body {
    font-family: 'Poppins', sans-serif;
    background: #f4f6f9;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.login-box {
    background: white;
    padding: 40px;
    border-radius: 12px;
    width: 360px;
    box-shadow: 0 12px 35px rgba(0,0,0,0.12);
    animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

h2 {
    margin-bottom: 25px;
    text-align: center;
    font-weight: 600;
    color: #0b2d63;
}

input {
    width: 100%;
    padding: 14px;
    margin-bottom: 18px;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    font-size: 15px;
    transition: 0.2s;
}

input:focus {
    border-color: #0b2d63;
    outline: none;
    box-shadow: 0 0 0 3px rgba(11,45,99,0.15);
}

button {
    width: 100%;
    padding: 14px;
    background: #0b2d63;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    transition: 0.3s ease;
}

button:hover {
    background: #143d84;
}

.error-box {
    background: #ffe6e6;
    color: #b30000;
    padding: 12px;
    border-radius: 6px;
    margin-bottom: 18px;
    text-align: center;
    font-size: 14px;
}