body {
    background-color: #121212;
    color: #e0e0e0;
    font-family: 'Segoe UI', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.login-container, .dashboard {
    background-color: #1e1e1e;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 0 15px rgba(0,0,0,0.4);
    width: 320px;
    text-align: center;
}

input[type="email"], input[type="password"] {
    width: 90%;
    padding: 0.7rem;
    margin: 0.6rem 0;
    background: #2c2c2c;
    border: 1px solid #444;
    border-radius: 8px;
    color: #fff;
}

button {
    width: 100%;
    padding: 0.7rem;
    background-color: #2196f3;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    margin-top: 1rem;
    font-weight: bold;
}

button:hover {
    background-color: #1976d2;
}

.error {
    background-color: #ff4d4d;
    color: #fff;
    padding: 0.5rem;
    border-radius: 6px;
    margin-bottom: 1rem;
}