* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #f4f6f9;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}
.login-box {
    background: white;
    padding: 40px 30px;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    width: 360px;
    text-align: center;
}
.login-box h2 {
    margin-bottom: 10px;
    color: #2d3748;
}
.login-box p {
    color: #718096;
    font-size: 0.9rem;
    margin-bottom: 25px;
}
.input-group {
    margin-bottom: 20px;
    text-align: left;
}
.input-group label {
    display: block;
    font-size: 0.85rem;
    color: #4a5568;
    margin-bottom: 5px;
}
.input-group input {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #e2e8f0;
    border-radius: 6px;
    font-size: 1rem;
}
button {
    width: 100%;
    padding: 12px;
    background: #2b6cb0;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    cursor: pointer;
    margin-top: 10px;
}
.error-msg {
    color: #e53e3e;
    font-size: 0.85rem;
    margin-top: 15px;
    display: none;
}