.login-layout {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 80vh;
}

.login-box {
    width: 100%;
    max-width: 420px;
}

.page-title.center {
    text-align: center;
}

.form-group {
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-size: 14px;
    margin-bottom: 6px;
}

.form-group input {
    height: 42px;
    padding: 0 12px;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 15px;
    transition: border-color 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: #3f51b5;
}

.login-btn {
    width: 100%;
    height: 44px;
    border: none;
    border-radius: 6px;
    background: #3f51b5;
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
}

.login-btn:hover {
    background: #35449c;
}

.login-btn:active {
    opacity: 0.9;
}

.error-message {
    margin-bottom: 12px;
    color: #d32f2f;
    font-size: 14px;
}

@media (max-width: 600px) {

    .login-layout {
        align-items: flex-start;
        padding-top: 40px;
    }

    .login-box {
        max-width: 100%;
    }

    .card {
        padding: 18px;
    }

    .form-group input {
        height: 48px;
        font-size: 16px;
    }

    .login-btn {
        height: 48px;
        font-size: 16px;
    }
}