  to {
    opacity: 1;
  }
}

input[type="email"], input[type="password"] {
  width: 100%;
  padding: 12px;
  margin: 10px 0;
  border: 1px solid #ccc;
  border-radius: 8px;
  font-size: 1rem;
}

.error {
  color: red;
  font-size: 0.9em;
}

button {
  width: 100%;
  padding: 12px;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: bold;
  cursor: pointer;
  transition: background 0.3s ease;
}

button:hover {
  background: #1558c0;
}